Entries |
Document | Title | Date |
20080208037 | METHOD AND SYSTEM FOR EVALUATING VERTEBROBASILAR DISEASE - A method and system are disclosed for evaluating symptomatic VBD which uses quantitative hemodynamic assessment in order to identify patients at high risk for stroke and provide appropriate guidance for intervention. Patients with symptomatic VBD may be considered for intervention to provide blood flow augmentation if evidence of sufficient flow compromise is present as defined by specific flow criteria, and treated medically otherwise. | 08-28-2008 |
20090005672 | IMAGE PROCESSING APPARATUS, IMAGE DIAGNOSTIC APPARATUS AND IMAGE PROCESSING METHOD - An image processing apparatus includes an image data acquisition unit, a development generating unit and a display unit. The image data acquisition unit acquires slice image data with regard to a heart of an object. The development generating unit obtains blood flow perfusion information with regard to a myocardial thickness direction based on the slice image data and generates development data according to a desired development format for displaying the blood flow perfusion information. The display unit displays the development data. | 01-01-2009 |
20090088626 | SYSTEM AND METHOD FOR PROVIDING FLOW-ENHANCED SIGNAL INTENSITY DURING A FUNCTIONAL MRI PROCESS - A method for imaging a brain of a subject includes providing a cognitive task for the subject or measuring resting state blood flow without a cognitive task, applying a saturation pulse sequence to saturate a slice within an imaging volume in the subject, and applying an imaging pulse sequence to acquire data from the imaging volume. A saturated image is acquired shortly after termination of the saturation pulse sequence and a non-saturation image is acquired after spins flowing through the saturated slice have recovered. The saturation image and the non-saturation image are subtracted to generate a blood velocity or perfusion enhanced difference image indicating portions of the brain active during the cognitive task. When measuring resting state blood flow without a cognitive task, the method includes acquiring a calibration scan and performing a quantitative evaluation of the blood velocity perpendicular to the saturated slice. | 04-02-2009 |
20090171186 | MRI APPARATUS AND MAGNETIC RESONANCE IMAGING METHOD - An MRI apparatus acquires a blood signal about blood from a subject having the blood flowing from a first region to a second region via an imaging region. The apparatus includes a first longitudinal magnetization inverting device for inverting a longitudinal magnetization direction of the blood in the first region during a first inversion period, a second longitudinal magnetization inverting device that inverts a longitudinal magnetization direction of the blood in process of longitudinal magnetization recovery and inverts a longitudinal magnetization direction of tissues in the imaging region and the second region during a second inversion period after the first inversion period, and a data acquisition device that acquires a blood signal about blood flowing from the first region to the imaging region during a data acquisition period after the second inversion period. | 07-02-2009 |
20090198123 | MEDICAL IMAGING APPARATUS, ULTRASONIC IMAGING APPARATUS, MAGNETIC RESONANCE IMAGING APPARATUS, MEDICAL IMAGE PROCESSING APPARATUS, AND MEDICAL IMAGE PROCESSING METHOD - A differential-image creating unit creates a three-dimensional image on which an artery is highlighted and a three-dimensional image on which a tumor is highlighted. An image compositing unit combines the three-dimensional images to composite an image. A display control unit displays the composite image on a monitor. Moreover, when compositing an image, the image compositing unit composites the image such that a tumor nutrient blood-flow inside and outside tumor is to be displayed in respective different colors. Furthermore, a blood-flow quantity inside tumor measuring unit calculates a blood-flow quantity inside tumor and a ratio of the blood-flow quantity inside tumor to a tumor volume, and the display control unit displays the blood-flow quantity inside tumor and the ratio of the blood-flow quantity inside tumor to the tumor volume. Accordingly, information that is meaningful for determining malignancy of a tumor can be provided. | 08-06-2009 |
20090221904 | INFLAMMATORY CONDITION PROGRESSION, DIAGNOSIS AND TREATMENT MONITORING METHODS, SYSTEMS, APPARATUS, AND USES - The present invention relates to at least one method, apparatus and/or system for providing at least one lymph node volume for use in the monitoring of progression, diagnosis or treatment of an inflammatory condition, as well as to a computer program product comprising software code portions for implementing the method in accordance with the invention. | 09-03-2009 |
20090221905 | MRI apparatus - An MRI apparatus for imaging a subject so as to emphasize, more than a background tissue, a bodily fluid flowing through an imaging region of the subject, the apparatus includes a transmission coil for transmitting an RF pulse to the subject, a first transmission coil control device for controlling the transmission coil so that the transmission coil transmits a first inversion pulse for inverting longitudinal magnetization components of the bodily fluid and the background tissue to negative values from the positive values, a second transmission coil control device for controlling the transmission coil so that the transmission coil transmits a second inversion pulse for inverting the longitudinal magnetization component of the background tissue to the positive value from the negative value inverted by the first inversion pulse, a third transmission coil control device for controlling the transmission coil so that the transmission coil transmits a third inversion pulse for inverting the longitudinal magnetization component of the background tissue to the negative value from the positive value inverted by the second inversion pulse and a fourth transmission coil control device for controlling the transmission coil so that the transmission coil transmits an excitation pulse for acquiring data about the bodily fluid. | 09-03-2009 |
20090253982 | ASSESSING SUBJECT'S REACTIVITY TO PSYCHOLOGICAL STRESS USING FMRI - This invention relates to the use of a quantitative functional MRI (fMRI)—arterial spin-labeling perfusion MRI or absolute T2 mapping MRI or a combination thereof in the non-invasive neuroimaging of a subject's brain in response to stress-inducing psychological stimuli, which can be utilized to predict individual stress reactivity as well as to be used as a human model for testing or optimizing psychopharmacological agents. | 10-08-2009 |
20090264731 | MEDICAL IMAGING APPARATUS AND MEDICAL DISPLAY IMAGE GENERATION METHOD - A medical imaging apparatus includes a positioning image acquisition unit which acquires a positioning image concerning a subject, a unit which sets an region of interest in the positioning image in accordance with specification performed by an operator, a monitoring image acquisition unit which repeatedly acquires a monitoring image concerning the subject at predetermined time intervals, and a generation unit which combines an region-of-interest image representing the region of interest with the monitoring image to generate a display image every time the monitoring image is acquired. | 10-22-2009 |
20100022869 | MAGNETIC RESONANCE IMAGING APPARATUS - A apparatus includes a unit which detects a magnetization vector for each of pixel positions in an imaging region including at least part of a subject, the magnetization vector being excited to have a phase difference between a flow portion and a static portion or between a normal portion and an abnormal portion, a decision unit which decides a pixel value of each pixel position as a value proportional to an absolute value of the amplitude of the magnetization vector detected for each of the pixel positions, and a unit which corrects, on the basis of a real part or phase of the magnetization vector detected for each of the pixel positions, the pixel value decided by the decision unit so that the difference of the pixel value increases between the flow portion or the abnormal portion and the static portion or the normal portion. | 01-28-2010 |
20100030062 | SYSTEM AND METHOD TO ANALYZE BLOOD PARAMETERS USING MAGNETIC RESONANCE IMAGING - A system and method for accurately producing MR images of selected vascular compartments includes employing a control scan and a tag scan, each including velocity selective modules that suppress signal from blood flowing faster than a given cutoff velocity, to acquire control and tag sets of NMR data that may be subtracted to produce a compartment-specific MR image that is substantially free of information from stationary tissues and blood outside the selective vascular compartments. Accordingly, physiological parameters, such as oxygen saturation (SaO | 02-04-2010 |
20100041981 | APPLICATIONS OF SCALING LAWS OF TREE STRUCTURES - In at least one embodiment, a method for diagnosing vascular disease is provided, the method comprising the steps of obtaining a vessel image showing a vasculature of a vessel, identifying at least two measurements from the vasculature of the vessel, the measurements relating to at least two parameters, calculating a relationship between the at least two parameters from the at least two measurements to generate one or more vasculature data points, and comparing the one or more vasculature data points to data relative to a model vasculature to determine the extent of vascular disease. In an another embodiment, a method for diagnosing vascular disease in a patient's vascular tree is provided, the method comprising the steps of generating a model vascular tree from a minimum energy hypothesis calculation, and comparing the patient's vascular tree with the model vascular tree to determine the extent of vascular disease. | 02-18-2010 |
20100041982 | MAGNETIC RESONANCE IMAGING APPARATUS AND MAGNETIC RESONANCE IMAGING METHOD - A magnetic resonance imaging apparatus includes a trigger generating unit, a blood flow image generating unit and a control unit. The trigger generating unit acquires blood flow information of an object and generates a trigger based on the blood flow information. The blood flow image generating unit acquires imaging data with using the trigger and generates blood flow image data. The control unit controls so as to repeatedly perform a probe sequence for acquiring the blood flow information and an imaging sequence for acquiring the imaging data alternately. | 02-18-2010 |
20100087730 | IMAGE PROCESSING APPARATUS, MAGNETIC RESONANCE IMAGING APPARATUS, AND IMAGE PROCESSING METHOD - A velocity-image creating unit creates a velocity image that indicates a distribution of velocity components with respect to each of a plurality of images obtained by repeating a plurality of number of times Echo Planar Imaging (EPI) that is capable of obtaining velocity components of a Cerebrospinal Fluid (CSF) flowing inside a subject. A velocity-variance image creating unit calculates variance of velocity components along the time sequence by same position on velocity images by using a plurality of created velocity images. A superimposed-image processing unit then superimposes the distribution of the variance of the velocity components according to the velocity-variance image on an average absolute-value image, and an image display unit displays a superimposed image. | 04-08-2010 |
20100094122 | SYSTEM AND METHOD FOR AUTOMATIC, NON-INVASIVE DIAGNOSIS OF PULMONARY HYPERTENSION AND MEASUREMENT OF MEAN PULMONARY ARTERIAL PRESSURE - A method for diagnosing pulmonary hypertension from phase-contrast magnetic resonance (MR) images includes providing a time series of one or more magnetic resonance (MR) flow images of a patient's mediastinum during one or more cardiac cycles, segmenting the pulmonary artery within each image of the times series of images, identifying the anterior wall and pulmonary valve within the segmented pulmonary artery, analyzing blood flow during a diastolic phase of the one or more cardiac cycles to determine a relative duration of blood flow, t | 04-15-2010 |
20100113914 | BLOOD FLOW DYNAMIC ANALYSIS APPARATUS AND METHOD, AND MAGNETIC RESONANCE IMAGING SYSTEM - A blood flow dynamic analysis apparatus acquires data from a plurality of regions lying in slices set to a subject with a contrast agent injected therein and analyzes blood flow dynamics of the subject, based on the data. The apparatus includes a contrast agent concentration profile generation device for generating profiles each indicative of a temporal change in the concentration of the contrast agent for every said region lying in the slices, a characteristic amount calculation device for calculating the concentrations of the contrast agent in the regions after a bolus of contrast agent has passed through the regions, from the profiles, a histogram generation device for generating a histogram containing the concentrations of the contrast agent in the regions after the bolus of contrast agent has passed though the regions, a region determination device for determining a region in which each vein exists, from the regions, based on the histogram, and a function calculation device for calculating a venous output function, based on a temporal change in the concentration of the contrast agent in the region in which the vein exists. | 05-06-2010 |
20100113915 | ORTHOGONALLY POSITIONED TAGGING IMAGING METHOD FOR ARTERIAL LABELING WITH FAIR - Methods, devices, and systems for creating an MRI image using an orthogonally positioned tagging imaging method for arterial labeling with FAIR. Embodiments of the present methods for creating an MRI image may include positioning a perfusion imaging plane that corresponds to an image target area of an imaging object, and causing an MRI image to be generated that corresponds to a representation of the image target area at the perfusion imaging plane. The perfusion imaging plane may be orthogonal to a direction of inflow from immediately proximal arteries of the image target area. | 05-06-2010 |
20100137703 | BLOOD FLOW DYNAMIC ANALYSIS APPARATUS AND MAGNETIC RESONANCE IMAGING SYSTEM - A blood flow dynamic analysis apparatus for determining a baseline indicative of a signal strength prior to an arrival of a contrast agent to a predetermined region of a subject, based on MR signals collected in time series from the predetermined region of the subject with the contrast agent injected therein, includes a time detection unit for detecting a time of data minimal in signal strength, of a first data sequence in which data of signal strengths of the MR signals are arranged in time series, a data fetch unit for fetching a second data sequence which appears prior to the time detected by the time detection unit, from within the first data sequence, a data detection unit for detecting centrally-located data from within a third data sequence obtained by sorting the second data sequence in the order of magnitudes of the signals strengths, a data extraction unit for extracting data from the third data sequence, based on the centrally-located data, and a baseline determination unit for determining the baseline, based on the data extracted by the data extraction unit. | 06-03-2010 |
20100145184 | METHOD AND MAGNETIC RESONANCE SYSTEM FOR DETERMINING A CODING FOR A FLOW MEASUREMENT AND FOR IMPLEMENTING A FLOW MEASUREMENT WITH THE CODING - In a method and magnetic resonance system to determine a flow coding for a flow measurement with the magnetic resonance system, in order to determine the optimal flow coding, a flow pre-measurement with multiple different flow codings is conducted within a slice within a body to be examined, each of these codings allowing flow velocities to be detected with a sensitivity dependent on the respective coding. A velocity distribution is generated from the results of this flow pre-measurement by a Fourier transformation. The optimal flow coding for the flow measurement is then determined based on this spectrum. The flow measurement is implemented by determining angiography measurement data of a volume within the body to be examined, determining a vessel, depending on a user input, from the angiography measurement data, automatically determining dimensions and an orientation of the vessel from the angiography measurement data, automatically determining a slice for the flow measurement depending on the dimensions and the orientation, and implementing the flow measurement in the slice with the determined optimal coding. | 06-10-2010 |
20100160766 | MAGNETIC RESONANCE METHOD AND SYSTEM FOR FLOW MEASUREMENT - In a method for flow measurement with a magnetic resonance system and a correspondingly designed magnetic resonance system angiography measurement data of a volume are obtained within a body to be examined, a vessel is determined depending on a user input by means of the angiography measurement data, dimensions and an orientation of the vessel are automatically determined from the angiography measurement data, a slice geometry for the flow measurement is automatically determined depending on the dimensions and the orientation, and the flow measurement is implemented using the slice geometry. | 06-24-2010 |
20100160767 | METHOD FOR CONTRAST-AGENT-FREE ANGIOGRAPHIC IMAGING IN MAGNETIC RESONANCE TOMOGRAPHY - A method for contrast-agent-free non-triggered angiographic imaging in magnetic resonance tomography that includes the steps of (S | 06-24-2010 |
20100174174 | BLOOD FLOW DYNAMIC ANALYSIS APPARATUS, MAGNETIC RESONANCE IMAGING SYSTEM AND PROGRAM - A blood flow dynamic analysis apparatus for analyzing the dynamic state of a blood flow of a subject using data about a plurality of frame images acquired from the subject with a contrast agent injected therein, includes a map creation device for creating maps each indicative of a characteristic amount related to the dynamic state of the contrast agent or the blood flow, based on the data about the frame images, an unaffected side detection device for detecting an unaffected side of the subject from within each of the maps, and a display condition determination device for determining a display condition used when each of the maps is displayed, based on pixel values of pixels existing in the unaffected side in the map. | 07-08-2010 |
20100198053 | MAGNETIC RESONANCE IMAGING APPARATUS AND MAGNETIC RESONANCE IMAGING METHOD - A magnetic resonance imaging apparatus includes a first blood flow image acquisition unit and a second blood flow image acquisition unit. The first blood flow image acquisition unit acquires a first blood flow image of a breast of an object without contrast medium. The second blood flow image acquisition unit acquires a second blood flow image without contrast medium with applying a spin labeling pulse by which a region to be tagged is set based on the first blood flow image as a reference image so as to distinguish blood flowing into a desired region. | 08-05-2010 |
20100268065 | SYSTEMS AND METHODS FOR IMAGING A BLOOD VESSEL USING TEMPERATURE SENSITIVE MAGNETIC RESONANCE IMAGING - A method for producing an image of a blood vessel in a patient utilizing temperature sensitive MRI measurement. The method includes introducing a fluid in a blood vessel, obtaining magnetic resonance information from the blood vessel, and determining a magnetic resonance parameter using the magnetic resonance information. The method further includes using the magnetic resonance parameter to determine a temperature differential in the blood vessel and producing an image of the blood vessel based on the temperature differential. Systems for producing an image of a blood vessel in a patient using temperature sensitive MRI measurements are also provided. | 10-21-2010 |
20100268066 | System for Automated Parameter Setting in Cardiac Magnetic Resonance Imaging - A system automatically calculates optimal protocol parameters for dark-blood (DB) preparation and inversion recovery. The system automatically determines pulse sequence timing parameters for MR imaging with blood related signal suppression. The system comprises an acquisition processor for acquiring data indicating a patient heart rate. A pulse timing processor automatically determines an acquisition time of an image data set readout, relative to a blood signal suppression related magnetization preparation pulse sequence, by calculating the acquisition time in response to inputs including, (a) the acquired patient heart rate, (b) data indicating a type of image contrast of the pulse sequence employed and (c) data indicating whether an anatomical signal suppression related magnetization preparation pulse sequence used has a slice selective, or non-slice selective, data acquisition readout. | 10-21-2010 |
20100280357 | MAGNETIC RESONANCE ANGIOGRAPHY WITH FLOW-COMPENSATED AND FLOW-SENSITIVE IMAGING - In a magnetic resonance angiography method with flow-compensated and flow-sensitive imaging and a magnetic resonance apparatus for implementing such a method, a first MR data set of the examination region is acquired with an imaging sequence in which vessels in the examination region are shown with high signal intensity, a second MR data set of the examination region with an imaging sequence in which the vessels in the examination region are shown with low signal intensity, and the angiographic magnetic resonance image is calculated in a processor by taking the difference of the first and second data set. The first data set is acquired with an imaging sequence with reduced flow sensitivity and the second data set is acquired with an imaging sequence with an increased flow sensitivity compared to the initial imaging sequence. | 11-04-2010 |
20110071384 | MAGNETIC RESONANCE IMAGING APPARATUS - A magnetic resonance imaging apparatus includes an acquisition unit that acquires first data in which a tissue of interest has higher signal intensity than a background and second data in which the tissue of interest has lower signal intensity than the background, with regard to images of the same region of the same subject, and a generation unit that generates, on the basis of the first data and the second data, third data in which the contrast of the tissue of interest to the background is higher than those in the first and second data. | 03-24-2011 |
20110092805 | DIGITAL DRUG DELIVERY - For delivery of a chemical to a target region of a subject's brain, an apparatus comprising a storage medium on which is stored digital representations of subject-specific selective visual stimuli that, when viewed, selectively stimulate blood flow to the target area of the brain; and an electronic display device coupled thereto and configured for converting the stored digital representations to images viewable by the subject; wherein the one or more selective visual stimuli were determined by exposing the subject to a plurality of potential stimuli; measuring the blood flow response to multiple regions of the brain, including the target area and one or more non-target areas; comparing the blood flow responses to the potential stimuli, and selecting as selective stimuli potential stimuli that result in relatively more blood flow to the target area and relatively less blood flow one or more non-target areas. | 04-21-2011 |
20110098556 | Computer-Based Method And System For Imaging-Based Dynamic Function Evaluation Of An Organ - A computer-based method of determining a functional assessment of at least one organ having secretional or excretional functions, such as a liver or kidneys, of a human is disclosed. The method comprises processing a four-dimensional (4D) image data set of said human comprising data for an assessment of said organ function, wherein said 4D image data is acquired by an image modality; and wherein said processing said 4D image data comprises performing a deconvolutional analysis (DA) comprising a matrix inversion using singular value decomposition (SVD) based on said 4D image data. | 04-28-2011 |
20110098557 | SYSTEM AND METHOD FOR DIAGNOSING A FLUID STATUS OF A PATIENT - A system and method for diagnosing a fluid status of a patient includes non-invasively determining a left ventricular pressure of blood within a left ventricle of a heart of the patient. The left ventricular pressure is compared to a predefined pressure value to diagnose the fluid status. | 04-28-2011 |
20110190622 | MAGNETIC RESONANCE IMAGING APPARATUS AND METHOD - A magnetic resonance imaging apparatus executes a pulse sequence for generating a phase shift of each spin, corresponding to a flow rate of the spin to thereby acquire magnetic resonance signals from a subject and determines a position of each blood vessel of the subject, based on each of the magnetic resonance signals. The magnetic resonance imaging apparatus includes a blood vessel position specifying device for specifying a position of each blood vessel, based on a change in signal intensity of the magnetic resonance signal with time and based on a change in the flow rate of the spin with time. | 08-04-2011 |
20110230756 | FLUID FLOW ASSESSMENT - A method of assessing fluid flow in a body is provided which includes phase contrast velocity encoded MRI scanning the body to obtain the velocity of fluids flowing in each of a plurality of volume elements (voxels) in three orthogonal directions; determining whether the flow in each voxel ( | 09-22-2011 |
20110263970 | System for Non-Contrast Enhanced MR Anatomical Imaging - A system for Non-Contrast Agent enhanced MR imaging, includes an MR image acquisition device that acquires first and second datasets representing first and second image slabs individually comprising multiple image slices acquired at fast and slow blood flow portions of a heart cycle and oriented substantially perpendicular in at least one axis to direction of vasculature blood flow, in response to a heart cycle synchronization signal. An image data processor processes imaging datasets representing the first and second image slabs to provide first and second volume datasets representing a 3D volume imaged at the fast blood flow portion and the slow blood flow portion respectively and for providing a difference dataset representing an image difference between the first and second volume datasets and enhancing arterial blood flow. A display processor provides data representing an image showing the enhanced arterial blood flow. | 10-27-2011 |
20110275929 | Device and method for measuring contrast agent - A tomography device ( | 11-10-2011 |
20120046541 | MRI USING HYBRID IMAGE - Magnetic resonance images (MRI) are generated by acquiring a plurality of N>2 image data sets for an imaged patient volume using respectively corresponding different data acquisition imaging parameters. At least one hybrid image data set X is generated for the imaged patient volume based on a combination of at least a subset of the plurality of image data sets. If desired, a further subtraction image (e.g., MRA) data set is generated based on a difference between the at least one hybrid image data set and another image data set, and the subtraction image data set, which may, depending upon implementation, optimize flowing fluids such as blood within arteries or veins, CSF, etc within the imaged patent volume, is output for storage or display as an MR image of the imaged patient volume. | 02-23-2012 |
20120059245 | METHOD AND DEVICE FOR MONITORING AND IMPROVING ARTERIOGENESIS - A method for determining an arteriovascular condition of a subject having an arterial blood flow is shown. The method involves determining a temporal progression of an instantaneous blood flow condition of the arterial blood flow as well as deriving a slew rate of the temporal progression during an increase of the temporal progression. In addition, an arteriovascular condition indicator device is shown, which comprises: an input for receiving an input signal representing an instantaneous arterial blood flow condition of a subject and a slew rate monitor connected to the input. A corresponding control device for providing an activation signal is also shown. The control device comprises a maximum detector connected to the slew rate monitor. A method for stimulation of arteriogenesis is also shown, wherein a temporal progression of an instantaneous blood flow condition is monitored, a slew rate of the temporal progression is derived, and the maximum of the slew rate is determined. An external pressure is applied repeatedly to the arteriovascular section in synchronization with the occurrence of the determined maximum. | 03-08-2012 |
20120059246 | METHOD AND SYSTEM FOR PATIENT-SPECIFIC MODELING OF BLOOD FLOW - Embodiments include a system for determining cardiovascular information for a patient. The system may include at least one computer system configured to receive patient-specific data regarding a geometry of at least a portion of an anatomical structure of the patient. The portion of the anatomical structure may include at least a portion of the patient's aorta and at least a portion of a plurality of coronary arteries emanating from the portion of the aorta. The at least one computer system may also be configured to create a three-dimensional model representing the portion of the anatomical structure based on the patient-specific data, create a physics-based model relating to a blood flow characteristic within the portion of the anatomical structure, and determine a fractional flow reserve within the portion of the anatomical structure based on the three-dimensional model and the physics-based model. | 03-08-2012 |
20120083687 | Retrospectively Correlated Turbo Spin Echo Imaging - Systems and methods which generate a sequence of images using turbo spin echo magnetic resonance imaging which are retrospectively correlated with periodic motion occurring within a subject being imaged are described. In one embodiment, k-space measurements (or the measurements from which images are formed) are captured during, and correlated with, different phases in a cardiac cycle of the subject. With this sequence, the images that are produced are able to show, and/or compensate for, motion correlated with the cardiac cycle of the subject. | 04-05-2012 |
20120083688 | HEAD INJURY DIAGNOSTICS - Systems and methods for detecting the effects of concussion are disclosed. In various embodiments, fMRI or other live analysis technique captures data regarding the subject's brain activity while he or she is performing a task that exercises one or more particular functional centers. In some embodiments, post-collision activity is compared to baseline data, and the diagnosis operates as a function of the comparison. in other embodiments, post-collision activity is analyzed, such as by partitioning the activity data into regions of interest and calculating activity for one particular region in comparison with certain other, perhaps adjacent, regions. | 04-05-2012 |
20120095327 | Non-contrast MRI signal acquisition - A first plurality of MR signals from a patient's tissue at respectively corresponding successive first time increments extending over a first time interval including a substantial majority of a subject's cardiac cycle is acquired and analyzed to define a second time interval, shorter than the first time interval, during the cardiac cycle whereat there is a relatively steep rise in signal magnitudes as a function of time (e.g., corresponding with systole and diastole events of the cardiac cycle). A second plurality of MR signals is then acquired from tissue of the patient at respectively corresponding successive second time increments during the second time interval, the second time increments being substantially shorter than said first time increments. Image data representing at least one contrast-free image of flowing fluid vessels is generated based on the second plurality of MR signals. | 04-19-2012 |
20120123246 | Haemodynamic data estimation - Techniques exist for measuring local blood velocity of flow rate waveforms in, for example, mammalian vascular segments. A method and system for deriving information on disease in vascular segments, for example mean pressure, drop in mean pressure and/or hydraulic resistance, from such measured waveforms is described. The waveforms can, for example, be measured non-invasively using Doppler ultrasound or magnetic resonance techniques. Form factors (Vff, Pff) for the velocity waveform and the centreal arterial pressure are determined. Stenosis may be detected by detecting changes e.g in Vff/Pff. | 05-17-2012 |
20120136240 | NONINVASIVE METHOD TO MEASURE INTRACRANIAL AND EFFECTIVE CEREBRAL OUTFLOW PRESSURE - A system for detecting and measuring increased global or local intracranial pressure includes various devices for performing controlled occlusion of jugular cranial blood outflow and generating occlusion data related to said controlled occlusion, a cranial blood outflow pressure measurement device and a processor for processing jugular cranial blood outflow occlusion data and cranial blood outflow data to identify and/or measure a functional relationship between the jugular controlled occlusion and the jugular cranial blood outflow pressure. A device communicates the functional relationship a display device and/or a patient monitoring system. The processor also detects a state of equilibrium between the jugular cranial blood outflow pressure and the jugular occlusion pressure at occlusion. In yet another embodiment, intracranial and extracranial vessel compliance is measured by NIRS system, the equilibrated using external compression bladder, and equilibrium bladder pressure is displayed as local intracranial pressure. | 05-31-2012 |
20120184843 | METHOD AND APPARATUS FOR BRAIN PERFUSION MAGNETIC RESONANCE IMAGES - The present invention discloses a method and apparatus for brain perfusion magnetic resonance imaging (MRI) technique with the removal of cerebrospinal fluid (CSF) pixels. This invention utilizes a CSF/brain-contrast-enhanced image, wherein the CSF/brain-contrast-enhanced image is defined as the signal difference between CSF and brain matter divided by a standard deviation of air background random noise is larger than 3, acquired from the subject's brain, and applies a segmentation technique to remove the CSF pixels. After removing the CSF pixels on parametric images, the extent of brain tissue with delayed perfusion can be better identified. By using a good region of interest enclosing the correct delayed-perfusion region, the measurement on the tissue volume and perfusion parameters would be more accurate than the area contaminated by CSF pixels. | 07-19-2012 |
20120226141 | MAGNETIC RESONANCE IMAGING APPARATUS AND MAGNETIC RESONANCE IMAGING METHOD - According to one embodiment, a magnetic resonance imaging apparatus includes a structural information acquisition unit, an abnormal part detection unit, an imaging region setting unit and an imaging unit. The structural information acquisition unit is configured to acquire anatomical structural information based on first image data of an object. The abnormal part detection unit is configured to detect an abnormal region based on the structural information. The imaging region setting unit is configured to indicate an imaging region according to a detection result of the abnormal region. The imaging unit is configured to acquire second image data of the object by imaging of an imaging region set based on the imaging region according to the detection result of the abnormal region. | 09-06-2012 |
20120271157 | MAPPING VASCULAR PERFUSION TERRITORIES USING MAGNETIC RESONANCE IMAGING - Techniques, systems computer program products are disclosed for mapping of vascular perfusion territories by applying a train of pseudo-continuous radio frequency tagging pulses to modulate a first magnetization of one or more blood vessels that supply blood to one or more vascular perfusion territories, applying an encoding scheme using unipolar transverse gradient pulses to modulate a second magnetization of blood vessels of the vascular perfusion territories, obtaining efficiency for each blood vessel based on the applied encoding scheme and separating the vascular perfusion territories by using the obtained tagging efficiency in a decoding process. | 10-25-2012 |
20120277572 | Method to Diagnose and Measure Vascular Drainage Insufficiency in the Central Nervous System - Neurodegenerative diseases, such as multiple sclerosis, may be caused or aggravated by insufficient venous draining from the central nervous system. Functional MRI measures the surge of blood flow into localized regions of cerebral cortex in response to activation of those regions by performing visual, auditory or executive tasks. These fMRI measurements are based on blood-oxygen-level dependence. The resulting fMRI/BOLD data is converted to hemodynamic response data and analyzed to determine any abnormality in the hemodynamic response data. Vascular drainage insufficiency is identified in the presence of abnormal hemodynamic response data. Abnormal hemodynamic response data can be determined by a negative trough in a graph of the HDR data or by the duration, depth, or area of the negative trough. | 11-01-2012 |
20120296199 | Apparatus and Method of Non-Contrast Magnetic Resonance Angiography of Abdominal and Pelvic Arteries - Exemplary method and apparatus can be provided for generating information regarding at least one tissue. Using such exemplary method and apparatus, it is possible to generate a plurality of inversion recovery (IR) radio frequency (RF) pulses that are configured to establish an identifier of an element associated with at least one portion of the tissue(s). It is also possible to determine an inversion time associated with at least one of the RF pulses. Further, it is possible to generate, e.g., with a computing arrangement, the information regarding the tissue(s) based on the inversion time. | 11-22-2012 |
20120302872 | MAGNETIC RESONANCE IMAGING APPARATUS AND MAGNETIC RESONANCE IMAGING METHOD - A magnetic resonance imaging apparatus includes an imaging condition setting unit, a scan performing unit and a blood flow image generating unit. The imaging condition setting unit sets a sequence accompanying application of a motion probing gradient pulse as an imaging condition. The scan performing unit performs an imaging scan according to the sequence. The blood flow image generating unit generates a blood flow image based on data acquired by the imaging scan. | 11-29-2012 |
20130006098 | MR-ANGIOGRAPHY WITH NON-CARTESIAN SIGNAL ACQUISITION - In a method and apparatus for the creation of an MR image of a vascular structure of an examination region, the spins in the examination region are saturated by the irradiation of at least one RF saturation signal, which delivers a lower signal intensity as spins in a subsequent MR signal recording for the creation of the MR angiographic image, which flow through at least one blood vessel into the examination region, and are not saturated by the RF saturation pulse. Raw data space of the MR angiographic image is read out with a non-Cartesian trajectory in the MR signal acquisition for the creation of the MR angiographic image. | 01-03-2013 |
20130053685 | MAGNETIC RESONANCE SYSTEM AND PROGRAM - A magnetic resonance system is provided. The magnetic resonance system includes a unit configured to acquire magnetic resonance signals from a region including liquid in a subject using a first sequence having a flow compensation gradient field for changing a phase of a spin according to a flow rate, and acquire magnetic resonance signals from the region using a second sequence free of the flow compensation gradient field. The magnetic resonance system further includes a biological signal generating unit configured to generate biological signals of the subject, based on the magnetic resonance signals acquired by the first sequence and the magnetic resonance signals acquired by the second sequence. | 02-28-2013 |
20130085379 | ARTERIAL SPIN-LABELED (ASL) MULTIPLEXED ECHO PLANAR IMAGING (M-EPI) - An MRI system and method for imaging perfusion in an arterial spin labeled (ASL) process in which multiplexed echo-planar imaging (M-EPI) is used rather than conventional EPI, to thereby speed up imaging and generate sets of images that show different phases of perfusion and provide additional benefits. A single multiband RF excitation pulse can be used to excite multiple slices for imaging, or a time sequence of multiband pulses can be used to further increase the number of slices. | 04-04-2013 |
20130096418 | ARTERIAL BLOOD FLOW AND TRANSIT DELAY MEASUREMENT USING ARTERIAL SPIN LABELING - Techniques and systems are disclosed for measuring arterial transit delay using pseudo- continuous arterial spin labeling (ASL) with variable TR and interleaved post-labeling delays. In one aspect, a magnetic resonance imaging method for measure arterial blood flow and transit delay using arterial spin labeling (ASL) includes applying an ASL pulse sequence. The ASL pulse sequence includes a pre- saturation pulse, and a labeling pulse. The method includes performing data acquisition to measure a transit delay, which represents a time needed for labeled blood to arrive in an imaging slice. | 04-18-2013 |
20130096419 | MAGNETIC RESONANCE IMAGING APPARATUS AND MAGNETIC RESONANCE IMAGING METHOD - A magnetic resonance imaging apparatus includes a collecting unit, a specifying unit, an acquiring unit and a calculating unit. The collecting unit collects a plurality of fluid images that are images of a fluid traveling though a subject. The specifying unit specifies a distance traveled by the fluid by using a difference image between a reference image that is one of the fluid images and each fluid image. The acquiring unit acquires an elapsed time corresponding to the traveled distance from pulse sequence information that is used to collect the fluid images. The calculating unit calculates a flow velocity of the fluid by dividing the traveled distance by the elapsed time. | 04-18-2013 |
20130102884 | NMR measurement of contrast medium concentrations - A method for measuring the cerebral perfusion of a living organism ( | 04-25-2013 |
20130123611 | SYSTEM AND METHOD FOR COMBINED TIME-RESOLVED MAGNETIC RESONANCE ANGIOGRAPHY AND PERFUSION IMAGING - A method for performing magnetic resonance angiography and perfusion imaging using the same pulse sequence is provided. Time-resolved image data is acquired as a contrast agent passes through a subject. This image data is acquired by sampling Cartesian points in k-space that are contained within either a central region of k-space, or one of a plurality of different sets of radial sectors extending outwards from the central region. The image data is combined to form individual image frame data sets that are then reconstructed to produce a time series of image frames. From this time series, MR angiograms and perfusion maps are produced. With the added acquisition of calibration data, T1 relaxation parameters are estimated and quantitative perfusion maps produced. | 05-16-2013 |
20130178733 | FUNCTIONAL BRAIN IMAGING FOR DETECTING AND ASSESSING DECEPTION AND CONCEALED RECOGNITION, AND COGNITIVE/EMOTIONAL RESPONSE TO INFORMATION - This invention provides method and system for measuring changes in the brain activity of an individual by functional brain imaging methods for investigative purposes, e.g., detecting and assessing whether an individual is being truthful or deceptive, and/or whether an individual has a prior knowledge of a certain face or object. The invention combines recent progress in medical brain imaging, computing and neuroscience to produce an accurate and objective method of detection of deception and concealed prior knowledge based on an automated analysis of the direct measurements of brain activity. Applying the paradigm developed from the deception model, and applying it to an individual viewing media information (e.g., audiovisual messages or movies, or announcements), the data is used to interpret the effect of the information on that individual. This permits the effective manipulation of the content of the media segments to achieve maximal desired impact in target populations or on specific individuals. | 07-11-2013 |
20130204123 | SIMULANEOUS MULTISLICE PERFUSION IMAGING IN MRI - An MRI system and method for dynamic susceptibility contrast (DSC) imaging use multiplexed echo planar imaging (M-EPI) to essentially simultaneously acquire MR signals for perfusion parameter images of multiple slices. This essentially simultaneous acquisition of MR signals for multiple slices can be repeated in rapid succession without deteriorating T2* contrast, which makes it practical to image multiple perfusion phases and brings about other significant benefits. | 08-08-2013 |
20130231554 | VESSEL ENCODED ARTERIAL SPIN LABELING USING FOURIER ENCODING SUITABLE FOR VASCULAR TERRITORY MAPPING - Methods, systems, computer programs, circuits and workstations are configured to generate at least one two-dimensional color blood flow map that combines X and Y encoded primary and secondary peak data of 1-dimensional Inverse Fourier Transform images to visually indicate (i) anterior/posterior and right/left directional components of respective feeding arteries using defined colors and (ii) brightness to indicate an amount of blood flow associated with each voxel, with increased brightness associated with increased blood flow. | 09-05-2013 |
20130253307 | MAGNETIC RESONANCE IMAGING APPARATUS AND MAGNETIC RESONANCE IMAGING METHOD - An MRI apparatus includes an imaging data acquiring unit and a blood flow information generating unit. The imaging data acquiring unit acquires imaging data from an imaging region including myocardium, without using a contrast medium, by applying a spatial selective excitation pulse to a region including at least a part of an ascending aorta for distinguishably displaying inflowing blood flowing into the imaging region. The blood flow information generating unit generates blood flow image data based on the imaging data. | 09-26-2013 |
20130281830 | System and Method for Improved Lung Fourier Decomposition Magnetic Resonance Imaging - A system and method for producing a more accurate ventilation image, as compared to existing lung Fourier decomposition methods, and an image of ventilation dependent blood volume are provided. A time series of images depicting a subject's lungs during free-breathing are acquired and co-registered to a reference image. From the registration process, geometric information indicative proton density changes due to inhalation and exhalation of gas is obtained. This geometric information is used to correct the proton density values in the time series of image frames. These corrected proton density values are Fourier transformed to produce a Fourier spectrum, from which a signal peak occurring at the breathing frequency is extracted and Fourier transformed to produce a more accurate ventilation image. This more accurate ventilation image can be subtracted from a breathing frequency image produced by conventional lung Fourier decomposition methods to produce a ventilation dependent blood volume image. | 10-24-2013 |
20130289387 | IMAGE PROCESSING APPARATUS AND MAGNETIC RESONANCE IMAGING APPARATUS - An image processing apparatus according to an embodiment includes a specifying unit and a deriving unit. The specifying unit specifies a fluid region in a plurality of magnetic resonance images that are acquired by applying a labeling pulse to a label region and that are mutually related. The deriving unit derives an index indicating dynamics of a fluid on the basis of the specified fluid region. | 10-31-2013 |
20130303885 | NON-CONTRAST MAGNETIC RESONANCE PERFUSION IMAGING - A magnetic resonance imaging (MRI) system acquires MRI data within one patient breath-hold sufficient to generate (a) at least one tag-off first type non-contrast cardiac perfusion image using a data acquisition sub-sequence including a non-selective IR (inversion recovery) pulse and (b) at least one tag-on second type non-contrast cardiac perfusion image using a data acquisition sub-sequence including a non-selective IR pulse and a spatially selective IR pulse. A set of registered tag-on and tag-off images are differentially combined to produce an accurate cardiac perfusion image. | 11-14-2013 |
20130317348 | SEMI-AUTOMATED NON-CONTRAST MAGNETIC RESONANCE ANGIOGRAPHY (MRA) - A magnetic resonance imaging (MRI) system semi-automatically performs non-contrast magnetic resonance angiography (MRA). An operator display and control input port configures the MRI system to effect semi-automated non-contrast MRA imaging with spatially selective tag and venous suppression RF pulses and/or black blood time interval (BBTI) parameters in a non-contrast MRA data acquisition sequence where such parameters are automatically determined within predetermined, respectively corresponding, spatial regions of patient anatomy. Such automatically determined non-contrast MRA imaging parameters may be entirely automatically set and used or, alternatively, may be displayed to an operator for acceptance and/or change before being used. | 11-28-2013 |
20140018666 | METHOD FOR NON-CONTRAST ENHANCED MAGNETIC RESONANCE ANGIOGRAPHY - A method for non-contrast enhanced magnetic resonance angiography (MRA) of a three-dimensional (3D) volume of a subject having a vascular structure extending through the 3D volume and having flowing spins passing through vascular structure. The method includes applying at least one radiofrequency (RF) pulse to a first slice to label the flowing spins passing into a second slice located within the 3D volume adjacent to the first slice and acquiring imaging data from the second slice using a two-dimensional (2D) pulse sequence and sampling k-space using a non-Cartesian sampling pattern. The acquisition of the of the imaging data is repeated to acquire a series of second slices located across the 3D volume to acquire respective sets of imaging data spanning the 3D volume. The sets of imaging data is reconstructed into a time-series of image frames depicting the flowing spins passing through the vascular structure. | 01-16-2014 |
20140081125 | NON-CONTRAST DYNAMIC MRI MYOCARDIAL PERFUSION ANALYSIS AND VISUALIZATION - Black blood time to inversion (BBTI) tag-on and tag-off images acquired by magnetic resonance imaging (MRI) are analyzed to produce difference magnitude 3D images as a function of time (BBTI values) representing blood perfusion in a region of interest (ROI). Perfusion data of the ROI having values which are different for normal and abnormal myocardial tissues are displayed for plural slices of a 3D image and for plural BBTI values in a single display panel. | 03-20-2014 |
20140121498 | Method To Diagnose and Measure Vascular Drainage Insufficiency in the Central Nervous System - Neurodegenerative diseases, such as multiple sclerosis, may be caused or aggravated by insufficient venous draining from the central nervous system. Functional MRI measures the surge of blood flow into localized regions of cerebral cortex in response to activation of those regions by performing visual, auditory or executive tasks. These fMRI measurements are based on blood-oxygen-level dependence. The resulting fMRI/BOLD data is converted to hemodynamic response data and analyzed to determine any abnormality in the hemodynamic response data. Vascular drainage insufficiency is identified in the presence of abnormal hemodynamic response data. Abnormal hemodynamic response data can be determined by a negative trough in a graph of the HDR data or by the duration, depth, or area of the negative trough. | 05-01-2014 |
20140142416 | SYSTEM AND METHOD FOR DIAGNOSING A FLUID STATUS OF A PATIENT - A system and method for diagnosing a fluid status of a patient includes non-invasively determining a left ventricular pressure of blood within a left ventricle of a heart of the patient. The left ventricular pressure is compared to a predefined pressure value to diagnose the fluid status. | 05-22-2014 |
20140194730 | MAGNETIC RESONANCE IMAGING APPARATUS AND IMAGE PROCESSING APPARATUS - A magnetic resonance imaging (MRI) apparatus according to an exemplary embodiment includes a sequence controller and a data processor. The sequence controller executes a pulse sequence using a combination of multiple types of labeling methods to acquire magnetic resonance signals. The data processor generates multiple types of labeled images based on the magnetic resonance signals. | 07-10-2014 |
20140194731 | APPARATUS AND METHOD FOR NON-INVASIVE MEASUREMENT OF CARDIAC OUTPUT - A comparatively light and compact permanent magnet arrangement for an MRI apparatus has a pair of opposed permanent magnet arrays with a shimming system to adjust the uniformity and strength of a magnetic field in a central chamber of the apparatus. The MRI apparatus is used to examine the extremities of a patient to determine cardiovascular characteristics from an analysis of the blood flow through selected arteries in the extremity. The information collected can be used to calculate such characteristics as total cardiac output, blood flow, arterial wall thickness and elasticity and the presence of plaque. | 07-10-2014 |
20140275976 | Global Ventricular Cardiac Diastolic Function Evaluation System and Associated Methods - A method for evaluating diastolic function of a heart includes measuring a volumetric flow of blood through the heart and determining volume change rates during a diastolic flow period. A diastolic index is formulated from a combination of volume change rates and features of the volumetric change and is weighted by the index for evaluating the weighted feature at a heightened sensitivity against a preselected value. The index weighting provides a measure of diastolic filling performance specific to the weighting parameter. As a result, guidance is provided in evaluating volume changes in heart failure patients, cardiac diastolic performance, medication/titration for diastolic performance, an athletic training program, and cardiac reserve. Guidance is also provided for improving exercise capacity in patients with diastolic dysfunction without requiring the patient to be evaluated during exertion. | 09-18-2014 |
20140309520 | MAGNETIC RESONANCE APPARATUS AND METHOD FOR CALCULATING PERFUSION FRACTION - A magnetic resonance apparatus is provided. The magnetic resonance apparatus includes a scanning unit configured to execute a plurality of T2-weighted sequences having different echo times, and a plurality of diffusion-weighted sequences having different b factors, a first calculating unit configured to calculate a T2 value based on a plurality of T2-weighted images obtained by the plurality of T2-weighted sequences, a second calculating unit configured to calculate a perfusion fraction where the T2 value is not taken into account based on a first T2-weighted image in the plurality of T2-weighted images and a plurality of diffusion-weighted images obtained by the plurality of diffusion-weighted sequences, and a third calculating unit configured to calculate a perfusion fraction where the T2 value has been taken into account based on the T2 value calculated by the first calculating unit, and based on the perfusion fraction calculated by the second calculating unit. | 10-16-2014 |
20140309521 | ALIASING CORRECTION IN PCMR IMAGING - In PCMR (phase contrast magnetic resonance) images, velocity aliasing appears when the maximum velocity in the imaging region is larger than the VENC (velocity encoding) value. Without correction, the aliasing will lead to distorted measurements. A method and system for velocity aliasing correction are described in this invention. The aliasing correction can improve the accuracy of flow quantization with the PCMR technique. | 10-16-2014 |
20140316251 | MRI METHOD FOR INVESTIGATING INTERSTITIAL FLUID VELOCITY IN A TISSUE USING A NULLING PREPARATION - A magnetic resonance imaging (MRI) method of investigating tissue fluid velocity in a region of interest comprising substantially eliminating the magnetic resonance signal of blood flowing in one or more blood vessels in the tissue by applying a nulling preparation to the tissue; and deriving the interstitial fluid velocity using magnetic field gradients. | 10-23-2014 |
20150087967 | METHOD AND APPARATUS USING MAGNETIC RESONANCE IMAGING FOR TISSUE PHENOTYPING AND MONITORING - Provided herein is a Magnetic Resonance Imaging (MRI) technique and, optionally, software, collectively referred to as the “shutter-speed” model, to analyze image data of cancer patients. Embodiments provide a minimally invasive, yet precisely accurate, approach to determining whether tumors are malignant or benign by distinguishing the characteristics of contrast reagent activity in benign and malignant tumors. Exemplary embodiments provide MRI measured biomarkers for tumor malignancy determination and monitoring, effectively eliminating or limiting the false positives suffered by existing MRI techniques while also improving tissue phenotyping and therapeutic intervention monitoring and prediction. | 03-26-2015 |
20150141804 | HIGH-RESOLUTION METABOLIC NEUROIMAGING - Provided herein are methods and apparatuses for determining a level of cellular metabolic activity for a region of interest in order to detect and map on-going gliovascular unit metabolic activity using high-resolution | 05-21-2015 |
20150293199 | METHOD AND APPARATUS FOR DETERMINING CHARACTERISTICS OF CEREBRAL ISCHEMIA BASED ON MAGNETIC RESONANCE DIFFUSION WEIGHTED IMAGING - The present invention disclose a method and apparatus for determining characteristics of cerebral ischemia based on magnetic resonance diffusion weighted imaging, so as to provide a more objective basis for determining whether an acute cerebral ischemia patient should be treated with thrombolysis. The method comprises: determining a cerebral ischemia region of a patient based on a magnetic resonance diffusion weighted imaging of the patient, wherein the cerebral ischemia region comprises a core region and a transition region; determining a DWI gray scale distribution parameter in a region with low ADC values in the magnetic resonance diffusion weighted imaging according to the apparent diffusion coefficient ADC values of the core region and transition region; and judging whether the DWI in the region with low ADC values in the magnetic resonance diffusion weighted imaging and the ADC values in the region with low ADC values in the magnetic resonance diffusion weighted imaging are mismatched according to the DWI gray scale distribution parameter in the region with low ADC values in the magnetic resonance diffusion weighted imaging. The method according to embodiments of the present invention provides a more scientific and objective basis for making a decision on whether the acute cerebral ischemia patient should be treated with thrombolysis, thereby improving a cure rate of the cerebral ischemia patient. | 10-15-2015 |
20150297101 | Arterial Spin Labeling (ASL) With Magnetic Resonance Fingerprinting (MRF) - Example apparatus and methods perform magnetic resonance fingerprinting (MRF) for arterial spin labeling (ASL) based parameter quantification. ASL with MRF produces a nuclear magnetic resonance signal time course from which simultaneous quantification of ASL perfusion-related parameters can be achieved. The parameters may include cerebral blood flow, transit time, T1, or other parameters. The quantification uses values from a dictionary of signal time courses that were generated or augmented using Bloch simulation, knowledge of the sequence, or previous observations. The dictionary may account for inflow or outflow of labeled spins and may model arterial input. An ASL-MRF pulse sequence may differ from conventional pulse sequences. For example, an ASL-MRF pulse sequence may include non-uniform control pulses, non-uniform label pulses, non-uniform post labeling delay time, non-uniform background suppression pulses, non-uniform acquisition repetition time, or non-uniform acquisition flip angle. | 10-22-2015 |
20150305645 | Off-Resonance Correction for Vessel-Selective Pseudo-Continuous Arterial Spin Labeling Imaging - A magnetic resonance imaging (MRI) system, method and/or computer readable medium is configured to effect MR imaging based upon arterial spin labeling (ASL) by forming a plurality of ASL perfusion images of an object where each perfusion image corresponds to a respective phase offset, and by generating a corrected perfusion image by fitting corresponding points from each of the plurality of perfusion images to a polynomial function for respective points of the corrected perfusion image. | 10-29-2015 |
20150323636 | INTERLEAVED BLACK AND BRIGHT BLOOD IMAGING FOR INTERLEAVED DYNAMIC CONTRAST ENHANCED MAGNETIC RESONANCE IMAGING - A magnetic resonance system ( | 11-12-2015 |
20150327783 | NONINVASIVE 4-D TIME-RESOLVED DYNAMIC MAGNETIC RESONANCE ANGIOGRAPHY - A method for non-contrast enhanced 4D time resolved dynamic magnetic resonance angiography using arterial spin labeling of blood water as an endogenous tracer and a multiphase balanced steady state free precession readout is presented. Imaging can be accelerated with dynamic golden angle radial acquisitions and k-space weighted imaging contrast (KWIC) image reconstruction and it can be used with parallel imaging techniques. Quantitative tracer kinetic models can be formed allowing cerebral blood volume, cerebral blood flow and mean transit time to be estimated. Vascular compliance can also be assessed using 4D dMRA by synchronizing dMRA acquisitions with the systolic and diastolic phases of the cardiac cycle. | 11-19-2015 |
20150374247 | METHOD OF MEASURING BLOOD FLOW VELOCITY PERFORMED BY MEDICAL IMAGING APPARATUS, AND THE MEDICAL IMAGING APPARATUS - A method of measuring a blood flow velocity of blood flowing in an object includes obtaining first slab data of a first imaging slab to which a first bipolar gradient is applied, obtaining second slab data of a second imaging slab to which a second bipolar gradient is applied, the second imaging slab being moved to a location different from a location of the first imaging slab, and calculating the blood flow velocity based on data included in slices of the first slab data and slices of the second slab data, the slices of the first slab data being located at a same location as the slices of the second slab data on the object. | 12-31-2015 |
20160007917 | SYSTEM AND METHOD FOR DIAGNOSING A FLUID STATUS OF A PATIENT | 01-14-2016 |
20160015279 | MEDICAL IMAGE PROCESSING APPARATUS - According to one embodiment, a medical image processing apparatus includes an acquiring unit, an identifying unit, and a display controller. The acquiring unit acquires volume data indicating the state of a three-dimensional region including a mass portion and a plurality of blood vessels derived from the mass portion in a subject. The identifying unit specifies a region corresponding to the mass portion and the blood vessels in the volume data as a region of interest. The identifying unit identifies the mass portion and each of the blood vessels in the region of interest. The display controller assigns a different display mode to at least one of the mass portion and the blood vessels. | 01-21-2016 |
20160073910 | System And Method For Thin Slice Acquisition Using Saturation Spin Labeling (TASSL) MR Angiography - A system and method is provided for magnetic resonance angiography (MRA) that includes performing a labeling pulse to a labeling region having a first portion of a vascular system of a subject. The labeling pulse includes at least one excitation pulse and a slab-selective magnetic field gradient to saturate spins flowing from the labeling region and into an imaging region. The process also includes observing a delay period and performing an imaging pulse sequence to collect a label imaging data set from one or more views through the imaging region using an excitation pulse. The preceding is repeated with a TR selected to ensure that the spins flowing within the imaging region are kept substantially saturated during a majority of repetitions. The process also includes acquiring a non-labeling imaging data set without saturating spins and reconstructing an image using the labeling imaging data set and the non-labeling imaging data. | 03-17-2016 |
20160113528 | METHOD AND SYSTEM FOR IMAGE PROCESSING TO DETERMINE PATIENT-SPECIFIC BLOOD FLOW CHARACTERISTICS - Embodiments include a system for determining cardiovascular information for a patient. The system may include at least one computer system configured to receive patient-specific data regarding a geometry of the patient's heart, and create a three-dimensional model representing at least a portion of the patient's heart based on the patient-specific data. The at least one computer system may be further configured to create a physics-based model relating to a blood flow characteristic of the patient's heart and determine a fractional flow reserve within the patient's heart based on the three-dimensional model and the physics-based model. | 04-28-2016 |
20160113548 | SYSTEMS, METHODS, COMPOSITIONS AND DEVICES FOR IN VIVO MAGNETIC RESONANCE IMAGING OF LUNGS USING PERFLUORINATED GAS MIXTURES - Systems and methods for generating MRI images of the lungs and/or airways of a subject using a medical grade gas mixture comprises between about 20-79% inert perfluorinated gas and oxygen gas. The images are generated using acquired | 04-28-2016 |
20160114188 | METHOD AND APPARATUS FOR DETERMINING A RADIATION DOSE OF A RADIOPHARMACEUTICAL - In a method or system for determining a radiation dose of a radiopharmaceutical, magnetic resonance image data of an object under examination are acquired by operation of a magnetic resonance image data acquisition unit. At least one target area and/or at least one area at risk for accumulation of the radiopharmaceutical is/are segmented in the magnetic resonance image data. Molecular image data of the object under examination by operation of a molecular image data acquisition unit during the accumulation of the radiopharmaceutical in the at least one target area and/or the at least one area at risk. A radiation dose of the radiopharmaceutical is determined in the at least one target area and/or the at least one area at risk using the molecular image data. | 04-28-2016 |
20160125597 | NOVEL MAGNETIC RESONANCE IMAGE TECHNIQUE FOR IMAGING AND EVALUATING COLLATERAL CIRCULATION - The present invention relates to a novel magnetic resonance image technique for imaging collateral circulation in a human body. In the present invention, source data of a dynamic susceptibility contrast enhancement perfusion-weighted image (DSC-PWI) is subjected to an image-post-processing and an image obtained through the image-post-processing is then compared with an image obtained by digital subtraction angiography (DSA), thereby imaging the collateral circulation. The method according to the present invention can non-invasively, rapidly and easily visualize and evaluate the collateral circulation. Therefore, the method can provide information, which is important for understanding, treatment strategy determination and outcome prediction of a disease generated due to angiostenosis or occlusion. | 05-05-2016 |
20160166159 | METHOD AND SYSTEM FOR MAPPING TISSUE STATUS OF ACUTE STROKE | 06-16-2016 |
20160183814 | SIMULTANEOUS MULTISLICE PERFUSION IMAGING IN MRI - An MRI system and method for dynamic susceptibility contrast (DSC) imaging use multiplexed echo planar imaging (M-EPI) to essentially simultaneously acquire MR signals for perfusion parameter images of multiple slices. This essentially simultaneous acquisition of MR signals for multiple slices can be repeated in rapid succession without deteriorating T2* contrast, which makes it practical to image multiple perfusion phases and brings about other significant benefits. | 06-30-2016 |
20160192893 | BLOOD FLOW CONTROL SYSTEM AND METHODS FOR IN-VIVO IMAGING AND OTHER APPLICATIONS | 07-07-2016 |
20170236294 | IMAGING ABNORMALITIES IN VASCULAR RESPONSE | 08-17-2017 |