Class / Patent application number | Description | Number of patent applications / Date published |
324310000 | By scanning sample frequency spectrum | 24 |
20100001727 | METHOD AND APPARATUS FOR ACQUIRING HIGH RESOLUTION SPECTRAL DATA OR HIGH DEFINITION IMAGES IN INHOMOGENEOUS ENVIRONMENTS - A method and apparatus for treating a sample for acquiring high-definition magnetic resonance images (MRI images) or high resolution nuclear magnetic resonance (NMR) spectra even in the presence of magnetic field distortions within one or multiple scans. The spatial nature and temporal dependence of the field inhomogeneities are determined a priori using any of several literature procedures. A static or oscillating magnetic field gradient is applied on the sample so as to endow spins at different positions within the sample with different resonance frequencies. A phase- and amplitude-modulated radiofrequency (RF) pulse is applied in unison with the magnetic field gradient so as to endow spins at different positions within the sample with a homogeneous excitation/inversion profile. The nature of the spatially-selective RF irradiation is tailored in such a way that, when added on top of the effects of the inhomogeneities, the spins' evolution phases and their signal amplitudes at the time of the acquisition become independent of the inhomogeneities. The spin signals thus created are captured and decoded, so as to obtain the spins' response as if the inhomogeneity was not present. The collected data is processed to a suitable rearrangement and Fourier analysis procedure to retrieve a final undistorted image or spectrum. The magnetic field gradient can be oscillated to impose this kind of inhomogeneity corrections on multiple spatial dimensions sequentially, or simultaneously. | 01-07-2010 |
20100039110 | MAGNETIC RESONANCE IMAGING APPARATUS AND MAGNETIC RESONANCE IMAGING METHOD - An MRI apparatus capable of performing a high-speed operation for removing aliasing from the data measured by non-Cartesian imaging in a real space with a small amount of operation is provided. Non-Cartesian data sampling is performed by thinning the number of data by using multiple receiver coils having different sensitivity distribution from each other. Image reconstruction means creates orthogonal data by gridding non-orthogonal data obtained by each receiver coil on a grid having an equal spatial resolution to and a narrower field of view than a target image, subjects it to Fourier transform and creates the first image data containing aliasing components. The second image data is created by using the first image data created for each receiver coil and a sensitivity distribution of each receiver coil. | 02-18-2010 |
20100066366 | Adaptive Signal Averaging Method Which Enhances the Sensitivity of Continuous Wave Magnetic Resonance and Other Analytical Measurements - This method of adaptive signal averaging is used to enhance the signal to noise ratio of magnetic resonance and other analytical measurements which involve repeatable signals partially or completely obscured by noise in a single measurement at a rate much faster than that observed with conventional signal averaging. This technique expedites the signal averaging process because it filters each individual scan in real time with an adaptive algorithm and then averages them separately to provide an averaged filtered signal with less noise. This technique is particularly useful for any type of continuous wave magnetic resonance experiment or any other noisy measurement where signal averaging is utilized. | 03-18-2010 |
20100097062 | Nuclear Magnetic Resonance Imaging Apparatus - A method for obtaining the most appropriate amplitude of signal suppression pulse, which suppresses unnecessary signals from the substance not subjected to measurement, highly accurately, swiftly and stably, and an MRI apparatus that enables the optimization are provided. | 04-22-2010 |
20100117647 | Accelerated Dynamic Magnetic Resonance Imaging in the Presence of Motion and Other Time-Related Disruptions - Embodiments of the present invention relate to accelerated dynamic magnetic resonance imaging (MRI) and, more particularly, to imaging situations where the temporal-encoding strategy is disrupted by time-related events, such as breathing motion. | 05-13-2010 |
20100127705 | METHOD AND APPARATUS FOR MAGNETIC INDUCTION TOMOGRAPHY - A method and an apparatus for magnetic induction tomography, in which an object with inhomogeneous passive electrical properties is exposed to an alternating magnetic field by excitation coils located at different positions, from which receiver coils located at different positions pick up AC signals which contain information concerning the electrical conductivity and its distribution in the object, and images of the spatial electrical properties in the interior of the object are reconstructed from the amplitudes and phases of the received signals, whereas the measurement is carried out at least 2 frequencies and an additional perturbation of the coils and/or the field geometry so as to determine a correction factor with which it is possible to widely eliminate spurious signals generated by changes of the geometry during the object measurement. | 05-27-2010 |
20100148776 | FAST ELECTRON PARAMAGNETIC RESONANCE IMAGING (EPRI) USING CW EPR SPECTROMETER WITH SINUSOIDAL RAPID-SCAN AND DIGITAL SIGNAL PROCESSING - An electron paramagnetic resonance imaging system that includes means for continuously irradiating a sample with RF irradiation; means for imposing on the sample a sinusoidally varying magnetic field along with rotating gradients for spatial encoding; means for directly detecting signal data from the sample, without using field modulation, while irradiating the sample with RF radiation continuously, the means for directly detecting having means for sweeping the sinusoidally varying magnetic field; and means for processing the signal data, using means including a digital signal processor. | 06-17-2010 |
20100156418 | MAGNETIC RESONANCE IMAGING APPARATUS AND MAGNETIC RESONANCE IMAGING METHOD - In order to stably obtain an even fat-suppressed image without reduction of an imaging efficiency and without being affected by unevenness of irradiation magnetic field of an RF pulse, when an imaging sequence having a first sequence part for suppressing a signal from a desired component of an examinee by applying a CHESS pulse and a second sequence part for measuring an echo signal from the examinee is repeated, the flip angle of the CHESS pulse is changed at plural times. In the case of multi-slice imaging, the flip angle of the CHESS pulse is changed in at lest two slice imaging. | 06-24-2010 |
20100201362 | Method of improving magnetic resonance sensitivity - We describe a method for use in enhancing MRI signals and increasing the sensitivity of NMR spectroscopy. The method involves the use of dynamic nuclear polarization (DNP) in which the polarizing agents are sequestered at the interface between two phases a sample phase, and a polarizing phase in such a way that the polarizing agent can be easily removed from the sample prior to analysis. The method produces much efficiency for sample manipulation, and the polarization process. In at least one embodiment the hyper-polarization can be repeated so as to allow the accumulation of spectra of the same material for further increasing the signal to noise ratio. The method also allows a discernment of which peaks in an NMR spectrum of a mixture belong to each individual component. | 08-12-2010 |
20100244834 | AUTOMATED FIBER TRACKING OF HUMAN BRAIN WHITE MATTER USING DIFFUSION TENSOR IMAGING - A magnetic resonance imaging (MRI) system, comprising: a MRI scanner; a signal processing system in communication with the magnetic resonance imaging scanner to receive magnetic resonance (MR) signals for forming magnetic resonance images of a subject under observations; a data storage unit in communication with the signal processing system, wherein the data storage unit contains database data corresponding to a soft tissue region of the subject under observation. The database data includes information identifying at least one soft tissue substructure encompassed by the soft tissue region of the subject under observation. The signal processing system is adapted to process MR signals received from the MRI scanner to automatically identify at least one soft tissue substructure encompassed by the soft tissue region of the subject under observation. | 09-30-2010 |
20100259263 | LONGITUDINAL REGISTRATION OF ANATOMY IN MAGNETIC RESONANCE IMAGING - Devices, systems, and techniques relate to detecting volumetric changes in imaged structures over time, including devices, systems and techniques that enable precise registration of structures (e.g., brain areas) after large or subtle deformations, allowing precise registration at small spatial scales with a low boundary contrast. | 10-14-2010 |
20110050227 | System and Methods for Manipulating Coherence of Spins and Pseudospins Using the Internal Structure of Strong Control Pulses - Systems and methods are provided for controlling coherence of a magnetic resonance signal of spin species. The small difference between hard π pulses and their delta-function approximation is exploited to provide new classes of spin echoes which have applications in nuclear magnetic resonance (NMR) spectroscopy, magnetic resonance imaging (MRI) and magnetic resonance microscopy (MRM), and related spectroscopies of solids, and mixtures of solids and liquids. Systems and methods are also provided for controlling coherence of the resonance signal from pseudospin species. | 03-03-2011 |
20110050228 | AGENT FOR TRANSPORTING NUCLEAR SPIN ORDER AND FOR MAGNETIC RESONANCE IMAGING - An agent for magnetic resonance studies, the agent comprising hyperpolarized | 03-03-2011 |
20110062958 | COMBINED IMAGING SYSTEM, INCLUDING A MAGNETIC RESONANCE SYSTEM AND A UWB RADAR - In a combined imaging system, including a magnetic resonance system and a UWB radar, interference signals in the received signal of the one imaging system can be caused by the respective other imaging system. Therefore filters which contain in particular adaptive filters are used in order to filter out the interference signals caused in the received signal of the one system by the respective other system. By eliminating the mutually negative influence, the advantages can be completely exploited when operating the different imaging systems at the same time. | 03-17-2011 |
20110084693 | SYSTEMS AND METHODS FOR IMAGE RECONSTRUCTION OF SENSITIVITY ENCODED MRI DATA - Methods and systems in a parallel magnetic resonance imaging (MRI) system utilize sensitivity-encoded MRI data acquired from multiple receiver coils together with spatially dependent receiver coil sensitivities to generate MRI images. The acquired MRI data forms a reduced MRI data set that is undersampled in at least a phase-encoding direction in a frequency domain. The acquired MRI data and auto-calibration signal data are used to determine reconstruction coefficients for each receiver coil using a weighted or a robust least squares method. The reconstruction coefficients vary spatially with respect to at least the spatial coordinate that is orthogonal to the undersampled, phase-encoding direction(s) (e.g., a frequency encoding direction). Values for unacquired MRI data are determined by linearly combining the reconstruction coefficients with the acquired MRI data within neighborhoods in the frequency domain that depend on imaging geometry, coil sensitivity characteristics, and the undersampling factor of the acquired MRI data. An MRI image is determined from the reconstructed unacquired data and the acquired MRI data. | 04-14-2011 |
20110316537 | MRI APPARATUS AND MRI METHOD - A magnetic resonance imaging apparatus includes a spectrum acquisition unit and a determining unit. The spectrum acquisition unit acquires a frequency spectrum of magnetic resonance signals from a metabolic product in a target region in an object. The determining unit determines the number of (a) integrations and/or (b) phase encodes of magnetic resonance signals for obtaining the frequency spectrum depending on a factor influencing the frequency spectrum. | 12-29-2011 |
20120001634 | METHOD AND MAGNETIC RESONANCE SYSTEM FOR MR SPECTROSCOPY - A method for MR spectroscopy includes the steps of (a) switching at least one phase coding gradient for spatial coding of a spectral information to be detected, and (b) detection of the spectral information, and repeating (a) and (b) until a predetermined raw data space has been scanned. Specific spectral information is detected in (b) when the at least one phase coding gradient respectively has a value of 0. This specific spectral information is evaluated in order to determine a property of the spectral information already detected in (b), or still to be detected in (b). | 01-05-2012 |
20120007600 | ACCELERATED B1 MAPPING - A method comprises: performing a number of B i field mapping sequences ( | 01-12-2012 |
20120025827 | NUCLEAR QUADRUPOLE RESONANCE SYSTEM AND METHOD FOR STRUCTURAL HEALTH MONITORING - Structural health monitoring using nuclear quadrupole resonance is disclosed. For example, in one embodiment, a method of monitoring stress is provided. The method includes scanning a composite using an NQR spectrometer, the composite having a polymer matrix and a microcrystalline material disposed in the matrix. The microcrystalline material includes molecules having nuclei with respective nuclear quadrupole moments. The method also includes determining microscopic strain distribution indices of the composite from the NQR scans to quantify stress and identify precursors to failure in the composite. | 02-02-2012 |
20130082709 | PARALLEL MAGNETIC RESONANCE IMAGING USING GLOBAL VOLUME ARRAY COIL - A magnetic resonance imaging (MRI) apparatus comprises a plurality of cylindrical electromagnetic coils arranged in a coaxial configuration around a sample region. The coils are used to capture resonance signals from a sample at different times according to a geometric echo effect. The measurements can then be combined to produce an MRI signal. | 04-04-2013 |
20130147483 | MAGNETIC RESONANCE IMAGING APPARATUS AND MULTI-ECHO MULTI-CONTRAST IMAGING METHOD - In multi-echo multi-contrast imaging, the image quality is improved by suppressing an increase in imaging time. In order to do so, the arrangement order of echo signals that form an echo train and k space filled with each echo signal are determined such that the continuity of the echo arrangement is maintained while sharing an echo signal between contrasts in multi-echo multi-contrast imaging. Echo trains that perform echo sharing are arranged in non-oscillatory centric view ordering (NOCO). In addition, the starting point of echo sharing of one echo train is connected to the same position of another echo train. When some discontinuous regions are present, the discontinuous regions may be corrected using continuous data of regions symmetrical thereto on the k space. | 06-13-2013 |
20140132265 | MULTIPLE RESONANCE NMR SPECTROSCOPY USING A SINGLE TRANSMITTER - An NMR imaging system comprising a transceiver module configured to couple with a magnetic resonance transmitter coil, where the transceiver module includes a first transmitter channel and a pulse programmer configured to control the transceiver module, the transceiver module generating a precession and nutation for observing rotation at multiple intervals about the carrier (“PANORAMIC”) waveform, the PANORAMIC waveform configured to produce nuclear polarization. The PANORAMIC waveform may a single-banded PANORAMIC waveform or a multiple-banded PANORAMIC waveform. A method of NMR spectroscopy or imaging, the method comprising: determining for a nuclear spin rotation at least one frequency interval and at least one corresponding phase; creating a PANORAMIC waveform for the at least one frequency interval and the at least one corresponding phase; and applying the PANORAMIC waveform from an amplifier output to a probe input. The PANORAMIC waveform may be a single-banded PANORAMIC waveform or a multiple-banded PANORAMIC waveform. | 05-15-2014 |
20140266202 | Magnetic resonance apparatus for fast and reliable detection and recognition of minute quantities of specific substances - Detection and recognition of taggant substances having predefined zero external field magnetic resonance signatures. An object comprising taggant substance(s) is irradiated with a sequence of specific excitation pulses of electromagnetic radiation within a predetermined time and frequency scanning pattern, responsive nuclear spin echo signals are received from the object with a predetermined time and frequency acquisition pattern and data indicative thereof is generated. The scanning and acquisition patterns used permit successive transmission of pulses of multiple frequencies using a two-pulse spin-echo excitation technique, or a steady state-spin echo excitation technique, and successive acquisition of multiple nuclear spin echo response signals, within a time slot between two successive excitation pulses of a specific excitation frequency. The generated data is correlated with reference data corresponding to predetermined taggant substance(s) and one or more taggant substances are identified based on the determined correlation. | 09-18-2014 |
20150309138 | METHOD AND MAGNETIC RESONANCE APPARATUS FOR ESTABLISHING A RESONANT FREQUENCY - In a method and magnetic resonance apparatus for automated establishing of the resonant frequency or resonant frequencies, especially of protons for magnetic resonance experiments, at least one signal, especially an FID is acquired and Fourier transformed to a spectrum. The number of resonance peaks of the spectrum is determined and the resonant frequency or resonant frequencies are established dependent on the number of peaks. | 10-29-2015 |