Patent application number | Description | Published |
20090267602 | SYSTEM AND METHOD FOR ACCELERATED MR IMAGING - A system and method for accelerated MR imaging includes a magnetic resonance imaging (MRI) system having a plurality of gradient coils positioned about a bore of a magnet, and an RF transceiver system and an RF switch controlled by a pulse module to transmit RF signals to an RF coil assembly comprising at least one RF transmit coil and comprising multiple coils to acquire MR images. The MRI apparatus also has a computer programmed to excite multiple pencil regions by use of an under-sampled echo-planar excitation trajectory and acquire MR signals simultaneously on multiple channels of the RF coil assembly. The computer is also programmed to separate contributions from the various multiple pencil regions by use of parallel imaging reconstruction. | 10-29-2009 |
20090273347 | TILED RECEIVER COIL ARRAY WITH IMPROVED SPATIAL COVERAGE - A phased array for a magnetic resonance (MR) imaging apparatus is disclosed that includes a plurality of receiver coils arranged to form a staggered hexagonal coil array, with the staggered hexagonal coil array being rectangular in shape. Included in the plurality of receiver coils are a plurality of standard coils and a plurality of filler coils differing in shape from the standard coils. The shape of the filler coils is such that no more than negligible mutual inductance between the filler coils and all adjacent overlapping standard coils is present. | 11-05-2009 |
20090315562 | SYSTEM AND APPARATUS FOR REDUCING HIGH FIELD SHADING IN MR IMAGING - A system for receiving MR data that includes an RF coil array for a magnetic resonance (MR) imaging apparatus. The RF coil array includes a plurality of non-concentric receiver coils arrayed along a first direction. A receiver coil at a first end of the RF coil array has a perimeter width greater than a perimeter width of a receiver coil at a second end of the RF coil array that is opposite from the first end along the first direction. | 12-24-2009 |
20100128947 | SYSTEM AND METHOD FOR DETERMINING A CARDIAC AXIS - An apparatus, system and method to determine a coordinate system of a heart includes an imager and a computer. The computer is programmed to acquire a first set of initialization imaging data from an anatomical region of a free-breathing subject. A portion of the first set of initialization imaging data includes organ data, which includes cardiac data. The computer is further programmed to determine a location of a central region of a left ventricle of a heart, where the location is based on the organ data and a priori information. The computer is also programmed to determine a short axis of the left ventricle based on the determined location, acquire a first set of post-initialization imaging data from the free-breathing subject from an imaging plane orientation based on the determination of the short axis, and reconstruct at least one image from the first set of post-initialization imaging data. | 05-27-2010 |
20110038560 | SYSTEM AND METHOD FOR PROCESSING DATA SIGNALS - A signal processing method is provided. The signal processing method includes the steps of generating undersampled data corresponding to an object, determining a variable thresholding parameter based on a composition of the undersampled data, and iteratively determining thresholded coefficients to generate a plurality of coefficients by utilizing the undersampled data, a current solution and the variable thresholding parameter by updating the variable thresholding parameter and the current solution, and reconstructing a data signal using the plurality of coefficients. | 02-17-2011 |
20120146646 | NANOPHOTONIC SYSTEM FOR OPTICAL DATA AND POWER TRANSMISSION IN MEDICAL IMAGING SYSTEMS - The present disclosure is directed towards the transmission of data and/or power using nanophotonic elements. For example, in one embodiment, a medical imaging system is provided. The imaging system includes a multiplexed photonic data transfer system having an optical modulator configured to receive an electrical signal representative of a set of data and being operable to modulate a subset of photons defined by time, wavelength, or polarization contained within a beam of light so as to encode the photons with the set of data to produce encoded photons, an optical waveguide interfacing with at least a portion of the optical modulator and configured to transmit the beam of light so as to allow the photons to be modulated by the optical modulator, an optical resonator in communication with the optical waveguide and configured to remove the encoded photons from the beam of light, and a transducer optically connected to the optical resonator and configured to convert the encoded photons into the electrical signal representative of the set of data. | 06-14-2012 |
20130131492 | METHOD AND APPARATUS FOR AUTOMATED TRACKING OF VESSEL MOVEMENT USING MR IMAGING - A system and method is disclosed for tracking a moving object using magnetic resonance imaging. The technique includes acquiring a scout image scan having a number of image frames and extracting non-linear motion parameters from the number of image frames of the scout image scan. The technique includes prospectively shifting slice location using the non-linear motion parameters between slice locations while acquiring a series of MR images. The system and method are particularly useful in tracking coronary artery movement during the cardiac cycle to acquire the non-linear components of coronary artery movement during a diastolic portion of the R-R interval. | 05-23-2013 |
20140005520 | Concurrent Acquisition of PET Fields During Acquisition of a MRI Field of View | 01-02-2014 |
20140079304 | Method and System for Correction of Lung Density Variation in Positron Emission Tomography Using Magnetic Resonance Imaging - Exemplary embodiments of the present disclosure are directed to correcting lung density variations in positron emission tomography (PET) images of a subject using a magnetic resonance (MR) image. A pulmonary vasculature and an outer extent of a lung cavity can be identified in a MR image corresponding to a thoracic region of the subject in response to an intensity associated with pixels in the MR image. The pixels within the outer extent of the lung cavity are classified as corresponding to the pulmonary vasculature or the lung tissue. Exemplary embodiments of the present disclosure can apply attenuation coefficients to a reconstruction of the PET image based on the classification of the pixels within the outer extent of the lung cavity. | 03-20-2014 |
20140148684 | PET Acquisition Scheduling Based on MR SCOUT Images - Exemplary embodiments of the present disclosure are directed to scheduling positron emission tomography (PET) scans for a combined PET-MRI scanner based on an acquisition of MR scout images of a subject. An anatomy and orientation of the subject can be determined based on the MR scout images and the schedule for acquiring PET scans of the subject can be determined from the anatomy of the subject. The schedule generated using exemplary embodiments of the present disclosure can specify a sequence of bed positions, scan durations at each bed position, and whether respiratory gating will be used at one or more of the bed positions. | 05-29-2014 |