General Electric Company

Ken-Pin Hwang

Jingfei Ma

Xiaoli Zhao

Ajeetkumar Gaddipati

Ersin Bayram

Zachary Slavens

Kang Wang

Zhiqiang Li

Daniel V Litwiller

A method that includes obtaining an MRI gradient echo train of at least three echo data sets at differing phase angles; producing a plurality of phase error maps among the at least three echo data sets; and imaging at least three distinct chemical species based on the plurality of phase error maps.

Method and apparatus for separating chemical species in magnetic resonance imaging

An apparatus and method of MR imaging is disclosed. The apparatus and method comprises segmenting acquisition of an echo train into separate odd and even acquisition blades in k-space, wherein the odd and even acquisition blades extend orthogonally through a common reference point in a central region of k-space. A segment of MR data is acquired using a quadratic phase modulation scheme, wherein a first set of MR echo signals occurring after odd-numbered RF refocusing pulses are stored in the odd acquisition blade, and a second set of MR echo signals occurring after even-numbered RF refocusing pulses are stored in the even acquisition blade. This acquisition and segmentation is repeated until a sufficient number of blades are acquired to fill k-space. Finally, an image is reconstructed from the acquisition blades.

Apparatus and method for acquisition and reconstruction of non-CPMG propeller sequences

A method for performing motion correction in an autocalibrated, multi-shot diffusion-weighting MR imaging data acquisition includes performing motion correction on k-space data in an autocalibration region for each shot individually and then combining the motion-corrected k-space data from each shot to form a motion-corrected reference autocalibration region. Uncorrected source k-space data points are 'trained to' the motion-corrected k-space data from the motion-corrected reference autocalibration region to determine coefficients that are used to synthesize motion-corrected k-space data in the outer, undersampled regions of k-space. Similarly, acquired k-space lines in the outer, undersampled regions of k-space may also be replaced by motion-corrected synthesized k-space data. The motion-corrected k-space data from the motion-corrected reference autocalibration region may be combined with the synthesized motion-corrected k-space data for the outer, undersampled regions of k-space to reconstruct motion-corrected images corresponding to each coil element. The motion corrected images corresponding to each coil element may be combined into a resultant image.

Method and apparatus for correcting motion in multi-shot diffusion-weighted magnetic resonance imaging

A method for performing correction in an autocalibrated, multi-shot MR imaging data acquisition includes performing correction on k-space data in an autocalibration region for each shot individually and then combining the corrected k-space data from each shot to form a corrected reference autocalibration region. Uncorrected source k-space data points are 'trained to' the corrected k-space data from the corrected reference autocalibration region to determine coefficients that are used to synthesize corrected k-space data in the outer, undersampled regions of k-space. Similarly, acquired k-space lines in the outer, undersampled regions of k-space may also be replaced by corrected synthesized k-space data. The corrected k-space data from the corrected reference autocalibration region may be combined with the synthesized corrected k-space data for the outer, undersampled regions of k-space to reconstruct corrected images corresponding to each coil element. The corrected images corresponding to each coil element may be combined into a resultant image.

Growing community of inventors

Sugar Land, TX, United States of America

Ken-Pin Hwang