公开(公告)号：US11320506B2

公开(公告)日：2022-05-03

申请号：US16843869

申请日：2020-04-08

Applicant: University of Virginia Patent Foundation

Inventor： Changyu Sun ,  Frederick H. Epstein ,  Yang Yang ,  Xiaoying Cai ,  Michael Salerno ,  Craig H. Meyer ,  Daniel Stuart Weller

IPC: G01R33/48 ,  G01R33/36 ,  G01R33/567 ,  G06T7/262 ,  G01R33/58

Abstract: A computerized method of reconstructing acquired magnetic resonance image (MRI) data to produce a series of output images includes acquiring a multiband k-space data set from a plurality of multiband slices of spiral MRI data; simultaneously acquiring a single band k-space data set comprising respective single band spiral image slices that are each associated with a respective one of the multiband slices in the multiband k-space data set; using the single band k-space data set, for each individual multiband slice, calculating a respective calibration kernel to apply to the multi-band k-space data set for each individual multiband slice; separating each individual multiband slice from the multiband k space data set by phase demodulating the multi-band k-space data using multiband phase demodulation operators corresponding to the individual multiband slice and convolving phase demodulated multi-band k-space data with a selected convolution operator to form a gridded set of the multi-band k-space data corresponding to the individual multiband slice.

公开(公告)号：US11204409B2

公开(公告)日：2021-12-21

申请号：US16599853

申请日：2019-10-11

Applicant: University of Virginia Patent Foundation

Inventor： Luonan Wang ,  Daniel Stuart Weller ,  John P. Mugler, III ,  Craig H. Meyer

IPC: G01V3/00 ,  G01R33/565 ,  G01R33/58 ,  G01R33/567 ,  G01R33/561 ,  G01R33/563

Abstract: Systems and methods for reconstructing a motion-compensated magnetic resonance image are presented. In certain implementations, a computer-implemented method is provided. The method may include a plurality of operations, including receiving a set of k-space data from a magnetic resonance imaging device, dividing the set of k-space data into a plurality of groups, performing a plurality of initialization operations, performing a first iterative process until a first criteria for the first iterative process is achieved for a current scale of motion estimation, performing a second iterative process until a second criteria for the second iterative process is achieved, and outputting a motion-compensated magnetic resonance image reconstructed in accordance with a predetermined scale of motion estimation.

公开(公告)号：US10410330B2

公开(公告)日：2019-09-10

申请号：US15349971

申请日：2016-11-11

Applicant: UNIVERSITY OF VIRGINIA PATENT FOUNDATION

Inventor： Haoyi Liang ,  Daniel Stuart Weller

IPC: G06T7/00 ,  G06T5/00 ,  G06T5/50 ,  H04L29/08

Abstract: An image quality assessment and restoration system may include a processor and a memory storing instructions to receive an input image, receive a predetermined number of parameter candidates, generate a reconstructed image from the input image for each parameter candidate, sort the reconstructed images by the overall comparative quality between them and determine the best reconstructed image, calculate the overall comparative qualities between the remaining reconstructed images and the best reconstructed image, eliminate any parameter candidates that are suboptimal based on the calculated overall comparative quality, iteratively generate and sort additional reconstructed images and eliminate suboptimal parameter candidates until each of the remaining parameter candidates is converged, and output the converged parameters for use in image restoration. The overall comparative quality may depend upon the local gradient-based structure information and/or the global texture quality information.