US 11,948,311 B2
Retrospective motion correction using a combined neural network and model-based image reconstruction of magnetic resonance data
Stephen Cauley, Somerville, MA (US); Melissa Haskell, Cambridge, MA (US); and Lawrence Wald, Cambridge, MA (US)
Assigned to The General Hospital Corporation, Boston, MA (US)
Appl. No. 17/442,962
Filed by THE GENERAL HOSPITAL CORPORATION, Boston, MA (US)
PCT Filed Mar. 26, 2020, PCT No. PCT/US2020/024930
§ 371(c)(1), (2) Date Sep. 24, 2021,
PCT Pub. No. WO2020/198456, PCT Pub. Date Oct. 1, 2020.
Claims priority of provisional application 62/824,576, filed on Mar. 27, 2019.
Prior Publication US 2022/0189041 A1, Jun. 16, 2022
Int. Cl. G06T 7/246 (2017.01); G06T 3/4046 (2024.01)
CPC G06T 7/251 (2017.01) [G06T 3/4046 (2013.01); G06T 2207/10088 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A method for reconstructing an image with reduced motion artifacts from k-space data acquired with a magnetic resonance imaging (MRI) system, the method comprising:
(a) accessing k-space data with a computer system, the k-space data having been acquired from a subject using a magnetic resonance imaging (MRI) system, wherein the k-space data contain motion errors associated with motion of the subject;
(b) reconstructing a motion-corrupted image of the subject from the k-space data using the computer system;
(c) reconstructing a motion-corrected image of the subject from the k-space data using the computer system by:
inputting the motion-corrupted image to a trained neural network, generating output as a motion artifact image that depicts motion artifacts associated with the motion of the subject;
generating a difference image by subtracting the motion artifact image from the motion-corrupted image;
computing motion parameters that define one or more motion trajectories from the difference image and the k-space data; and
reconstructing the motion-corrected image of the subject by inputting the k-space data and the motion parameters to a model-based image reconstruction algorithm, generating output as the motion-corrected image.