SYSTEMS AND METHODS FOR FAST MAGNETIC RESONANCE IMAGE RECONSTRUCTION USING A HEIRARCHICALLY SEMISEPARABLE SOLVER

摘要

Systems and methods for reconstructing images using a hierarchically semiseparable (“HSS”) solver to compactly represent the inverse encoding matrix used in the reconstruction are provided. The reconstruction method includes solving for the actual inverse of the encoding matrix using a direct (i.e., non-iterative) HSS solver. This approach is contrary to conventional reconstruction methods that repetitively evaluate forward models (e.g., compressed sensing or parallel imaging forward models).

主权项

1. A method for reconstructing an image of a subject from data acquired using a magnetic resonance imaging (MRI) system, the steps of the method comprising:
(a) providing data acquired from a subject using an MRI system; (b) computing an inverse of an encoding matrix using a hierarchically semiseparable solver; (c) reconstructing an image of the subject from the provided data using the computed inverse of the encoding matrix.