Sparse iterative phase correction for MR partial fourier reconstruction

US10068328B2 · kind B2 · utility

Assignee

• Siemens Healthcare Limited · DE

Inventors

• Qiu Wang · Princeton, US
• Esther Raithel · Dormitz, DE

Key dates

• Filing date: Dec 22, 2015
• Grant date: Sep 4, 2018
• Expiry date: Apr 14, 2037

Classification

• Technology area (CPC G): Physics
• CPC primary: G06T2207/30004
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A method for sparse iterative phase correction for Magnetic Resonance (MR) partial Fourier reconstruction includes acquiring a partial Fourier k-space dataset using an MR scanner and estimating, by a control computer, a coil sensitivity map associated with the MR scanner from fully sampled k-space center. The control computer extracts a symmetrically sampled k-space center dataset from the partial Fourier k-space dataset and determines a low-resolution image based on the symmetrically sampled k-space center dataset and the coil sensitivity map. The control computer also determines phase corresponding to the low-resolution image. An iterative reconstruction process may then be applied to generate an image based on the partial Fourier k-space dataset. This iterative reconstruction process applies a Fast Iterative Shrinkage Thresholding Algorithm (FISTA) with phase correction based on the phase corresponding to the low-resolution image.