Accelerated phase contrast flow imaging with direct complex difference reconstruction.

ABSTRACT:

Purpose

To propose and evaluate a new model-based reconstruction method for highly accelerated phase-contrast magnetic resonance imaging (PC-MRI) with sparse sampling.

Theory and methods

This work presents a new constrained reconstruction method based on low-rank and sparsity constraints to accelerate PC-MRI. More specifically, we formulate the image reconstruction problem into separate reconstructions of flow-reference image sequence and complex differences. We then utilize the joint partial separability and sparsity constraints to enable high quality reconstruction from highly undersampled (k,t)-space data. We further integrate the proposed method with ESPIRiT based parallel imaging model to effectively handle multichannel acquisition.

Results

The proposed method wa

SUBMITTER: Sun A 

PROVIDER: S-EPMC5734924 | biostudies-literature | 2017 Mar

REPOSITORIES: biostudies-literature