Dynamic field mapping and distortion correction using single-shot blip-rewound EPI and joint multi-echo reconstruction.

ABSTRACT:

Purpose

To develop a method for dynamic ∆B0$$ \Delta {B}_0 $$ mapping and distortion correction.

Methods

A blip-rewound EPI trajectory was developed to acquire multiple 2D EPI images in a single readout with an interleaved order, which allows a short TE difference. A joint multi-echo reconstruction was utilized to exploit the shared information between EPI images. The reconstructed images from each readout are combined to produce a final magnitude image. A ∆B0$$ \Delta {B}_0 $$ map is calculated from the phase of these images for distortion correction. The efficacy of the proposed method is assessed with phantom and in vivo experiments. The performance of the proposed method in the presence of subject motion is also investigated.

Results

Compared to conventional multi

SUBMITTER: Wu W 

PROVIDER: S-EPMC7618198 | biostudies-literature | 2024 Jul

REPOSITORIES: biostudies-literature