Model-based reconstruction framework for correction of signal pile-up and geometric distortions in prostate diffusion MRI.

ABSTRACT:

Purpose

Prostate diffusion-weighted MRI scans can suffer from geometric distortions, signal pileup, and signal dropout attributed to differences in tissue susceptibility values at the interface between the prostate and rectal air. The aim of this work is to present and validate a novel model based reconstruction method that can correct for these distortions.

Methods

In regions of severe signal pileup, standard techniques for distortion correction have difficulty recovering the underlying true signal. Furthermore, because of drifts and inaccuracies in the determination of center frequency, echo planar imaging (EPI) scans can be shifted in the phase-encoding direction. In this work, using a B₀ field map and a set of EPI data acquired with blip-up and blip-down phase

SUBMITTER: Usman M 

PROVIDER: S-EPMC6492108 | biostudies-literature | 2019 Mar

REPOSITORIES: biostudies-literature