Distortion correction in diffusion-weighted imaging of the breast: Performance assessment of prospective, retrospective, and combined (prospective + retrospective) approaches.

ABSTRACT:

Purpose

To compare the effectiveness of prospective, retrospective, and combined (prospective + retrospective) EPI distortion correction methods in bilateral breast diffusion-weighted imaging (DWI) scans.

Methods

Five healthy female subjects underwent an axial bilateral breast DWI exam with and without prospective B₀ inhomogeneity correction using slice-by-slice linear shimming. In each case, an additional b=0 DWI scan was performed with the polarity of the phase-encoding gradient reversed, to generate an estimated B₀ map; this map or a separately acquired B₀ map was used for retrospective correction, either alone or in combination with the prospective correction. The alignment between an undistorted, anatomical reference scan with similar co

SUBMITTER: Hancu I 

PROVIDER: S-EPMC5233674 | biostudies-literature | 2017 Jul

REPOSITORIES: biostudies-literature