Revealing sub-voxel motions of brain tissue using phase-based amplified MRI (aMRI).

ABSTRACT:

Purpose

Amplified magnetic resonance imaging (aMRI) was recently introduced as a new brain motion detection and visualization method. The original aMRI approach used a video-processing algorithm, Eulerian video magnification (EVM), to amplify cardio-ballistic motion in retrospectively cardiac-gated MRI data. Here, we strive to improve aMRI by incorporating a phase-based motion amplification algorithm.

Methods

Phase-based aMRI was developed and tested for correct implementation and ability to amplify sub-voxel motions using digital phantom simulations. The image quality of phase-based aMRI was compared with EVM-based aMRI in healthy volunteers at 3T, and its amplified motion characteristics were compared with phase-contrast MRI. Data were also acquired on a patient with Chiar

SUBMITTER: Terem I 

PROVIDER: S-EPMC6269230 | biostudies-literature | 2018 Dec

REPOSITORIES: biostudies-literature