Subject-Motion Correction in HARDI Acquisitions: Choices and Consequences.

ABSTRACT: Diffusion-weighted imaging (DWI) is known to be prone to artifacts related to motion originating from subject movement, cardiac pulsation, and breathing, but also to mechanical issues such as table vibrations. Given the necessity for rigorous quality control and motion correction, users are often left to use simple heuristics to select correction schemes, which involves simple qualitative viewing of the set of DWI data, or the selection of transformation parameter thresholds for detection of motion outliers. The scientific community offers strong theoretical and experimental work on noise reduction and orientation distribution function (ODF) reconstruction techniques for HARDI data, where post-acquisition motion correction is widely performed, e.g., using the open-source DTIprep software (

SUBMITTER: Elhabian S 

PROVIDER: S-EPMC4260507 | biostudies-literature | 2014

REPOSITORIES: biostudies-literature