Implementation of anatomical navigators for real time motion correction in diffusion tensor imaging

Prospective motion correction methods using an optical system, diffusion-weighted prospective acquisition correction, or a free induction decay navigator have recently been applied to correct for motion in diffusion tensor imaging. These methods have some limitations and drawbacks. This article describes a novel technique using a three-dimensional-echo planar imaging navigator, of which the contrast is independent of the b-value, to perform prospective motion correction in diffusion weighted images, without having to reacquire volumes during which motion occurred, unless motion exceeded some preset thresholds. Water phantom and human brain data were acquired using the standard and navigated diffusion sequences, and the mean and whole brain histogram of the fractional anisotropy and mean diffusivity were analyzed.

Grantor dc:publisher.institution

Department of Human Biology

Year dc:date.issued

2012

Author dc:creator

• Alhamud, Alkathafi Ali

Advisors dc:contributor.advisor

• Van der Kouwe, Andre
• Meintjes, Ernesta

Language dc:language.iso

eng

Handle dc:identifier.uri

http://hdl.handle.net/11427/10052

OAI identifier oai:identifier

oai:open.uct.ac.za:11427/10052