Archive for the 'DTI' Category

Diffusion Tensor Imaging feed

Published
by
Aziz
on February 8, 2007
in DTI and Meta
. 0 Comments

I’m adding the DTI feed to the right sidebar now instead of its own page. I still would like to solicit suggestions for other real-time feeds off of PubMed, so leave a comment with your favorite queries.

The PubMed query for the DTI feed is as follows: Continue reading ‘Diffusion Tensor Imaging feed’

PROPELLER-EPI for high-resolution DTI

Published
by
Aziz
on February 1, 2007
in DTI, Journal Club and PROPELLER
. 6 Comments

PROPELLER-EPI with parallel imaging using a circularly symmetric phased-array RF coil at 3.0 T: application to high-resolution diffusion tensor imaging

A technique integrating multishot periodically rotated overlapping parallel lines with enhanced reconstruction (PROPELLER) and parallel imaging is presented for diffusion echo-planar imaging (EPI) at high spatial resolution. The method combines the advantages of parallel imaging to achieve accelerated sampling along the phase-encoding direction, and PROPELLER acquisition to further decrease the echo train length (ETL) in EPI. With an eight-element circularly symmetric RF coil, a parallel acceleration factor of 4 was applied such that, when combined with PROPELLER acquisition, a reduction of geometric distortions by a factor substantially greater than 4 was achieved. The resulting phantom and human brain images acquired with a 256 x 256 matrix and an ETL of only 16 were visually identical in shape to those acquired using the fast spin-echo (FSE) technique, even without field-map corrections. It is concluded that parallel PROPELLER-EPI is an effective technique that can substantially reduce susceptibility-induced geometric distortions at high field strength.

Chuang TC et al. Magn Reson Med. 2006 Dec;56(6):1352-8. PMID: 17051531

Discussion below the fold…. Continue reading ‘PROPELLER-EPI for high-resolution DTI’