Presented in part at the 12th Annual Meeting of ISMRM, Kyoto, Japan, 2004, and the 13th Annual Meeting of ISMRM, Miami Beach, FL, USA, 2005.
PROPELLER-EPI with parallel imaging using a circularly symmetric phased-array RF coil at 3.0 T: Application to high-resolution diffusion tensor imaging†
Version of Record online: 18 OCT 2006
Copyright © 2006 Wiley-Liss, Inc.
Magnetic Resonance in Medicine
Volume 56, Issue 6, pages 1352–1358, December 2006
How to Cite
Chuang, T.-C., Huang, T.-Y., Lin, F.-H., Wang, F.-N., Juan, C.-J., Chung, H.-W., Chen, C.-Y. and Kwong, K. K. (2006), PROPELLER-EPI with parallel imaging using a circularly symmetric phased-array RF coil at 3.0 T: Application to high-resolution diffusion tensor imaging. Magn Reson Med, 56: 1352–1358. doi: 10.1002/mrm.21064
- Issue online: 16 NOV 2006
- Version of Record online: 18 OCT 2006
- Manuscript Accepted: 23 JUL 2006
- Manuscript Revised: 13 JUN 2006
- Manuscript Received: 15 DEC 2005
- National Science Council. Grant Numbers: NSC-94-2314-B-002-027, NSC-94-2213-E-011-067
- PROPELLER imaging;
- parallel imaging;
- high-resolution diffusion image;
- geometric distortions
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 × 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. Magn Reson Med, 2006. © 2006 Wiley-Liss, Inc.