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Published online before print April 19, 2002, 10.1148/radiol.2233010824
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(Radiology 2002;223:870-876.)
© RSNA, 2002

Technical Developments

Wrist: Improved MR Imaging with Optimized Transmit-Receive Coil Design1

Armen Kocharian, PhD, Mark C. Adkins, MD, Kimberly K. Amrami, MD, Kiaran P. McGee, PhD, Peggy A. Rouleau, MD, Doris E. Wenger, MD, Richard L. Ehman, MD and Joel P. Felmlee, PhD

1 From the Magnetic Resonance Imaging Research Laboratory, Mayo Clinic, 200 First St SW, Rochester, MN 55905. From the 2000 RSNA scientific assembly. Received April 20, 2001; revision requested June 14; final revision received December 20; accepted January 4, 2002. Supported by a grant from the Whitaker Foundation. Address correspondence to A.K. (e-mail: kocharian.armen@mayo.edu).

The optimized wrist coil was designed and built as a transmit-receive birdcage coil for 1.5-T magnetic resonance (MR) imaging. Phantom studies were conducted to compare the optimized design with custom-designed and commercially available phased-array wrist coils and showed a 50%–90% improvement in signal-to-noise ratio (SNR). Blinded review of wrist images obtained in six volunteers showed that the optimized birdcage coil was preferred in 75% of the comparisons. An optimized birdcage coil designed for wrist imaging has improved both SNR and uniformity compared with those with a phased-array coil with the same geometry.

© RSNA, 2002

Index terms: Magnetic resonance (MR), coils • Magnetic resonance (MR), technology • Wrist, MR, 43.121411, 43.121415




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