PMID: 8583864Jan 1, 1995Paper

Modified birdcage coils for targeted imaging

Magnetic Resonance Imaging
J GassonW Vennart

Abstract

The design of a radiofrequency coil of U-shaped geometry, specifically intended to image individual knuckle joints of the hand, has been investigated. The coil geometry is that of a "split and opened" birdcage coil. The optimum leg positions for such a U-shaped coil have been theoretically predicted using a novel technique that considers both the signal-to-noise ratio and the homogeneity of the field-of-view. Two particular coils of this type have been constructed, each optimum for a different size of image space and assuming a different source of image noise (sample-dominated or coil-dominated). The experimentally determined radiofrequency fields produced by the coils correspond well to theory. Either coil can be used to obtain good-quality, high-resolution (130 microns x 130 microns in-plane) images in vivo of the first, second, or fifth metacarpophalangeal joints of the hand, sites of particular interest in the study of arthritis.

References

Jan 1, 1994·Magnetic Resonance Imaging·T VulloP T Cahill
Jan 1, 1989·IEEE Transactions on Medical Imaging·P M Joseph, D Lu

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Citations

Nov 14, 2014·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·Nicola De Zanche, Klaas P Pruessmann
Feb 13, 2013·NMR in Biomedicine·Atiyah YahyaPeter S Allen
Oct 28, 2009·Journal of Magnetic Resonance Imaging : JMRI·Wingchi E KwokChristopher Ritchlin
Sep 7, 2002·IEEE Transactions on Bio-medical Engineering·Ben G LawrenceDesmond D Yau
May 22, 2002·Investigative Radiology·Laurent LemairePatrick J Cozzone

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