A 20-channel receive-only mouse array coil for a 3 T clinical MRI system

Keil, Boris; Wiggins, Graham C; Triantafyllou, Christina; Wald, Lawrence L; Meise, Florian M; Schreiber, Laura M; Klose, Klaus J; Heverhagen, Johannes T (2011). A 20-channel receive-only mouse array coil for a 3 T clinical MRI system. Magnetic resonance in medicine, 66(2), pp. 584-95. New York, N.Y.: Wiley-Liss 10.1002/mrm.22791

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A 20-channel phased-array coil for MRI of mice has been designed, constructed, and validated with bench measurements and high-resolution accelerated imaging. The technical challenges of designing a small, high density array have been overcome using individual small-diameter coil elements arranged on a cylinder in a hexagonal overlapping design with adjacent low impedance preamplifiers to further decouple the array elements. Signal-to-noise ratio (SNR) and noise amplification in accelerated imaging were simulated and quantitatively evaluated in phantoms and in vivo mouse images. Comparison between the 20-channel mouse array and a length-matched quadrature driven small animal birdcage coil showed an SNR increase at the periphery and in the center of the phantom of 3- and 1.3-fold, respectively. Comparison with a shorter but SNR-optimized birdcage coil (aspect ratio 1:1 and only half mouse coverage) showed an SNR gain of twofold at the edge of the phantom and similar SNR in the center. G-factor measurements indicate that the coil is well suited to acquire highly accelerated images.

Item Type:

Journal Article (Original Article)

Division/Institute:

04 Faculty of Medicine > Department of Radiology, Neuroradiology and Nuclear Medicine (DRNN) > Institute of Diagnostic, Interventional and Paediatric Radiology

UniBE Contributor:

Heverhagen, Johannes

ISSN:

0740-3194

Publisher:

Wiley-Liss

Language:

English

Submitter:

Factscience Import

Date Deposited:

04 Oct 2013 14:22

Last Modified:

06 Dec 2013 13:28

Publisher DOI:

10.1002/mrm.22791

PubMed ID:

21433066

Web of Science ID:

000293256800031

URI:

https://boris.unibe.ch/id/eprint/7655 (FactScience: 212966)

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