Modular 32-channel transceiver coil array for cardiac MRI at 7.0T

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Item Type:	Article
Title:	Modular 32-channel transceiver coil array for cardiac MRI at 7.0T
Creators Name:	Graessl, A., Renz, W., Hezel, F., Dieringer, M.A., Winter, L., Oezerdem, C., Rieger, J., Kellman, P., Santoro, D., Lindel, T.D., Frauenrath, T., Pfeiffer, H. and Niendorf, T.
Abstract:	Purpose: To design and evaluate a modular transceiver coil array with 32 independent channels for cardiac MRI at 7.0T. Methods: The modular coil array comprises eight independent building blocks, each containing four transceiver loop elements. Numerical simulations were used for B1+ field homogenization and radiofrequency (RF) safety validation. RF characteristics were examined in a phantom study. The array's suitability for accelerated high spatial resolution two-dimensional (2D) FLASH CINE imaging of the heart was examined in a volunteer study. Results: Transmission field adjustments and RF characteristics were found to be suitable for the volunteer study. The signal-to-noise intrinsic to 7.0T together with the coil performance afforded a spatial resolution of 1.1 × 1.1 × 2.5 mm3 for 2D CINE FLASH MRI, which is by a factor of 6 superior to standardized CINE protocols used in clinical practice at 1.5T. The 32-channel transceiver array supports one-dimensional acceleration factors of up to R = 4 without impairing image quality significantly. Conclusion: The modular 32-channel transceiver cardiac array supports accelerated and high spatial resolution cardiac MRI. The array is compatible with multichannel transmission and provides a technological basis for future clinical assessment of parallel transmission techniques at 7.0T.
Keywords:	Ultrahigh-Field MRI, Cardiovascular MRI, Transceiver Array, Parallel Imaging
Source:	Magnetic Resonance in Medicine
ISSN:	0740-3194
Publisher:	Wiley-Blackwell
Volume:	72
Number:	1
Page Range:	276-290
Date:	July 2014
Official Publication:	https://doi.org/10.1002/mrm.24903
PubMed:	View item in PubMed

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