Toward single breath-hold whole-heart coverage coronary MRA using highly accelerated parallel imaging with a 32-channel MR system

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Item Type:	Article
Title:	Toward single breath-hold whole-heart coverage coronary MRA using highly accelerated parallel imaging with a 32-channel MR system
Creators Name:	Niendorf, T., Hardy, C.J., Giaquinto, R.O., Gross, P., Cline, H.E., Zhu, Y., Kenwood, G., Cohen, S., Grant, A.K., Joshi, S., Rofsky, N.M. and Sodickson, D.K.
Abstract:	Coronary MR angiography (CMRA) is generally confined to the acquisition of multiple targeted slabs with coverage dictated by the competing constraints of signal-to-noise ratio (SNR), physiological motion, and scan time. This work addresses these obstacles by demonstrating the technical feasibility of using a 32-channel coil array and receiver system for highly accelerated volumetric breath-hold CMRA. The use of the 32-element array in unaccelerated CMRA studies provided a baseline SNR increase of as much as 40% over conventional cardiac-optimized phased array coils, which resulted in substantially enhanced image quality and improved delineation of the coronary arteries. Modest accelerations were used to reduce breath-hold durations for tailored coverage of the coronary arteries using targeted multi-oblique slabs to as little as 10 s. Finally, high net accelerations were combined with the SNR advantages of a 3D steady-state free precession (SSFP) technique to achieve previously unattainable comprehensive volumetric coverage of the coronary arteries in a single breath-hold. The merits and limitations of this simplified volumetric imaging approach are discussed and its implications for coronary MRA are considered.
Keywords:	Coronary Angiography, Coronary Vessels, Heart, Computer-Assisted Image Processing, Magnetic Resonance Angiography, Imaging Phantoms, Respiration
Source:	Magnetic Resonance in Medicine
ISSN:	0740-3194
Publisher:	Wiley
Volume:	56
Number:	1
Page Range:	167-176
Date:	July 2006
Official Publication:	https://doi.org/10.1002/mrm.20923
PubMed:	View item in PubMed

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