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

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. and Hardy, C.J. and Giaquinto, R.O. and Gross, P. and Cline, H.E. and Zhu, Y. and Kenwood, G. and Cohen, S. and Grant, A.K. and Joshi, S. and 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 (U.S.A.)
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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