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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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