期刊
MAGNETIC RESONANCE IN MEDICINE
卷 54, 期 1, 页码 1-8出版社
WILEY
DOI: 10.1002/mrm.20517
关键词
parallel MRI; self-calibration; non-Cartesian imaging; coil arrays; rapid imaging
资金
- NHLBI NIH HHS [R29 HL60802] Funding Source: Medline
- NIBIB NIH HHS [R01 EB00447] Funding Source: Medline
The use of self-calibrating techniques in parallel magnetic resonance imaging eliminates the need for coil sensitivity calibration scans and avoids potential mismatches between calibration scans and subsequent accelerated acquisitions (e.g., as a result of patient motion). Most examples of self-calibrating Cartesian parallel imaging techniques have required the use of modified k-space trajectories that are densely sampled at the center and more sparsely sampled in the periphery. However, spiral and radial trajectories offer inherent self-calibrating characteristics because of their densely sampled center. At no additional cost in acquisition time and with no modification in scanning protocols, in vivo coil sensitivity maps may be extracted from the densely sampled central region of k-space. This work demonstrates the feasibility of self-calibrated spiral and radial parallel imaging using a previously described iterative non-Cartesian sensitivity encoding algorithm. (c) 2005 Wiley-Liss, Inc.
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