期刊
MAGNETIC RESONANCE IN MEDICINE
卷 53, 期 2, 页码 479-484出版社
WILEY
DOI: 10.1002/mrm.20358
关键词
high field MRI; B-1 inhomogeneity; tailored RF pulses; small tip-angle approximation; structural brain MRI
资金
- NIDA NIH HHS [R21 DA015900-03, R21 DA015900, 1 R21 DA015900-01] Funding Source: Medline
- NIMH NIH HHS [R01 MH066066, 1 R01 MH66066-01, R01 MH066066-03] Funding Source: Medline
This work presents a small tip-angle 3D tailored RF slab-select pulse for reducing the B-1 field inhomogeneity at 3T. The compensated slice profile was determined from a B-1 inhomogeneity map. SNR improvement and degree of artifact reduction were evaluated in a NiCl2 doped phantom and human brains. The technique was found to reduce inhomogeneities as large as 30% of the peak image magnitude in all three spatial directions in the brain using a standard head coil. (C) 2005 Wiley-Liss, Inc.
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