SimultaneousB1+ homogenization and specific absorption rate hotspot suppression using a magnetic resonance phased array transmit coil
نویسندگان
چکیده
منابع مشابه
Simultaneous B1+ homogenisation and SAR hotspot suppression by a phased array MR transmit coil
C. A. van den Berg, B. van den Bergen, H. Kroeze, L. W. Bartels, J. J. Lagendijk Dept. of Radiotherapy, University Medical Centre, Utrecht, Utrecht, Netherlands, Dept. of Radiology, University Medical Centre, Utrecht, Utrecht, Netherlands Introduction The application of MR imaging at high field (B0 ≥ 3 T, f ≥ 128 MHz) faces considerable challenges with respect to uniformity of the RF magnetic e...
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PURPOSE To improve the homogeneity of transmit volume coils at high magnetic fields (> or =4 T). Due to radiofrequency (RF) field/tissue interactions at high fields, 4 T to 8 T, the transmit profile from head-sized volume coils shows a distinctive pattern with relatively strong RF magnetic field B(1) in the center of the brain. MATERIALS AND METHODS In contrast to conventional volume coils at...
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ژورنال
عنوان ژورنال: Magnetic Resonance in Medicine
سال: 2007
ISSN: 0740-3194,1522-2594
DOI: 10.1002/mrm.21149