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Abstract #4797

The Effect of Human Model Resolution on Numerical Calculation of SAR and Temperature in MRI

Zhangwei Wang1, Christopher M. Collins2, Shuren Zhao1, Fraser J. Robb1

1GE Healthcare Coils, Aurora, OH, USA; 2Department of Radiology, College of Medicine, The Pennsylvania State University, Hershey, PA, USA

Numerical calculation accuracy is related to model resolution. In this study, we adopted 2mm, 3mm, and 5mm human head models in a birdcage coil to investigate the SAR distribution and temperature rise. The results show that maximum SAR in any one cell, one gram, or 10 grams can increase significantly with model resolution. Conversely, the maximum temperature elevation shows more stability with model resolution, and even shows a moderate decrease as resolution increases.