Meeting Banner
Abstract #3853

Feasibility of a Local SAR Monitoring for a 7T Body Transmit Array with Single Element Power Monitoring

Ozlem Ipek1, Alexander J. E. Raaijmakers1, Dennis W. J. Klomp2, Alessandro Sbrizzi3, Peter R. Luijten2, Jan J. W. Lagendijk1, Cornelis A. T. van Den Berg1

1Radiotherapy, UMC Utrecht, Utrecht, Netherlands; 2Radiology, UMC Utrecht, Utrecht, Netherlands; 3Radiotherapy , UMC Utrecht, Utrecht, Netherlands

7 T prostate imaging with a radiative antenna (single-side adapted dipole antenna) surface array was simulated with FDTD to investigate the worst-case local SAR compared to the SAR distribution of each individually simulated element. Worst- case SAR is calculated from sum of magnitudes of E fields of individually driven elements of the array. There is a correlation between the SAR hotspots for the single element and a worst case combination of all elements: 1) the location is identical 2) the single element values correlate with worst case combination but a maximum under estimation of 80% is possible.