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Abstract #1876

RF Safety Evaluation of a Breast Expander Implant at 3.0T

BuSik Park 1 , Amir Razjouyan 2 , Leonardo Angelone 2 , and Sunder s Rajan 3

1 FDA/CBER, Silver Spring, MD, United States, 2 FDA/CDRH/OSEL, MD, United States, 3 Div. of Biomedical Physics, FDA/CDRH, Silver Spring, MD, United States

We present numerical simulations at 128 MHz of specific absorption rate (SAR) in a virtual female model with a breast expander implant. The analysis was performed using four different body positions landmarked to isocenter (i.e., shoulder, heart, sternum, and abdomen). The 10g-averaged SAR (SAR10g) with and without the breast expander implant was evaluated at selected coronal planes (i.e., center of the implant and 37.5 mm above). The simulation results showed that the highest SAR10g changes with the breast expander implant were in the saline volume of the implant. The SAR10g within the implant decreased, compared to background whereas it increased in some of the surrounding regions of the implant. However, the maximum SAR10g (SAR10g-peak) in a selected region of interest (ROI) around the implant was still less compared to the peak value over the entire body (i.e., 26.0 W/kg vs. 41.2 W/kg), indicating no significant effect of the implant on the overall ratio SAR10g-peak/whole-body averaged SAR.

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