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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