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Impact of 1.5T SAR Limits on the MRI Scan Time for Implantable Devices
Yuqing Wan1, Nathan Ooms2, Paul Nguyen1, and Guangqiang (Jay) Jiang1
1Axonics Modulation Technologies, Irvine, CA, United States, 2Purdue University, West Lafayette, IN, United States
MR scan time may increase by 67% when the SAR is restricted due to medical implant. The overall session may be further extended due to additional wait time required for certain implants. This can result in great inconvenience and extra cost to patients.
Figure 1 Distributions of the patient examination duration for different scan regions under various RF exposure levels.
Table 2 Scan time for standard protocols under Normal Operating Mode (wbSAR limited to 2W/kg) and the prolonged protocol durations when wbSAR limited to 1W/kg and 0.5W/kg.