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Abstract #2306

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

Implant device manufacturers often specify a RF exposure limit based on specific absorption rate (SAR) or B1+rms and a continuous active scan time in the device magnetic resonance imaging (MRI) labelling. Due to the restriction of the labeled SAR, MR sequence parameters may need to be adjusted to reduce RF power, resulting in prolonged scan time. The patient examination duration may be extended by up to 67% when compared to standard protocols. The overall session may be further prolonged due to additional wait time requirements from certain implanted devices, which can result in great inconvenience and extra cost to patients.

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