Radio-Frequency Induced Heating of Hip and Knee Implants in the Cylindrical and Planar Systems
Kyoko Fujimoto1, Tayeb A Zaidi1, Dave Lampman2, Josha W Guag1, Shawn Etheridge2, Hideta Habara3, and Sunder S Rajan1
1Center for Devices and Radiological Health, US Food and Drug Administration, Silver Spring, MD, United States, 2Hitachi Healthcare Americas, Twinsburg, OH, United States, 3Healthcare Business Unit, Hitachi, Ltd., Tokyo, Japan
The validated
computational modeling offers a viable approach to compare the potential RF-induced heating risk. The 1.2T planar system showed lower risk of heating of hip and knee implants compared to the
1.5T system. Having different coil designs may improve patient access to MRI
scans.
Figure 5: Maximum
intensity projection SAR1g results are shown near the implantable
devices. All the SAR maps were normalized with the B1+ method.
Figure 4:
The slice SAR maps with implants are shown in four different imaging landmarks
for SAR1g and SAR10g. All the SAR maps were
normalized with the B1+ method.