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Abstract #4177

Initial comparison of RF-induced heating in the ASTM phantom and a cadaver leg: a pilot study

Amgad Louka1,2, Krzysztof Wawrzyn1, Alan Getgood3, Timothy Burkhart4, William B. Handler1, and Blaine A. Chronik1,2

1The xMR Labs, Department of Physics & Astronomy, Western University, London, ON, Canada, 2Department of Medical Biophysics, Western University, London, ON, Canada, 3Fowler Kennedy Sports Medicine Clinic, Western University, London, ON, Canada, 4Lawson Health Research Institute, London, ON, Canada

The current standard for measurement of RF-induced heating for implanted devices is described in ASTM F2182-11a, however this method represents a highly conservative situation (i.e. higher than expected heating). Here we present a pilot cadaveric study investigating the relationship between heating of a standard device (10-cm Ti rod) placed within the ASTM phantom versus a cadaveric leg. At 64 MHz and 128 MHz, the respective implant heating in the cadaver was 1.57 and 9.87 °C, compared to 9.81 and 15.4 °C in the phantom. These results suggest a large margin between heating in the ASTM phantom and heating in-vivo.

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