Abstract #4177

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

Amgad Louka^1,2, Krzysztof Wawrzyn¹, Alan Getgood³, Timothy Burkhart⁴, William B. Handler¹, and Blaine A. Chronik^1,2

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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