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.