Radiofrequency Heating during Body Imaging in a 3T Body Coil and Patient Safety

In vivo radiofrequency (RF) heating was simulated by solving the first principles based generic bioheat transfer model (GBHTM) in a digital pig due the power deposition from a 3T body coil. The simulations were validated by measuring the heating using fluoroptic probes in anesthetized swine due to the whole-body average power deposition of 2.77 W/kg for an hour in a 3T scanner. The GBHTM predicted the RF heating accurately. The simulations and measurements provided fundamental understanding of the RF energy transport and related heating in vivo to make MRI more powerful as well as improve patient safety.

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