Improved assessment of radiofrequency electromagnetic field power deposition near orthopaedic device using a bone-inclusive ASTM phantom under 1.5T and 3T MRI.
Research
RF Safe Research Library
Jan 1, 2024
This engineering/simulation study proposes a bone-inclusive ASTM phantom to improve assessment of RF power deposition near orthopaedic implants during 1.5 T and 3 T MRI. Using numerical simulations across multiple implant families, the authors report better correlation of peak 1 g SAR near implants with anatomically…
Dependence of RF heating on SAR and implant position in a 1.5T MR system.
Research
RF Safe Research Library
Jan 1, 2007
This phantom study measured RF-induced heating of a stainless steel humerus implant during 1.5T MR imaging while varying SAR, implant angle to B0, and implant position in the RF coil. Temperature rise at implant tips increased linearly with SAR, with larger rises when the implant was parallel to B0. Heating decreased…