A geometrical approach to rapidly evaluate and optimize pTx transmission vectors for imaging and RF safety of implants

A simple geometrical approach is presented to rapidly calculate safe pTx excitation vectors for implants, while further optimizing imaging performance. The proposed approach does not require any additional imaging protocols to be performed and pTx vector optimizations can be calculated solely e.g. based on low-cost sensors embedded in implants. The methodology was tested on a custom-built sensor-equipped wireless implant in 3T MRI experiments and realistic DBS lead configurations.