Real-time SAR Supervision for a 32-channel RF Transmit System with Virtual Observation Points

Motivation: Real-time local SAR supervision is a major obstacle in pTx system especially since the computational demand scales proportionally with the number of RF channels. Goal(s): To develop a safety supervision that monitors 32 transmit channels phase sensitive and perform local SAR calculation with a higher number of VOPs. Approach: Directional couplers are placed in the transmit path, digitizers sample the RF signal, and a GPU performs the local SAR calculation. Results: This study demonstrates real-time RF supervision for a 32-channel pTx transmit system with local SAR calculation using 600 VOPs on a single GPU. Impact: This study demonstrates real-time RF supervision for a 32-channel pTx transmit system with single-GPU-based local SAR calculation using 600 virtual observation points.