Interventional cardiac MRI using an add‐on parallel transmit MR system: In vivo experience in sheep

We present in vivo testing of a parallel transmit system intended for interventional MR-guided cardiac procedures.The parallel transmit system was connected in-line with a conventional 1.5 Tesla MRI system to transmit and receive on an 8-coil array. The system used a current sensor for real-time feedback to achieve real-time current control by determining coupling and null modes. Experiments were conducted on 4 Charmoise sheep weighing 33.9-45.0...