Pascal Pawel Stang1, John Mark Pauly1, Greig C. Scott1
1Electrical Engineering, Stanford University, Stanford, CA, USA
Parallel transmit pulse designs demand high-fidelity RF reproduction, even as transmit arrays add substantial complexity to MRI scanner electronics and systems. As channel counts grow, accurate transmit path measurements are needed to verify system performance, maintain patient safety, and ease equipment serviceability. We present a versatile transmit path monitor using an in-line vector RF power sensor connected to a Medusa MRI Console. Our system enables a wide range of performance and diagnostic measurements at relatively low cost. Successful results include measurement of RF forward and reverse power, coil impedance, loading, and tuning, and RF amplifier performance.