William J. O'Reilly1, Paul K. Jackson2, Andrzej Jesmanowicz3
1Mercury Computer Systems, Inc, Chelmsford, MA, USA; 2Mercury Computer Systems, Inc, Reston, VA, USA; 3Biophysics, Medical College of Wisconsin, Milwaukee, WI, USA
A procedure is described to develop a simple method of achieving the best signal-to-noise ratio for a coil-amplifier system. The method uses a remote adjustment of coil impedance under load inside the magnet without the need of using a network analyzer. The specialized graphical display was created to simplify the procedure and minimize the time to measure results. Four different preamplifiers were tested on a 3T scanner with a single surface coil.