Matteo Pavan1, Klaas Paul Pruessmann1
1ETH Zurich, Zurich, Switzerland
In MR measurement, coils are detecting proton signal; they are usually connected through a matching network to very low noise amplifier. The Noise Figure of the amplifier depends on the impedance that its input port sees. To optimize SNR, is important to match this impedance to the one that is reducing at the minimum the noise figure. A new approach for automatic impedance measurement is here presented. This new approach is easy and modular in such a way that it can be scaled to any number of reception channels.