Peripheral vascular array

An interface for connecting a surface coil array to an NMR scanner, comprising:

• a first number, N, of RF inputs, the RF inputs being arranged to receive signals from the surface coil array;
• an RF switch circuit coupled to the RF inputs, said RF switch circuit having a second number, M, of RF outputs, wherein the RF switch circuit comprises a first plurality of RF switches coupled to the RF inputs, a second plurality of RF combiners coupled to receive outputs from a subset of the first plurality of RF switches, and a third plurality of RF switches coupled to receive outputs from the second plurality of RF combiners;
• and
• a control logic circuit coupled to the RF switch circuit, wherein the control logic circuit receives a coil select signal and controls a state of the first plurality of RF switches and the third plurality of RF switches in response to the coil select signal.