Examples of the design of screened and shielded RF receiver coils

Three methods of screening RF surface coil receivers are discussed. The aim is to design coils with very much greater sensitivity on one side than on the other so that signal and noise contributions from unwanted regions of the body can be minimized. These methods can usefully be applied to situations wherein data are only wanted from one leg, although the coil is most conveniently located between the two, or from an arm lying adjacent to the body.