Apparatus for tuning an nmr field coil

摘要: A coil assembly for radio frequency NMR imaging is designed to resonate at a desired frequency. The includes cylindrical field having pair of conductive end loops disposed in spaced-apart relation along central axis. plurality segments electrically interconnect the periodic points around their periphery. These include reactive elements which cause given magnetic shield about coil. shunts are coupled between different locations periphery and common electrical node, such as shield. Each variable increase or decrease resonant coil, thereby tuning it