Patent ID: 6429656
Filing Date: 2002-08-06
Classification: G01R

Abstract:
A polarizing antenna for a magnetic resonance apparatus comprising:a plurality of longitudinal conductors, said plurality being selected from the group consisting of two and multiples of two, proceding along a longitudinal axis and being equidistantly spaced from each other; a plurality of end rings respectively disposed along said longitudinal conductors and proceeding substantially transverally to said longitudinal conductors, said plurality of end rings including switchable end rings; and a switch arrangement for selectively electrically coupling at least one of said switchable end rings to said longitudinal conductors to vary an irradiatable imaging volume defined by said at least one of said switchable end rings and one other end ring in said plurality of end rings, and respective lengths of said longitudinal conductors between said at least one switchable end ring and said one other of said end rings.