Patent ID: 8131340
Filing Date: 2012-03-06
Classification: G01R

Abstract:
1. A detection unit configured for arrangement in a field generation unit of a magnetic resonance apparatus, said detection unit comprising: a radio-frequency transmission/reception system that transmits RF pulses and/or receives magnetic resonance signals, said radio-frequency transmission/reception system being configured to surround a patient tunnel, having a longitudinal tunnel axis, of the field generation unit at a radial distance from the tunnel axis; said radio-frequency transmission/reception system comprising two sub-systems spaced apart from each other along a direction of said tunnel axis and forming a substantially annular interstice between said two sub-systems; and a radio-frequency shield that radially outwardly shields said radio-frequency transmission/reception system, said radio-frequency shield comprising two sub-system shield segments and an interstice shield segment disposed successively along said direction of said tunnel axis, said sub-system shield segments respectively covering said sub-systems of said radio-frequency transmission/reception system and said interstice shield segment at least partially covering said interstice in said radio-frequency transmission/reception system, said interstice shield segment adjoining said sub-system shield segments in a radio-frequency-tight configuration along said direction of said tunnel axis, and said radio-frequency shield comprising two rings extending in a radial direction relative to said tunnel axis, said two rings respectively having radially outer ends that respectively adjoin ends of the sub-system shield segments axially facing toward each other along said tunnel axis.