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A magnet system for nuclear spin resonance spectroscopy, in particular for in-vivo spectroscopy and tomography on a limb or a shoulder of a human body (partial-body tomography) comprising a superconductive magnet coil arrangement having coil sets (2a, 3a; 2b, 3b) arranged at an axial spacing one fro

A magnet system for nuclear spin resonance spectroscopy, in particular for in-vivo spectroscopy and tomography on a limb or a shoulder of a human body (partial-body tomography) comprising a superconductive magnet coil arrangement having coil sets (2a, 3a; 2b, 3b) arranged at an axial spacing one from the other, for generating a static homogeneous magnetic field in an examination volume, and further a coil frame (6) carrying the coil sets and a cryostat intended for cooling the windings, is characterized by the fact that the windings are rigidly interconnected by the coil frame at low temperature and that there is provided a transverse room-temperature access (50) to the examination volume which extends over approximately 180°in circumferential direction, related to the axis (4) of the magnet coil arrangement. This enables examinations to be carried out at ease.

대표청구항 ▼

Magnet system for nuclear spin resonance spectroscopy suitable for in-vivo spectroscopy and tomography on a limb or a shoulder of a human body (partial-body tomography) comprising superconductive magnet coil means, having coil sets (2a, 3a; 2b, 3b) arranged at an axial spacing, one from the other, f

Magnet system for nuclear spin resonance spectroscopy suitable for in-vivo spectroscopy and tomography on a limb or a shoulder of a human body (partial-body tomography) comprising superconductive magnet coil means, having coil sets (2a, 3a; 2b, 3b) arranged at an axial spacing, one from the other, for generating a static homogeneous magnetic field in an examination volume, and a coil frame (6) carrying the coil sets, said examination volume being disposed between said coil sets, said coil frame and coil sets being configured, without structural support between the coil sets over an angle of at least 180°in a circumferential direction, related to the axis (4) of the magnet coil arrangement, for enabling room temperature access (50) to said examination volume in a direction transverse to the axis of the coil sets, for placement of the human limb or shoulder therein, said coil frame (6) having an axial central portion (8) extending not more than 180°in a circumferential direction, related to the axis (4) of the magnet coil arrangement, said magnet system further comprising cryostat means for cooling the coil sets, said cryostat means comprising a first coolant tank (15) for a first coolant having a low temperature, said coolant tank surrounding the coil frame and the coil sets on all sides, said coil sets being rigidly supported by the coil frame (6) and maintained at a cryogenic temperature by the cryostat means, said transverse room temperature access (50) to the examination volume extending at least over approximately 180°in circumferential direction, related to the axis (4) of the magnet coil arrangement, the coil sets having a radially inner and a radially outer winding with a current through the radially inner winding being directed opposite to a current through the radially outer winding.