Therapy tomograph

Details Therapy tomograph Therapy tomograph

1994-06-09

1995-07-11

Cohen, Lee S.

Surgery

Truss

Pad

324307, 324318, A61B 5055

Patent

active

054311640

ABSTRACT:
In an NMR tomography apparatus with a superconducting main-field coil comprising two partial coil systems which are rotationally symmetric about a horizontal central z axis and are arranged mirror-symmetrically with respect to a vertical transverse middle plane E.sub.q and which are accommodated within a two-part cryostat which is symmetric with respect to the transverse middle plane E.sub.q and which comprises two slice-like partial cryostats which are connected to each other through strut-like connecting elements (8) of length g running largely parallel to the central axis z to form the entire cryostat and which exhibit a room temperature bore of diameter d.sub.B running symmetrically about the central z axis, whereby 1.6 g.ltoreq.d.sub.B 2.1 g, precisely three vertical connecting elements (8) are provided for which are arranged asymmetrically with respect to a vertical longitudinal middle plane E.sub.1 and assume angular positions in the ranges 50.degree. to 100.degree., 180.degree. to 230.degree. an 320.degree. to 10.degree., whereby the angular difference of the positions of two neighboring connecting elements (8) is not larger than 180.degree.. In this fashion, the transverse access to the patient bore of the configuration can be utilized by a therapist for the treatment of patients during the operation of the tomography apparatus without encroaching upon the mechanical stability of the cryostat.

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patent: 4733190 (1988-03-01), Dembinski
patent: 4817612 (1989-04-01), Akins et al.
patent: 4829252 (1989-05-01), Kaufman
patent: 4862086 (1989-08-01), Maeda
patent: 4875485 (1989-10-01), Matsutani
patent: 4985678 (1991-01-01), Gangarosa et al.
patent: 5109198 (1992-04-01), Murakami et al.

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