X-ray or gamma ray systems or devices – Specific application – Computerized tomography
Patent
1988-04-18
1989-09-12
Church, Craig E.
X-ray or gamma ray systems or devices
Specific application
Computerized tomography
378199, G01N 2300
Patent
active
048667439
ABSTRACT:
A computer tomography apparatus has a stationary part in which a live ring is rotatably seated, the live ring carrying heat generating components such as an x-ray source and a radiation detector, which are disposed on opposite sides of an opening in which an examination subject is received. The stationary part and the live ring limit a sealed annular channel therebetween, the channel having at least one inlet opening and at least one outlet opening for a gaseous coolant. A conduit, which also contains a circulating coolant, has various portions disposed to carry away heat from the heat generating components, and another portion disposed within the annular channel so that the heat can be removed therefrom by the gaseous coolant. The outlet opening and the inlet opening of the channel are connected to form a closed circulation loop for the coolant flowing in the annular channel, with a heat exchanger being disposed between the inlet and the outlet through which the channel coolant, as well as an additional coolant, flow. The closed circulation system avoids air drafts which are undesireable for hygeinic reasons.
REFERENCES:
patent: 4651338 (1987-03-01), Hahn
patent: 4709559 (1987-12-01), Dotzauer
Church Craig E.
Siemens Aktiengesellschaft
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