Computer tomography apparatus

Details Computer tomography apparatus Computer tomography apparatus

1987-11-16

1990-04-03

Fields, Carolyn E.

X-ray or gamma ray systems or devices

Specific application

Computerized tomography

378 10, 378137, H01J 3530

Patent

active

049146815

ABSTRACT:
A computer tomography apparatus has an annular anode surrounding a volume in which an examination subject is disposed, a source for generating an electron beam, and a coil through which the electron beam passes which deflects the electron beam so as to be incident on a face of the anode and to orbit the examination subject, thereby causing the examination subject to be irradiated in a measuring field from various directions. A control unit is provided for the coil causing the electron beam to be deflected so as to sweep the anode in both the azimuthal and radial directions. The focus of the electron beam on the anode surface thus describes a wave-shaped path, so that the focus path on the anode is lengthened and the thermal load is reduced.

REFERENCES:
patent: 4130759 (1978-12-01), Haimson
patent: 4135095 (1979-01-01), Watanabe
patent: 4158142 (1979-06-01), Haimson
patent: 4206356 (1980-06-01), Wardley et al.
patent: 4352021 (1982-09-01), Boyd et al.
patent: 4392235 (1983-07-01), Houston
patent: 4631741 (1986-12-01), Rand et al.
patent: 4748650 (1988-05-01), Ammann

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