Rotary cathode x-ray tube equipment

Details Rotary cathode x-ray tube equipment Rotary cathode x-ray tube equipment

1995-09-21

1997-01-07

Wong, Don

X-ray or gamma ray systems or devices

Source

Electron tube

378134, 378 4, H01J 3504

Patent

active

055925260

ABSTRACT:
The rotary cathode X-ray tube equipment of the present invention is constructed so as to permit radiation of X-ray from all directions with respect to the whole circumference of a subject, and is used for x-ray CT. The equipment of the invention is constructed to prevent an X-ray radiation window 40 of a low strength from being influenced by atmospheric deformations of a vacuum vessel 1 or by machining and assembling errors, for example by using a joint portion disposed between the X-ray radiation window and an inner ring and having both a surface perpendicular to a rotational axis of a rotary member and a cylindrical surface parallel to the rotational axis, a face seal formed on the surface of the joint portion perpendicular to the rotational axis, and an axial seal formed on the cylindrical surface of the joint portion parallel to the rotational axis.

REFERENCES:
patent: 4099059 (1978-07-01), Distler
patent: 5090048 (1992-02-01), Blake
patent: 5268955 (1993-12-01), Burke et al.
patent: 5305363 (1994-04-01), Burke et al.
patent: 5481585 (1996-01-01), Kimura et al.

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