X-ray tube having an internal radiation shield

Details X-ray tube having an internal radiation shield X-ray tube having an internal radiation shield

2003-04-09

2008-12-16

Ho, Allen C. (Department: 2882)

X-ray or gamma ray systems or devices

Source

Electron tube

C378S121000, C378S203000

Reexamination Certificate

active

07466799

ABSTRACT:
A shielding disk for managing x-ray emission form a stationary anode x-ray tube is disclosed. The stationary anode x-ray tube includes an anode housing and a stainless steel can that together form an evacuated enclosure and respectively contain a stationary anode and a cathode assembly. The shielding disk, comprised of tungsten, is interposed between the anode housing and the can, and is formed with a region, such as a hole, formed through a central portion thereof. During tube operation, electrons pass through the shielding disk hole to impact a target surface on the anode and produce x-rays. Those x-rays that do not pass through a window defined in the anode housing to exit the tube but instead emanate toward the can, are intercepted and absorbed by the shielding disk before entering the can. This results in a reduced need for lead shielding disposed about external surfaces of the x-ray tube.

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