X-ray tube having an internal radiation shield
US7466799B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 9, 2003 |
| Grant date | Dec 16, 2008 |
| Priority date | — |
| Expiry date | Apr 9, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J2235/166
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.