X-ray detector
US4031396A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 26, 1975 |
| Grant date | Jun 21, 1977 |
| Priority date | — |
| Expiry date | Sep 26, 1995 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01T1/2935
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An ionization chamber for use in determining the spatial distribution of x-ray photons in tomography systems comprises a plurality of substantially parallel, planar anodes separated by parallel, planar cathodes and enclosed in a gas of high atomic weight at a pressure from approximately 10 atmospheres to approximately 50 atmospheres. The cathode and anode structures comprise metals which are substantially opaque to x-ray radiation and thereby tend to reduce the resolution limiting effects of x-ray fluoresence in the gas. In another embodiment of the invention the anodes comprise parallel conductive bars disposed between two planar cathodes. Guard rings eliminate surface leakage currents between adjacent electrodes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.