X-ray apparatus including a filter provided with filter elements having an adjustable absorption
US6430265B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 2, 2001 |
| Grant date | Aug 6, 2002 |
| Priority date | — |
| Expiry date | Feb 2, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG21K1/10
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An X-ray apparatus with an X-ray source for producing a beam of X-rays, an X-ray detector for detecting the beam, and an X-ray filter with filter elements. The X-ray filter is arranged between the X-ray source and the X-ray detector to attenuate the X-ray beam in each independent filter element individually. Each filter element can receive a liquid which is electrically conductive and X-ray absorbing, and is supplied via a transport channel, the X-ray absorptivity of each filter element being discretely adjustable by step-wise adjustment of the level of the liquid in each filter element. Each filter element includes a first electrode which is located in the wall of the filter element, on top of a substrate layer for applying an electric potential to the wall of the filter element. A second electric potential is applied to the liquid via a second electrode. Th first electrode is segmented in the longitudinal direction z of the filter element in order to achieve reproducible, step-wise filling of the filter element with the X-ray absorption liquid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.