Radiation filter
US4300055A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 22, 1980 |
| Grant date | Nov 10, 1981 |
| Priority date | — |
| Expiry date | May 22, 2000 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG21K1/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The invention relates to an electron accelerator including an evacuated acceleration tube, a target exposed to the electron beam, an electron absorber following the target in beam direction, a collimator and a compensation body arranged therein centered on the axis of symmetry thereof. In such electron accelerators, used in radiotherapy, the soft radiation component is to be suppressed as much as possible. To this end the invention provides a filter plate made of heavy metal beyond the electron absorber, while the compensation body is made of a material of comparatively low atomic number. The filter plate may be inserted between the electron absorber and the compensation body. The target may be provided on the side of the electron absorber facing the acceleration tube.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.