Radiation device using a beam of charged particles
US4134017A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 5, 1977 |
| Grant date | Jan 9, 1979 |
| Priority date | — |
| Expiry date | Jul 5, 1997 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61N2005/1089
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A beam of charged particles is guided along a path including a looped section between two rectilinear stretches, each of these stretches being provided with focusing and centering means. A holder insertable into the outgoing stretch, ahead of a collimator, carries a target designed to emit photons upon being struck by incident particles. The target holder is linked with a retracting mechanism which also controls a diaphragm in the looped path section to narrow its aperture when the target is in place. A dose-equalizing filter utilized in the latter instance is movable jointly with the target holder out of the path of the exiting beam.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.