Collimator apparatus and method
US4739173A · kind A · utility
75Cited by
6References
22Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 15, 1986 |
| Grant date | Apr 19, 1988 |
| Priority date | — |
| Expiry date | Aug 15, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG21K1/04
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A collimator apparatus (10 or 100) including one or more bundles of nested rods (11, 11a or 101 or 101a or 201) which define a surface (112, 112a) which interferes with a beam of radiation is described. The apparatus particularly uses coil spring (48) between and along the axis (a--a or c--c) of the rods which are compressed by blocks (13, 14, 13a and 14a or 103, 104, 103a and 104a) to lock the rods in position in holes in the blocks. The apparatus is particularly useful for shaping radiation beams for patient treatment.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.