Collimator and radiation irradiator
US7397903B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 20, 2003 |
| Grant date | Jul 8, 2008 |
| Priority date | — |
| Expiry date | Nov 20, 2023 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B6/06
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A collimator capable of being reduced in its external size without sacrificing an aperture is to be provided. To this end, the collimator comprises a pair of first plate members which defines a radiation passing aperture by a spacing between respective opposed end faces, a pair of second plate members which respectively overlap the first plate members at least partially so as to block any other radiation than the radiation passing through the aperture, a pair of third plate members which respectively overlap the second plate members at least partially so as to block any other radiation than the radiation passing through the aperture, an adjusting mechanism which adjusts the aperture by moving the pair of first plate members, and a follow-up mechanism which causes the pair of second plate members to move following the pair of first plate members with movement of the first plate members.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.