Radiation diaphragm apparatus and radiotherapy apparatus having the diaphragm apparatus
US7916840B2 · kind B2 · utility
Assignees
Inventor
Key dates
| Filing date | Mar 2, 2006 |
| Grant date | Mar 29, 2011 |
| Priority date | — |
| Expiry date | Mar 2, 2026 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61N5/10
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A radiation diaphragm apparatus, which is adapted to form a radiation field, which is an exposed area of an object to be examined by radiation from a radiation source, comprises a plurality of diaphragm elements which are closely arranged in a first direction and movable along a second direction substantially normal to the first direction and each of which has a hole of a given shape formed to penetrate through it in the first direction, a shaft penetrating through the hole of each of the diaphragm elements, and a wear-resistant surface member coating the shaft. The shaft supports each of the diaphragm elements at a point of contact with the periphery of the hole. The diaphragm elements move along the second direction with support by the shaft.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.