Radiotherapeutic apparatus
US7763865B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 29, 2005 |
| Grant date | Jul 27, 2010 |
| Priority date | — |
| Expiry date | Apr 11, 2027 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61N2005/1056
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The present invention therefore provides a method of treating the surface of an item for a radiotherapy apparatus, comprising the steps of machining into a planar reflective surface of the item a stepped profile, each step having a first surface angled to the planar reflective surface such that, in use, the first surface reflects light incident on the planar reflective surface away from the isocenter of the radiotherapy apparatus and a second surface angled with respect to the planar reflective surface and the first surface such that, in use, the second surface is shadowed from light incident on the planar reflective surface by the first surface, the steps having a depth which does not exceed 2.15% of the total depth of the item.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.