Radiotherapeutic apparatus
US7961843B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 27, 2006 |
| Grant date | Jun 14, 2011 |
| Priority date | — |
| Expiry date | Aug 4, 2026 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61N5/1042
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A radiotherapeutic apparatus comprises a source able to emit a beam of therapeutic radiation along a beam axis, a multi-leaf collimator arranged to collimate the beam to a desired shape, wherein the source is rotatable about a rotation axis that is substantially orthogonal and intersects with the beam axis thereby to describe an arc around that axis, and further comprises a control means able to control the dose/time rate of the source, the rotation speed of the source, and the multi-leaf collimator position. The control means is arranged to control the source in accordance with a treatment plan over first and second arc-segments such that at least the multi-leaf collimator changes shape at a different rate per degree in the second arc-segment as to the first arc-segment.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.