Portal imaging using modulated treatment beam
US7298820B2 · kind B2 · utility
16Cited by
8References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 31, 2006 |
| Grant date | Nov 20, 2007 |
| Priority date | — |
| Expiry date | Jun 9, 2026 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61N2005/1054
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A radiation therapy system produces a treatment beam that is detected by an electronic portal imaging device (EPID) after it passes through the subject being treated. A chopper wheel modulates low energy components of the beam while leaving the higher energy components substantially unmodulated. Modulated components in the image signals produced by the EPID are detected and used to produce portal images.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.