Fast, high-rate, position-sensitive absolute dosimeter for ion beam therapy
US9739892B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 9, 2014 |
| Grant date | Aug 22, 2017 |
| Priority date | — |
| Expiry date | Oct 4, 2034 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61N2005/1087
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A gas scintillation detector is designed to provide in-beam absolute dose monitoring for ion beam radiotherapy treatments employing spot or raster beam scanning, especially with microsecond-scale beam pulses. Detection of prompt primary scintillation light emitted by gas molecules excited by beam passage provides electronic signals that can be processed to yield output data proportional to delivered dose up to high dose rates, and that appear quickly enough to provide feedback to influence real-time beam intensity adjustments for subsequent steps in the beam scan. When the scintillation light is collected in multiple photo-detectors, the invention is furthermore capable of measuring spot beam position with spatial resolutions of order one millimeter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.