Efficient method for radiochromic film dosimetry
US9268029B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 1, 2013 |
| Grant date | Feb 23, 2016 |
| Priority date | — |
| Expiry date | Mar 1, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01T7/005
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
The present invention provides a method for measuring a two-dimensional distribution of ionizing radiation doses with high spatial resolution. The method comprises exposing radiation sensitive film to a pattern of ionizing radiation to form a measurement film, exposing areas of radiation sensitive film to a plurality of known doses of the ionizing radiation to form a calibration film(s), scanning all the exposed films together with an unexposed radiation sensitive film at a single time to produce a digital image, measuring those areas of the digital image corresponding to the unexposed film and the calibration film(s) exposed to different known doses, associating the measured responses in the areas to the known doses and using the association to convert the values in the scanned image corresponding to the measurement film from scanner response values to dose values. In a preferred embodiment, all of the radiation sensitive films are the same type of film.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.