System and method for photographic determination of multichannel collimator channel pointing directions
US9622714B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 8, 2011 |
| Grant date | Apr 18, 2017 |
| Priority date | — |
| Expiry date | Aug 29, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2207/10108
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A system and method are disclosed for obtaining pointing directions for every channel of a collimator which can then be used during the image reconstruction process to more accurately estimate the direction from which radiation has been received. The disclosed system and method provide for photographic measurement and analysis of individual collimator channel to determine the pointing directions for every channel in the collimator. This information is obtained by photographing the front and back sides of the collimator, and analyzing the digital image data to obtain the pointing angle of each channel. The resulting information, referred to as a “vector map” is included in the firmware of the collimator so that it can be called on during the projection and back-projection steps of the algorithm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.