Real-time gain compensation for photo detectors based on energy peak detection
US8089037B2 · kind B2 · utility
4Cited by
1References
18Claims
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Key dates
| Filing date | Sep 16, 2009 |
| Grant date | Jan 3, 2012 |
| Priority date | — |
| Expiry date | Sep 4, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01T1/1648
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A method, process and apparatus for compensating for changes to the gain of photo detectors in a nuclear imaging apparatus is disclosed. Specifically, embodiments detect positron annihilation event pulses using photo detectors. Changes to the gain of the photo detectors are compensated for by determining the relationship of a detected event pulse peak with a target event pulse peak. Based on the difference between these two peaks, a corrected gain is determined in a closed-loop control system. The corrected gain can be used to compensate for temperature changes that can affect the gain of the photo detectors.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.