Systems and methods for improving energy resolution by sub-pixel energy calibration
US9696440B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 20, 2015 |
| Grant date | Jul 4, 2017 |
| Priority date | — |
| Expiry date | Jan 1, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01J2001/442
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A radiation detector assembly is provided including a semiconductor detector, pixelated anodes, and at least one processor. The pixelated anodes are disposed on a surface of the semiconductor detector, and configured to generate a primary signal responsive to reception of a photon and a secondary signal responsive to an induced charge caused by reception of a photon by at least one adjacent anode. The at least one processor is operably coupled to the pixelated anodes, and configured to define sub-pixels for each pixelated anode; acquire primary signals and secondary signals from the pixelated anodes; determine sub-pixel locations for acquisition events using the primary and secondary signals; generate a sub-pixel energy spectrum for each sub-pixel; apply at least one energy calibration parameter to adjust the sub-pixel energy spectra for each pixelated anode; and, for each pixelated anode, combine the adjusted sub-pixel energy spectra to provide a pixelated anode spectrum.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.