Apparatus and method for angular response calibration of photon-counting detectors in sparse spectral computed tomography imaging
US9020092B2 · kind B2 · utility
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Key dates
| Filing date | Feb 19, 2013 |
| Grant date | Apr 28, 2015 |
| Priority date | — |
| Expiry date | Nov 24, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T11/005
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A method for detector angular response calibration in computed-tomography (CT) comprising capturing incident X-ray photons, emitted from an X-ray source, via a plurality of energy-discriminating detectors, determining photon counts of the captured incident X-ray photons in a plurality of energy windows at each energy-discriminating detector, and adjusting the photon counts based on a pre-determined detector angular response calibration look-up table for a given view for each energy-discriminating detector at each energy window.
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