Reference calibration in photon counting based spectral CT
US9459358B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 11, 2013 |
| Grant date | Oct 4, 2016 |
| Priority date | — |
| Expiry date | May 7, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N23/046
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Calibrating a photon-counting detector can include receiving a reference signal, by circuitry, where the reference signal is measured by a reference detector that measures an output from an X-ray tube. Determining circuitry can then determine, for a detector channel of the photon-counting detector, a mapping between a first true count rate on the detector channel without an object and the reference signal in accordance with a linear relationship between the reference signal and the first true count rate, based on a measured count rate on the detector channel and a predefined relationship between the first true count rate and the measured count rate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.