A method, system, and medium for energy calibration of a photon counting detector
By acquiring the S-curve of the photon counting detector under different tube voltages, and using benchmark pixel calibration and fitting to calculate the calibration coefficient, the problems of ASIC chip channel differences and crystal defects in the energy calibration of photon counting CT detectors were solved, thus simplifying and stabilizing the energy calibration process and improving the accuracy and repeatability of image reconstruction.
Patent Information
- Application Number
- CN202611005094.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-07-07
- Publication Date
- 2026-08-04
AI Technical Summary
Existing energy calibration methods for photon-counting CT detectors cannot effectively eliminate the effects of differences between ASIC chip channels and detector crystal defects, resulting in nonlinear energy response, which affects the accuracy and repeatability of image reconstruction. Furthermore, existing calibration methods are time-consuming and have poor environmental adaptability.
By acquiring the S-curve of the photon counting detector under different tube voltages, and through reference pixel calibration and fitting, the first and second calibration coefficients are calculated to obtain the energy calibration formula for each pixel, thereby eliminating the influence of ASIC and achieving consistency in the response of each pixel.
The energy calibration process was simplified, the energy calibration stability and response consistency of the detector were improved, systematic errors were reduced, and the accuracy and repeatability of image reconstruction were ensured.