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Energy response calibration of photon-counting detectors using x-ray fluorescence: A feasibility study

  • Author(s): Cho, HM
  • Ding, H
  • Ziemer, BP
  • Molloi, S
  • et al.
Abstract

Accurate energy calibration is critical for the application of energy-resolved photon-counting detectors in spectral imaging. The aim of this study is to investigate the feasibility of energy response calibration and characterization of a photon-counting detector using x-ray fluorescence. A comprehensive Monte Carlo simulation study was performed using Geant4 Application for Tomographic Emission (GATE) to investigate the optimal technique for x-ray fluorescence calibration. Simulations were conducted using a 100 kVp tungsten-anode spectra with 2.7 mm Al filter for a single pixel cadmium telluride (CdTe) detector with 3 × 3 mm2in detection area. The angular dependence of x-ray fluorescence and scatter background was investigated by varying the detection angle from 20.

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