Detective quantum efficiency of photon‐counting x‐ray detectors

Abstract

The CSA approach is extended to describe signal and noise propagation through photoelectric and Compton interactions in SPC detectors, including the effects of escape and reabsorption of emission/scatter photons. High-performance SPC systems can be achieved but only for certain combinations of secondary conversion gain, depth-dependent collection efficiency, electronic noise, and reabsorption characteristics.

A framework for performance characterization of energy‐resolving photon‐counting detectors

“…Several studies have been published on how to model the frequency‐dependent detective quantum efficiency of photon‐counting detectors, but these studies do not take energy information into account. At the same time, the impact of detector nonidealities on spectral imaging tasks has been studied by several authors . However, these publications only study the zero‐spatial‐frequency performance and do not investigate the frequency‐dependent spectral performance.…”

“…At the same time, the impact of detector nonidealities on spectral imaging tasks has been studied by several authors. [21][22][23][24][25][26][27] However, these publications only study the zero-spatial-frequency performance and do not investigate the frequency-dependent spectral performance. Shikhaliev et al 28 studied the effect of characteristic x rays on the spectrum shape and on the spatial resolution.…”

Spatio‐energetic cross‐talk in photon counting detectors: Numerical detector model (PcTK) and workflow for CT image quality assessment

“…It is possible to model Compton scattering by using nested phenomena similar to q = 2 and Ref. [18]. (2) No pulse pileups are modeled.…”

“…The proposed model version 3.2 uses the cascaded parallel systems model 18,19 (Fig. 1) that was used in the previous model version 2.1 17 and each element is identical to version 2.1 except for the second part of Stage 2 in Fig.…”

An efficient computational approach to model statistical correlations in photon counting x‐ray detectors

“…In the literature, different approaches can be found to model a PC detector, including Monte Carlo simulations, 26,27 cascaded system models, [28][29][30] a model specialized in pulse pile-up, 31,32 fitting a parameterized model to measured data, 6 the simulation of induced signals, 33 or a look-up table-based approach. 34 We aim at setting up a PC detector simulation approach being able to generate statistically correct projection data and that is easy and fast to use.…”