Monte Carlo analysis of megavoltage x-ray interaction-induced signal and noise in cadmium tungstate detectors for cargo container inspection

Kim, J.; Park, J.; Kim, D.W.; Yun, Sangwoon; Lim, Chang Hwy; Kim, H.K.

doi:10.1088/1748-0221/11/11/c11021

Cited by 2 publications

(1 citation statement)

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“…Assuming that 𝑔 = ε/𝑊 and 𝑔 2 = 𝜀 2 /𝑊 2 , where 𝑊 is the energy required to generate a single light quantum in a phosphor, we obtain the following relationships between the parameters in eq. (2.3) and the AED moments [12,13].…”

Section: Application Of Mc-aed Analysis To Dqementioning

confidence: 99%

Analysis of absorption signal and noise in thin phosphor detectors for high-energy transmission radiography

Yoo,

Shin,

et al. 2023

J. Inst.

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We investigated the detective quantum efficiency (DQE) of thin gadolinium oxysulfide phosphor-based flat-panel detectors (FPDs) using cascaded-systems analysis and Monte Carlo (MC) simulations for applications in megavoltage (MV) x-ray industrial imaging. We decomposed the DQE formula into (dose-independent) upper-limit DQE and (dose-dependent) DQE-reduction factors. We obtained the absorbed energy distributions (AEDs) for various x-ray detector designs and photon energies using MC simulations and applied the AED analysis to the DQE formula. The investigations examined include the x-ray-detector-only DQE and the effect of the coupling efficiency between the x-ray detector and readout panel, including electronic noise, on the upper-limit DQE. This study confirms that the design of the metal build-up layer on the phosphor is effective for MV imaging and emphasizes the importance of designing the readout panel to maintain the upper-limit DQE. We expect the proposed DQE analysis to be suitable for designing and evaluating FPDs for high-energy nondestructive x-ray testing.

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Section: Application Of Mc-aed Analysis To Dqementioning

confidence: 99%