Comparative study of CWO and ZnSe(Te) scintillation detector on the performance of X-ray imaging system

Kwak, Seong Woo; Cho, Gyuseong; Kim, Bong-Hwan; Kim, Insu; Jae, Moo Sung

doi:10.1016/j.nima.2004.08.062

Cited by 9 publications

(4 citation statements)

References 6 publications

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“…There are some physical parameters which are not included in the analytical method. Although optical transport was not modeled, previous studies have shown that optical transport has small impact on the performance of BGO, CWO and CsI within the thickness range investigated in this work (Zhao et al 2004, Kwak et al 2005, Wang et al 2009, Star-Lack et al 2015. The impact of patient scatter on imager signal and subsequently on CNR Au was not considered.…”

Section: Discussionmentioning

confidence: 99%

“…CsI and BGO have been previously studied, as individual detectors, in MV imaging (Wang et al, 2009) as well as in kV (mainly CsI) (Zhao et al, 2004) with good performance across thicknesses ranging from 150 μ m to 4 cm. CWO was also studied for MV (Star-Lack et al, 2015) and kV imaging (Kwak et al, 2005) within a range of thicknesses up to 3 cm.…”

Section: Methodsmentioning

confidence: 99%

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Multi-layer imager design for mega-voltage spectral imaging

Myronakis¹,

Hu²,

Fueglistaller³

et al. 2018

Phys. Med. Biol.

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The architecture of multi-layer imagers (MLIs) can be exploited to provide megavoltage spectral imaging (MVSPI) for specific imaging tasks. In the current work, we investigated bone suppression and gold fiducial contrast enhancement as two clinical tasks which could be improved with spectral imaging. A method based on analytical calculations that enables rapid investigation of MLI component materials and thicknesses was developed and validated against Monte Carlo computations. The figure of merit for task-specific imaging performance was the contrast-to-noise ratio (CNR) of the gold fiducial when the CNR of bone was equal to zero after a weighted subtraction of the signals obtained from each MLI layer. Results demonstrated a sharp increase in the CNR of gold when the build-up component or scintillation materials and thicknesses were modified. The potential for low-cost, prompt implementation of specific modifications (e.g. composition of the build-up component) could accelerate clinical translation of MVSPI.

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Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Multi-layer imager design for mega-voltage spectral imaging

Myronakis¹,

Hu²,

Fueglistaller³

et al. 2018

Phys. Med. Biol.

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show abstract

“…To avoid radiation damage, the photodiode arrays, which detect the optical photons emitted from the scintillator arrays, are placed to the sides of detector arrays, as schematically illustrated in figure 1(a). As a scintillation detector, a CdWO 4 crystal is a good candidate [2] because it shows reasonable properties required for this specific application with respect to density [3], effective atomic number [3], radiation damage [4], and optical transparency [5], although it suffers from low light yield, poor matching with the sensitivity curve of the photodiode, and toxicity [3].…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2016

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“…Their afterglow level after 10 ms is about three orders lower than that of CsI:Tl [3]. Scintillators based on ZnSe crystals are quite acceptable for use in X-ray introscopy detectors because their radiation stability is relatively good and their light output is about four times higher than the oxide scintillators (CdWO 4 , Bi 4 Ge 3 O 12 , Gd 2 SiO 5 ) used for similar purposes [4,5].…”

Section: Introductionmentioning

confidence: 99%