Industrial gamma computed tomography using high aspect ratio scintillator detectors (A Geant4 simulation)

Askari, Mojtaba; Taheri, Ali; Larijani, M. M.; Amir, Mohammad

doi:10.1016/j.nima.2019.01.039

Cited by 13 publications

(12 citation statements)

References 23 publications

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“…These diameters were selected depending on the size of the standard 1-inch and 2-inch photomultipliers (PMTs). The other reason for choosing a 5 cm diameter and 50 cm length detector was to compare the results with the output of the NaI (Tl) scintillation detector with the same size as previously simulated [22]. Although, the longer the detector, the bigger objects can be scanned.…”

Section: Rod Detectormentioning

confidence: 99%

“…As a result, the output signals of the PMTs, S 1 , and S 2 , could be obtained using eqs. (2.1) and (2.2) as follows [22]:…”

Section: Rod Detectormentioning

confidence: 99%

“…We also suggested an entirely new industrial tomography system in 2019 [17,22,23] based on using rod shaped scintillators. It was shown that this type of scintillator is inherently positionsensitive and can be employed as linear detectors for gamma/x-ray imaging and tomography purposes.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Monte Carlo study of plastic rod scintillators for use in industrial computed tomography

Taheri¹,

Askari²

2022

J. Inst.

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Industrial gamma-ray computed tomography systems have found different applications and have become an important tool for non-destructive testing. In this work, high aspect ratio rod plastic scintillators were assessed for use in this type of tomography system. All analyses were performed using Monte Carlo simulation by geant4 toolkit. Validation of the results was done using a 50 cm rod plastic scintillator with a diameter of 5 cm. The results showed that the rod plastic scintillators can be employed in industrial tomography systems for scanning large objects. The spatial resolution of the detection system was estimated more than 1 cm. Finally, the simulated parameters of the selected rod plastic scintillator were compared with an identical NaI(Tl) rod scintillator to find a better understanding about its performance.

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Section: Rod Detectormentioning

confidence: 99%

“…As a result, the output signals of the PMTs, S 1 , and S 2 , could be obtained using eqs. (2.1) and (2.2) as follows [22]:…”

Section: Rod Detectormentioning

confidence: 99%

See 1 more Smart Citation

Monte Carlo study of plastic rod scintillators for use in industrial computed tomography

Taheri¹,

Askari²

2022

J. Inst.

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“…The components of computed tomography systems are very expensive; therefore, to assess the possibility of solving computed tomography design problems for specific test objects, it is effective to use computational experiments [13][14][15][16]. The simplest scanning scheme in computed tomography is the geometry of a narrow parallel beam [12].…”

Section: Introductionmentioning

confidence: 99%

Calculation Model of X-Ray Computed Tomography with Density Assessment Function

Osipov

Yadrenkin

Чахлов

et al. 2021

Russ J Nondestruct Test

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Abstract— A calculation model of X-ray computed tomography with a density assessment function in the geometry of a parallel beam has been proposed. The model includes blocks for simulating and correcting sinograms and reconstructing section images. When generating sinograms, the parameters of the test object, source, and recorder of X-ray radiation have been taken into account. Modeling algorithms are implemented in the MathCad system and tested on virtual test objects.

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“…Therefore, the contribution of a pixel to the weight matrix varies with projection [30]. Classical analytical approaches to weight matrix generation include a line length and a strip-area model [33][34][35]. In the line length model, the weight matrix is the beam intersection length in the pixel and in the strip area model, it is the intersection area divided by the beam width.…”

Section: Introductionmentioning

confidence: 99%

Algebraic reconstruction technique combined with Monte Carlo method for weight matrix calculation in gamma ray transmission tomography

et al. 2019

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In the present work, the algebraic reconstruction technique (ART) combined with Monte Carlo method has been proposed for image reconstruction in gamma ray transmission tomography, which is generally used for the nondestructive assay of special nuclear materials. The Monte Carlo method has been explored to generate the weight matrix, which is required for executing ART algorithm. The method has been successfully demonstrated using a two-dimensional tomographic set-up with circular sample. The advantage of the method is that it is generalized, with no assumptions regarding weight matrices and is easily extendable to three dimensional systems, where other classical approaches become cumbersome. Moreover, the method is computationally simple and less time consuming unlike full scale Monte Carlo simulations.

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Industrial gamma computed tomography using high aspect ratio scintillator detectors (A Geant4 simulation)

Cited by 13 publications

References 23 publications

Monte Carlo study of plastic rod scintillators for use in industrial computed tomography

Monte Carlo study of plastic rod scintillators for use in industrial computed tomography

Calculation Model of X-Ray Computed Tomography with Density Assessment Function

Algebraic reconstruction technique combined with Monte Carlo method for weight matrix calculation in gamma ray transmission tomography

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