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

Osipov, S. P.; Yadrenkin, I. G.; Чахлов, С. В.; Osipov, O. S.; Usachev, E. Yu.; Manushkin, A. A.

doi:10.1134/s1061830921030049

Cited by 8 publications

(1 citation statement)

References 37 publications

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“…Let the set S be a combination of all points of detection with (y,z) coordinates. The test specimen s shadow belongs to set S. The XCT formation of the projection system is based on the approach proposed in [19,29]. The X-ray intensity I with the maximum energy Emax is recorded by a scintillation detector of hsc thickness at the point (y,z) and is associated with the parameters of the test specimen turned around the axis of rotation to θ angle:…”

Section: Xct Projection Formation and Reconstructionmentioning

confidence: 99%

Algorithm of Estimation of the Degree of Porosity Homogeneity of Foamed Concretes by Local Volumes by X-ray Computed Tomography Method

Osipov

Prischepa

2023

Materials

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X-ray CT is widely used to study the structure of foam concrete, the quality of which depends on the uniformity in porosity in local volumes (LV) of the samples. The purpose of this work is to substantiate the need to assess the degree of homogeneity of samples in terms of porosity according to LV. To achieve the goal, an appropriate algorithm has been developed and programmed in MathCad. To illustrate the capabilities of the algorithm, foam concrete modified with fly ash and thermally modified peat (TMP) was tested by CT. The information obtained by CT was processed by the proposed algorithm with variations in LV dimensions in order to estimate the distributions of mean values and standard deviations of porosity. Based on the data obtained, a conclusion was made about the high quality of foam concrete with TMP. The proposed algorithm can be used at the stage of improving the technologies for the production of high-quality foam concretes and other porous materials.

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Section: Xct Projection Formation and Reconstructionmentioning

confidence: 99%

Algorithm of Estimation of the Degree of Porosity Homogeneity of Foamed Concretes by Local Volumes by X-ray Computed Tomography Method

Osipov

Prischepa

2023

Materials

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Adaptive Weighted Bregman Huber Total Variation Method for Terahertz Computed Tomography

Cha,

Li,

Lai

2024

Micro & Optical Tech Letters

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To improve the image quality of terahertz (THz) continuous wave (CW) computed tomography (CT) under sparse‐view projections, a sparse‐view adaptive‐weighted Bregman Huber total variation (AW‐BHTV) method is proposed and experimentally evaluated at 0.11 THz. The Huber function is served as the fidelity term and TV function is worked for the regularization term, optimized by the adaptive weights, incorporating with iterative algorithms containing the modified simultaneous algebraic reconstruction technique (MSART) and the iterative filtered back‐projection (FBP). Sparse‐view reconstruction experiments are carefully implemented via polystyrene (PS) foam samples: Sample 1 and Sample 2, respectively. Under 20 projection angles by MSART based AW‐BHTV, the values of rooted mean‐square‐error (RMSE), peak signal‐to‐noise ratio (PSNR), structure similarity (SSIM) and feature similarity (FSIM) are 0.0061, 22.1427, 0.8738 and 0.9902 for Sample 1 together with 0.0051, 22.9101, 0.8376 and 0.9885 for Sample 2 separately. All of the results above suggest that the proposed AW‐BHTV method can effectively protect image details and strengthen image quality in sparse‐view THz CW CT.

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High specific surface area (2840.3 m2/g) in activated carbon/SnFe2O4 spinel nanocomposite: structural, optical, dielectric, and magnetic properties for Li-ion battery soft and porous electrode applications

Sedaghati-Jamalabad,

Bagheri-Mohagheghi

2024

Appl. Phys. A

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

Cited by 8 publications

References 37 publications

Algorithm of Estimation of the Degree of Porosity Homogeneity of Foamed Concretes by Local Volumes by X-ray Computed Tomography Method

Algorithm of Estimation of the Degree of Porosity Homogeneity of Foamed Concretes by Local Volumes by X-ray Computed Tomography Method

Adaptive Weighted Bregman Huber Total Variation Method for Terahertz Computed Tomography

High specific surface area (2840.3 m2/g) in activated carbon/SnFe2O4 spinel nanocomposite: structural, optical, dielectric, and magnetic properties for Li-ion battery soft and porous electrode applications

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