Method for the determination of electron density from multi-energy X-ray CT

Doniyor Jumanazarov; Asalkhon Alimova; Shukurulloh Kh Ismoilov; Farruh Atamurotov; Azamat Abdikarimov; Ulrik L. Olsen

doi:10.1016/j.ndteint.2024.103105

Method for the determination of electron density from multi-energy X-ray CT

Doniyor Jumanazarov^*, Asalkhon Alimova, Shukurulloh Kh Ismoilov, Farruh Atamurotov, Azamat Abdikarimov, Ulrik L. Olsen

^*Corresponding author for this work

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Abstract

We propose a method for estimation of material's electron density parameter (ρ_e) using multi-energy x-ray Computed Tomography (CT). Multi-energy CT uses a photon counting detector (PCD) to measure a material's linear attenuation coefficient (LAC) at multiple energies with the simultaneous data acquisition. The physical effects in the PCD such as charge sharing and photon pileup result in spectral distortions of the energy spectrum. Corrects for such distortions are performed with a correction algorithm. A custom laboratory instrument for multi-energy CT is used to experimentally validate the method. The identification efficiency is evaluated for different numbers of energy channels. When using 15 energy channels without inter-gaps the method gives a relative deviation of 1.8% for estimation of ρ_e, for materials in the range of 0.43≤ρ_e≤1.06e⁻mol/cm³.

Original language	English
Article number	103105
Journal	NDT and E International
Volume	145
Number of pages	7
ISSN	0963-8695
DOIs	https://doi.org/10.1016/j.ndteint.2024.103105
Publication status	Published - 2024

Keywords

Data processing methods
Multi-energy X-ray CT
Photon counting detectors
Quantitative X-ray characterization
Security screening

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title = "Method for the determination of electron density from multi-energy X-ray CT",

abstract = "We propose a method for estimation of material's electron density parameter (ρe) using multi-energy x-ray Computed Tomography (CT). Multi-energy CT uses a photon counting detector (PCD) to measure a material's linear attenuation coefficient (LAC) at multiple energies with the simultaneous data acquisition. The physical effects in the PCD such as charge sharing and photon pileup result in spectral distortions of the energy spectrum. Corrects for such distortions are performed with a correction algorithm. A custom laboratory instrument for multi-energy CT is used to experimentally validate the method. The identification efficiency is evaluated for different numbers of energy channels. When using 15 energy channels without inter-gaps the method gives a relative deviation of 1.8% for estimation of ρe, for materials in the range of 0.43≤ρe≤1.06e−mol/cm3.",

keywords = "Data processing methods, Multi-energy X-ray CT, Photon counting detectors, Quantitative X-ray characterization, Security screening",

author = "Doniyor Jumanazarov and Asalkhon Alimova and Ismoilov, {Shukurulloh Kh} and Farruh Atamurotov and Azamat Abdikarimov and Olsen, {Ulrik L.}",

note = "Publisher Copyright: {\textcopyright} 2024 The Author(s)",

year = "2024",

doi = "10.1016/j.ndteint.2024.103105",

language = "English",

volume = "145",

journal = "NDT and E International",

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TY - JOUR

T1 - Method for the determination of electron density from multi-energy X-ray CT

AU - Jumanazarov, Doniyor

AU - Alimova, Asalkhon

AU - Ismoilov, Shukurulloh Kh

AU - Atamurotov, Farruh

AU - Abdikarimov, Azamat

AU - Olsen, Ulrik L.

PY - 2024

Y1 - 2024

N2 - We propose a method for estimation of material's electron density parameter (ρe) using multi-energy x-ray Computed Tomography (CT). Multi-energy CT uses a photon counting detector (PCD) to measure a material's linear attenuation coefficient (LAC) at multiple energies with the simultaneous data acquisition. The physical effects in the PCD such as charge sharing and photon pileup result in spectral distortions of the energy spectrum. Corrects for such distortions are performed with a correction algorithm. A custom laboratory instrument for multi-energy CT is used to experimentally validate the method. The identification efficiency is evaluated for different numbers of energy channels. When using 15 energy channels without inter-gaps the method gives a relative deviation of 1.8% for estimation of ρe, for materials in the range of 0.43≤ρe≤1.06e−mol/cm3.

AB - We propose a method for estimation of material's electron density parameter (ρe) using multi-energy x-ray Computed Tomography (CT). Multi-energy CT uses a photon counting detector (PCD) to measure a material's linear attenuation coefficient (LAC) at multiple energies with the simultaneous data acquisition. The physical effects in the PCD such as charge sharing and photon pileup result in spectral distortions of the energy spectrum. Corrects for such distortions are performed with a correction algorithm. A custom laboratory instrument for multi-energy CT is used to experimentally validate the method. The identification efficiency is evaluated for different numbers of energy channels. When using 15 energy channels without inter-gaps the method gives a relative deviation of 1.8% for estimation of ρe, for materials in the range of 0.43≤ρe≤1.06e−mol/cm3.

KW - Data processing methods

KW - Multi-energy X-ray CT

KW - Photon counting detectors

KW - Quantitative X-ray characterization

KW - Security screening

U2 - 10.1016/j.ndteint.2024.103105

DO - 10.1016/j.ndteint.2024.103105

M3 - Journal article

AN - SCOPUS:85190308349

SN - 0963-8695

VL - 145

JO - NDT and E International

JF - NDT and E International

M1 - 103105

ER -

Method for the determination of electron density from multi-energy X-ray CT

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Keywords

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