Electron Density and Effective Atomic Number Measurement by Using a Newly Developing Photon Counting CT System

We developed the photon counting CT system by using a conventional laboratory X-ray source and a CdTe line sensor. Attenuation coefficients were obtained from the measured CT image data. Our suggested method for deriving the electron density and effective atomic number from the measured attenuation...

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Bibliographic Details
Published inAdvanced engineering forum Vol. 38; pp. 93 - 99
Main Authors Harasawa, Yosuke, Ohno, Yumiko, Suzuki, Kosuke, Zhang, Kun, Hoshi, Kazushi, Ono, Daiki, Sakurai, Hiroshi, Sunaguchi, Naoki, Torikoshi, Masami, Nagao, Akie
Format Journal Article
LanguageEnglish
Published Zurich Trans Tech Publications Ltd 01.11.2020
Subjects
Atomic properties
Attenuation coefficients
Computed tomography
Electron density
Electrons
Photons
Response functions
X ray sources
X ray spectra
Photon Counting CT
Electron Density
Radiotherapy
Effective Atomic Number
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Summary:We developed the photon counting CT system by using a conventional laboratory X-ray source and a CdTe line sensor. Attenuation coefficients were obtained from the measured CT image data. Our suggested method for deriving the electron density and effective atomic number from the measured attenuation coefficients was tested experimentally. The accuracy of the electron densities and effective atomic numbers are about <5 % (the averages of absolute values are 2.6 % and 3.1 %, respectively) for material of 6< Z and Zeff <13. Our suggested simple method, in which we do not need the exact source X-ray spectrum and detector response function, achieves comparable accuracy to the previous reports.
ISBN:9783035716146
3035716145
ISSN:2234-9898
2234-991X
2234-991X
DOI:10.4028/www.scientific.net/AEF.38.93