Performance Estimate of MPPC-based PC-CT System and Initial Results of CT Image Contrast

D. Sato, M. Arimoto, K. Yoshiura, T. Mizuno, K. Aiga, H. Kawashima, S. Kobayashi, J. Kataoka, T. Toyoda, M. Sagisaka, H. Ikeda, S. Terazawa, S. Shiota

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Abstract

    X-ray computed tomography (CT) is widely used for three-dimensional nondestructive X-ray imaging of the internal structure of the human body or industrial materials. For modern technology in the medical field, dual-energy CT (DE-CT) with two types of X-ray effective energy has generally been used. However, the X-ray signals of DE-CT are integrated and read out in the form of a current. Thus, contamination with dark noise significantly degrades such imaging qualities as contrast, which causes a large radiation dose to patients. In addition, little energy information on DE-CT results in poor material discrimination of target materials. Recently, the photon-counting CT (PC-CT) system has developed for future CT technology. Because the PC-CT system can detect individual X-ray photons, the dark-noise effect expected to be highly suppressed. The multiple energy data obtained by PC-CT provide fruitful information on the energy dependence of the CT values, leading to high potential for material discrimination. Thus, an MPPC-based PC-CT system combined with high-speed scintillators has been proposed, and a 64-channel CT array system was developed recently. In this study, the details of the performance estimate of the MPPC-based PC-CT system were investigated in terms of energy information and photon-counting capability. The initial results of the CT image contrast compared with the clinical DE-CT system are presented. They show that the proposed PC-CT system achieved a similar contrast-to-noise ratio value to that of the clinical DE-CT.

    Original languageEnglish
    Title of host publication2021 IEEE Nuclear Science Symposium and Medical Imaging Conference Record, NSS/MIC 2021 and 28th International Symposium on Room-Temperature Semiconductor Detectors, RTSD 2022
    EditorsHideki Tomita, Tatsuya Nakamura
    PublisherInstitute of Electrical and Electronics Engineers Inc.
    ISBN (Electronic)9781665421133
    DOIs
    Publication statusPublished - 2021
    Event2021 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2021 - Virtual, Yokohama, Japan
    Duration: 2021 Oct 162021 Oct 23

    Publication series

    Name2021 IEEE Nuclear Science Symposium and Medical Imaging Conference Record, NSS/MIC 2021 and 28th International Symposium on Room-Temperature Semiconductor Detectors, RTSD 2022

    Conference

    Conference2021 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2021
    Country/TerritoryJapan
    CityVirtual, Yokohama
    Period21/10/1621/10/23

    Keywords

    • Dual-energy CT
    • MPPC
    • Photon-counting CT

    ASJC Scopus subject areas

    • Nuclear Energy and Engineering
    • Health Informatics
    • Radiology Nuclear Medicine and imaging
    • Nuclear and High Energy Physics

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