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

    研究成果: Conference contribution

    抄録

    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.

    本文言語English
    ホスト出版物のタイトル2021 IEEE Nuclear Science Symposium and Medical Imaging Conference Record, NSS/MIC 2021 and 28th International Symposium on Room-Temperature Semiconductor Detectors, RTSD 2022
    編集者Hideki Tomita, Tatsuya Nakamura
    出版社Institute of Electrical and Electronics Engineers Inc.
    ISBN(電子版)9781665421133
    DOI
    出版ステータスPublished - 2021
    イベント2021 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2021 - Virtual, Yokohama, Japan
    継続期間: 2021 10月 162021 10月 23

    出版物シリーズ

    名前2021 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
    国/地域Japan
    CityVirtual, Yokohama
    Period21/10/1621/10/23

    ASJC Scopus subject areas

    • 原子力エネルギーおよび原子力工学
    • 健康情報学
    • 放射線学、核医学およびイメージング
    • 核物理学および高エネルギー物理学

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