Evaluation of a novel photon-counting CT system using a 16-channel MPPC array for multicolor 3-D imaging

T. Maruhashi, H. Morita, M. Arimoto, Jun Kataoka, K. Fujieda, H. Nitta, H. Ikeda, H. Kiji

    Research output: Contribution to journalArticle

    Abstract

    X-ray computed tomography (CT) has been widely used in the diagnostic imaging of the interior of the human body. However, the radiation dose of conventional CT typically amounts to 10 mSv. Under such environments, X-ray photons are severely piled-up; therefore, conventional CT acquires energy integrated images, and artifacts are formed by beam hardening. In contrast, a photon counting CT (PC-CT) system is anticipated to construct a low-dose and multi-color CT system. Recently, we proposed a novel PC-CT system using a multipixel photon counter (MPPC) coupled with a high-speed scintillator, which is cost effective and easy to assemble compared to other methods using CdZnTe device. In this paper, we report the results using an advanced CT system consisting of a 16-channel MPPC and scintillator array coupled with a newly developed large-scale integrated circuit (LSI) having an ultrafast signal processing capability. We present the performance of the photon-counting CT capability, such as the contrast of the obtained CT images compared with that of the current-mode CT, and we found that substantial reduction in radiation dose by an order of magnitude. In addition, we report the results of three-dimensional multicolor imaging to identify phantom materials.

    Fingerprint

    Tomography
    counting
    counters
    Photons
    tomography
    Imaging techniques
    evaluation
    photons
    dosage
    Phosphors
    scintillation counters
    Dosimetry
    X rays
    human body
    radiation
    hardening
    integrated circuits
    Integrated circuits
    Hardening
    artifacts

    Keywords

    • Low-dose
    • MPPC
    • Multicolor image
    • Photon counting CT

    ASJC Scopus subject areas

    • Nuclear and High Energy Physics
    • Instrumentation

    Cite this

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    title = "Evaluation of a novel photon-counting CT system using a 16-channel MPPC array for multicolor 3-D imaging",
    abstract = "X-ray computed tomography (CT) has been widely used in the diagnostic imaging of the interior of the human body. However, the radiation dose of conventional CT typically amounts to 10 mSv. Under such environments, X-ray photons are severely piled-up; therefore, conventional CT acquires energy integrated images, and artifacts are formed by beam hardening. In contrast, a photon counting CT (PC-CT) system is anticipated to construct a low-dose and multi-color CT system. Recently, we proposed a novel PC-CT system using a multipixel photon counter (MPPC) coupled with a high-speed scintillator, which is cost effective and easy to assemble compared to other methods using CdZnTe device. In this paper, we report the results using an advanced CT system consisting of a 16-channel MPPC and scintillator array coupled with a newly developed large-scale integrated circuit (LSI) having an ultrafast signal processing capability. We present the performance of the photon-counting CT capability, such as the contrast of the obtained CT images compared with that of the current-mode CT, and we found that substantial reduction in radiation dose by an order of magnitude. In addition, we report the results of three-dimensional multicolor imaging to identify phantom materials.",
    keywords = "Low-dose, MPPC, Multicolor image, Photon counting CT",
    author = "T. Maruhashi and H. Morita and M. Arimoto and Jun Kataoka and K. Fujieda and H. Nitta and H. Ikeda and H. Kiji",
    year = "2018",
    month = "1",
    day = "1",
    doi = "10.1016/j.nima.2018.11.018",
    language = "English",
    journal = "Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment",
    issn = "0168-9002",
    publisher = "Elsevier",

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    TY - JOUR

    T1 - Evaluation of a novel photon-counting CT system using a 16-channel MPPC array for multicolor 3-D imaging

    AU - Maruhashi, T.

    AU - Morita, H.

    AU - Arimoto, M.

    AU - Kataoka, Jun

    AU - Fujieda, K.

    AU - Nitta, H.

    AU - Ikeda, H.

    AU - Kiji, H.

    PY - 2018/1/1

    Y1 - 2018/1/1

    N2 - X-ray computed tomography (CT) has been widely used in the diagnostic imaging of the interior of the human body. However, the radiation dose of conventional CT typically amounts to 10 mSv. Under such environments, X-ray photons are severely piled-up; therefore, conventional CT acquires energy integrated images, and artifacts are formed by beam hardening. In contrast, a photon counting CT (PC-CT) system is anticipated to construct a low-dose and multi-color CT system. Recently, we proposed a novel PC-CT system using a multipixel photon counter (MPPC) coupled with a high-speed scintillator, which is cost effective and easy to assemble compared to other methods using CdZnTe device. In this paper, we report the results using an advanced CT system consisting of a 16-channel MPPC and scintillator array coupled with a newly developed large-scale integrated circuit (LSI) having an ultrafast signal processing capability. We present the performance of the photon-counting CT capability, such as the contrast of the obtained CT images compared with that of the current-mode CT, and we found that substantial reduction in radiation dose by an order of magnitude. In addition, we report the results of three-dimensional multicolor imaging to identify phantom materials.

    AB - X-ray computed tomography (CT) has been widely used in the diagnostic imaging of the interior of the human body. However, the radiation dose of conventional CT typically amounts to 10 mSv. Under such environments, X-ray photons are severely piled-up; therefore, conventional CT acquires energy integrated images, and artifacts are formed by beam hardening. In contrast, a photon counting CT (PC-CT) system is anticipated to construct a low-dose and multi-color CT system. Recently, we proposed a novel PC-CT system using a multipixel photon counter (MPPC) coupled with a high-speed scintillator, which is cost effective and easy to assemble compared to other methods using CdZnTe device. In this paper, we report the results using an advanced CT system consisting of a 16-channel MPPC and scintillator array coupled with a newly developed large-scale integrated circuit (LSI) having an ultrafast signal processing capability. We present the performance of the photon-counting CT capability, such as the contrast of the obtained CT images compared with that of the current-mode CT, and we found that substantial reduction in radiation dose by an order of magnitude. In addition, we report the results of three-dimensional multicolor imaging to identify phantom materials.

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    KW - MPPC

    KW - Multicolor image

    KW - Photon counting CT

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