Development of LSI for a new kind of photon-counting computed tomography using multipixel photon counters

Makoto Arimoto, Hayato Morita, Kazuya Fujieda, Takuya Maruhashi, Jun Kataoka, Hideo Nitta, Hirokazu Ikeda

    Research output: Contribution to journalArticle

    Abstract

    X-ray imaging with computed tomography (CT) is widely used for nondestructive imaging of the interior of the human body. In the next decade, photon-counting X-ray CT is expected to reduce the dose needed and enable multicolor imaging. Recently, we proposed a novel photon-counting method that uses a multipixel photon counter (MPPC), with a significantly high signal gain (~106) and fast temporal response (a few nanoseconds), combined with a high-speed scintillator. To realize photon-counting CT imaging in a wide area irradiated by an extremely high X-ray flux (106-107 Hz/mm2), a multichannel MPPC system is required. Thus, we developed a large-scale integrated circuit (LSI) with ultrafast signal-processing capability for use with a 16-channel MPPC. The developed LSI can extract a pulse current from an MPPC array with a large detector capacitance (~200 pF) by utilizing an electrical circuit with low input impedance. The LSI offers a high photon count rate above 25 MHz/pixel with noise equal to 1.7 μA for a dynamic range of ~ 1.3 mA and an energy resolution of 32 % (FWHM) at 60 keV, thereby enabling ultrafast multicolor CT imaging.

    Fingerprint

    Tomography
    integrated circuits
    Integrated circuits
    counting
    counters
    Photons
    tomography
    photons
    Imaging techniques
    X rays
    x rays
    human body
    Full width at half maximum
    Phosphors
    scintillation counters
    Dosimetry
    dynamic range
    signal processing
    Signal processing
    Capacitance

    Keywords

    • Low-dose
    • LSI
    • MPPC
    • Multicolor
    • X-ray CT

    ASJC Scopus subject areas

    • Nuclear and High Energy Physics
    • Instrumentation

    Cite this

    Development of LSI for a new kind of photon-counting computed tomography using multipixel photon counters. / Arimoto, Makoto; Morita, Hayato; Fujieda, Kazuya; Maruhashi, Takuya; Kataoka, Jun; Nitta, Hideo; Ikeda, Hirokazu.

    In: Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 01.01.2017.

    Research output: Contribution to journalArticle

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    abstract = "X-ray imaging with computed tomography (CT) is widely used for nondestructive imaging of the interior of the human body. In the next decade, photon-counting X-ray CT is expected to reduce the dose needed and enable multicolor imaging. Recently, we proposed a novel photon-counting method that uses a multipixel photon counter (MPPC), with a significantly high signal gain (~106) and fast temporal response (a few nanoseconds), combined with a high-speed scintillator. To realize photon-counting CT imaging in a wide area irradiated by an extremely high X-ray flux (106-107 Hz/mm2), a multichannel MPPC system is required. Thus, we developed a large-scale integrated circuit (LSI) with ultrafast signal-processing capability for use with a 16-channel MPPC. The developed LSI can extract a pulse current from an MPPC array with a large detector capacitance (~200 pF) by utilizing an electrical circuit with low input impedance. The LSI offers a high photon count rate above 25 MHz/pixel with noise equal to 1.7 μA for a dynamic range of ~ 1.3 mA and an energy resolution of 32 {\%} (FWHM) at 60 keV, thereby enabling ultrafast multicolor CT imaging.",
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    AU - Morita, Hayato

    AU - Fujieda, Kazuya

    AU - Maruhashi, Takuya

    AU - Kataoka, Jun

    AU - Nitta, Hideo

    AU - Ikeda, Hirokazu

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