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, J. Kataoka, K. Fujieda, H. Nitta, H. Ikeda, H. Kiji

*この研究の対応する著者

研究成果: Review article査読

6 被引用数 (Scopus)

抄録

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.

本文言語English
ページ(範囲)5-9
ページ数5
ジャーナルNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
936
DOI
出版ステータスPublished - 2019 8 21

ASJC Scopus subject areas

  • 核物理学および高エネルギー物理学
  • 器械工学

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