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, J.
AU - Fujieda, K.
AU - Nitta, H.
AU - Ikeda, H.
AU - Kiji, H.
N1 - Funding Information:
This work was supported by JSPS KAKENHI Grant Number JP15H05720 , JP16H07266 and the Key Researchers Development Program at Waseda University . M.A. acknowledges the support from the JSPS Leading Initiative for Excellent Young Researchers program and the Naito foundation .
Publisher Copyright:
© 2018 Elsevier B.V.
PY - 2019/8/21
Y1 - 2019/8/21
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.
KW - Low-dose
KW - MPPC
KW - Multicolor image
KW - Photon counting CT
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U2 - 10.1016/j.nima.2018.11.018
DO - 10.1016/j.nima.2018.11.018
M3 - Review article
AN - SCOPUS:85057785613
VL - 936
SP - 5
EP - 9
JO - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
JF - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
SN - 0168-9002
ER -