Photon-counting x-ray computed tomography with high spatial resolutions

Kazuki Ito; Eiichi Sato; Hodaka Moriyama; Sohei Yoshida; Kunihiro Yoshioka; Osahiko Hagiwara; Toshiyuki Enomoto; Manabu Watanabe; Hiroyuki Nitta

doi:10.1117/12.2677114

4 October 2023 Photon-counting x-ray computed tomography with high spatial resolutions

Kazuki Ito, Eiichi Sato, Hodaka Moriyama, Sohei Yoshida, Kunihiro Yoshioka, Osahiko Hagiwara, Toshiyuki Enomoto, Manabu Watanabe, Hiroyuki Nitta

Author Affiliations +

Proceedings Volume 12674, Applications of Digital Image Processing XLVI; 1267409 (2023) https://doi.org/10.1117/12.2677114
Event: SPIE Optical Engineering + Applications, 2023, San Diego, California, United States

Abstract

Photon-counting x-ray computed tomography (PCCT) is useful for selecting optimal energy photons to image various portions of the target object, and we performed fundamental experiments of PCCT to carry out gadolinium (Gd) K-edge CT using Gd-based contrast media. The scanner mainly consists of an x-ray generator with a 0.1-mm-focus tube, a turntable, a cadmium-telluride (CdTe) flat panel detector (FPD) with pixel dimensions of 100 Pm, and a personal computer. An object on the turntable is irradiated by the x-ray generator, 720 radiograms are taken using the FPD, and tomograms are reconstructed. We used 1.3-time magnification tomography, the effective pixel dimensions were approximately 80 Pm, and Gd-K-edge CT was carried out using Gd-based contrast media at a tube voltage of 100 kV, a tube current of 0.40 mA, and a threshold energy of 50 keV.

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Kazuki Ito, Eiichi Sato, Hodaka Moriyama, Sohei Yoshida, Kunihiro Yoshioka, Osahiko Hagiwara, Toshiyuki Enomoto, Manabu Watanabe, and Hiroyuki Nitta "Photon-counting x-ray computed tomography with high spatial resolutions", Proc. SPIE 12674, Applications of Digital Image Processing XLVI, 1267409 (4 October 2023); https://doi.org/10.1117/12.2677114

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KEYWORDS

X-ray computed tomography

X-rays

Gadolinium

Scanners

Computed tomography

Optical computing

Photons

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