850-nm-peak high-sensitivity near-infrared-ray computed tomography scanner in the living-body window

Sato, Yuichi; Takaoka, Akio; Sato, Tsukuru; Satô, Eiichi; Oda, Y.; Yoshida, Sohei; Moriyama, Hodaka; Hagiwara, Osahiko; Miyata, Hiroshi; Enomoto, Toshiyuki; Watanabe, Manabu; Kusachi, Shozo

doi:10.1007/s12553-018-0237-3

Cited by 7 publications

(1 citation statement)

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“…[1][2][3][4] Using the PCCT scanners, we performed K-edge CT using iodine (I) and gadolinium (Gd) contrast media, since photons with energies just beyond the K-edge energy are absorbed effectively by the contrast media. Recently, we developed a near-infrared-ray computed tomography (NIRCT) scanners [5][6][7] in the living-body range of 700-900 nm to observe thick blood vessels. However, the NIR photons did not easily penetrate muscles, and it was not easy to image blood vessels.…”

Section: Introductionmentioning

confidence: 99%

Red-ray computed tomography with high spatial resolutions

Hagiwara,

Sato,

Ito

et al. 2023

Applications of Digital Image Processing XLVI

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To image blood vessels, we performed fundamental experiments of a red-ray computed tomography (RRCT) scanner using 650-nm-laser and high-sensitivity-photodiode (PD) modules. The line laser beam is irradiated to an object, and the photons penetrating through the object are detected using the PD module through a 1.0-mm-diameter graphite pinhole and a 0.7-mm-diameter 5-mm-length graphite collimator for the PD. The spatial resolutions were primarily determined by the collimator diameter for the PD and were approximately 0.7×0.7 mm2. RRCT was performed by repeating the reciprocating translations and rotations of the object, and the ray-sampling-translation and rotation steps were 0.1 mm and 0.5°, respectively. The image contrast was regulated using the digital amplifier, and the visible diameter of object was 0.5mm.

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