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Proceedings Paper

Weakly ionized cerium plasma radiography
Author(s): Eiichi Sato; Yasuomi Hayasi; Rudolf Germer; Yoshitake Koorikawa; Kazunori Murakami; Etsuro Tanaka; Hidezo Mori; Toshiaki Kawai; Toshio Ichimaru; Fumiko Obata; Kiyomi Takahashi; Sigehiro Sato; Kazuyoshi Takayama; Hideaki Ido
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Paper Abstract

In the plasma flash x-ray generator, high-voltage main condenser of about 200 nF is charged up to 55 kV by a power supply, and electric charges in the condenser are discharged to an x-ray tube after triggering the cathode electrode. The flash x-rays are then produced. The x-ray tube is of a demountable triode that is connected to a turbo molecular pump with a pressure of approximately 1 mPa. As electron flows from the cathode electrode are roughly converged to a rod cerium target of 3.0 mm in diameter by electric field in the x-ray tube, the weakly ionized linear plasma, which consists of cerium ions and electrons, forms by target evaporating. At a charging voltage of 55 kV, the maximum tube voltage was almost equal to the charging voltage of the main condenser, and the peak current was about 20 kA. When the charging voltage was increased, weakly ionized cerium plasma formed, and the K-series characteristic x-ray intensities increased. The x-ray pulse widths were about 500 ns, and the time-integrated x-ray intensity had a value of about 40 μC/kg at 1.0 m from x-ray source with a charging voltage of 55 kV. In the angiography, we employed a film-less computed radiography (CR) system and iodine-based microspheres. Because K-series characteristic x-rays are absorbed easily by the microspheres, high-contrast angiography has been performed.

Paper Details

Date Published: 6 February 2004
PDF: 10 pages
Proc. SPIE 5210, Ultrahigh- and High-Speed Photography, Photonics, and Videography, (6 February 2004); doi: 10.1117/12.506563
Show Author Affiliations
Eiichi Sato, Iwate Medical Univ. (Japan)
Yasuomi Hayasi, Iwate Medical Univ. (Japan)
Rudolf Germer, Fachhochschule fuer Technik und Wirtschaft Berlin (Germany)
Technische Univ. Berlin (Germany)
Yoshitake Koorikawa, Iwate Medical Univ. (Japan)
Kazunori Murakami, Iwate Medical Univ. (Japan)
Etsuro Tanaka, Tokyo Univ. of Agriculture and Technology (Japan)
Hidezo Mori, National Cardiovascular Ctr. Research Institute (Japan)
Toshiaki Kawai, Hamamatsu Photonics KK (Japan)
Toshio Ichimaru, Hirosaki Univ. (Japan)
Fumiko Obata, Iwate Medical Univ. (Japan)
Kiyomi Takahashi, Iwate Medical Univ. (Japan)
Sigehiro Sato, Iwate Medical Univ. (Japan)
Kazuyoshi Takayama, Tohoku Univ. (Japan)
Hideaki Ido, Tohoku Gakuin Univ. (Japan)

Published in SPIE Proceedings Vol. 5210:
Ultrahigh- and High-Speed Photography, Photonics, and Videography
Donald R. Snyder, Editor(s)

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