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Proceedings Paper

Fundamental study on parallel-beam radiography using a polycapillary plate
Author(s): Eiichi Sato; Hiroyuki Toriyabe; Yasuomi Hayasi; Etsuro Tanaka; Hidezo Mori; Toshiaki Kawai; Tatsumi Usuki; Koetsu Sato; Haruo Obara; Toshio Ichimaru; Kazuyoshi Takayama; Hideaki Ido; Yoshiharu Tamakawa
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Paper Abstract

Fundamental study on parallel beam radiography using a polycapillary plate is described. The x-ray generator used in this experiment is NST-1005 made by Sofron Inc. with maximum tube voltage and current of 100kV and 5.0 mA, respectively. In this experiment, the tube voltage was regulated from 20 to 30 kV, and the tube current had a constant value of 4.0 mA. The exposure time is regulated in order to control optimum film density. The polycapillary plate is J5022-21 made by Hamamatsu Photonics, and the outside and effective diameters are 87 and 77 mm, respectively. The thickness and the whole diameter of the polycapillary are 1.0 mm and 25 micrometers , respectively. The x- rays from the tube are formed to parallel beam by the polycapillary, and the radiogram is taken using an industrial x-ray film of Fuji IX 100 without using a screen. In the measurement of image resolution, we employed three brass spacers of 2, 30, and 60 mm in height. By the test chart, the resolution decreased according to increases in the spacer height without using the polycapillary. In contrast, the resolution seldom varied when the polycapillary was employed. In the polycapillary radiography of four tungsten wires, higher-contrast images of 50 micrometers wire were observed, and the line width seldom varied according to increases in the spacer height.

Paper Details

Date Published: 3 May 2002
PDF: 13 pages
Proc. SPIE 4682, Medical Imaging 2002: Physics of Medical Imaging, (3 May 2002); doi: 10.1117/12.465571
Show Author Affiliations
Eiichi Sato, Iwate Medical Univ. (Japan)
Hiroyuki Toriyabe, Iwate Medical Univ. (Japan)
Yasuomi Hayasi, Hachinohe National College of Technology (Japan)
Etsuro Tanaka, Tokai Univ. School of Medicine (Japan)
Hidezo Mori, National Cardiovascular Ctr. Research Institute (Japan)
Toshiaki Kawai, Hamamatsu Photonics KK (Japan)
Tatsumi Usuki, Toreck Co., Ltd. (Japan)
Koetsu Sato, Toreck Co., Ltd. (Japan)
Haruo Obara, Tohoku Univ. (Japan)
Toshio Ichimaru, Hirosaki Univ. (Japan)
Kazuyoshi Takayama, Tohoku Univ. (Japan)
Hideaki Ido, Tohoku Gakuin Univ. (Japan)
Yoshiharu Tamakawa, Iwate Medical Univ. (Japan)


Published in SPIE Proceedings Vol. 4682:
Medical Imaging 2002: Physics of Medical Imaging
Larry E. Antonuk; Martin Joel Yaffe, Editor(s)

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