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Proceedings Paper

Condenser-discharge stroboscopic x-ray generator for medical radiography
Author(s): Eiichi Sato; Toshio Ichimaru; Haruo Obara; Masayuki Zuguchi; Hidezo Mori; Etsuro Tanaka; Tatsumi Usuki; Koetsu Sato; Hidenori Ojima; Kazuyoshi Takayama; Kimio Sakamaki; Yoshiharu Tamakawa
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Paper Abstract

The radiogprahic characteritics of the condenser-discahrge stroboscopic x-ray genrator and its application to high-speed radiogprahy are described.This gnerator employs a coneser- discharge medical x-ray gnerator in conjunctionwith a new grid-control unit and consists of the following major componets: a high -voltage control unit, a condenser unit having a Cockcroft circuit,a grid-control unit, a high- voltage grid-control unit,a nd a rotating-anode x-ray tube unit.The main condesner of about 500 nF in the unit is charged up to 120 kV by the circuit and the electric charges inthe condene are dischargd to the triode by the grid control unit i9n conjunction with a hgih-voltage grid-control unti The highv-otalgd grid-control unit is employed inorder to insulate the negative hgih-voltage grid and acathode electrods from th ehgihs-peed grid control unit with almost the ground potnetial. Inthis gnerator, th anode and cathode lectrodes ar applied tohigh-voltages with maximumvalues of +60 kV and -60 kV, respectively. Although the tube voltrage decased during the discharging for gnerating x-rays, the maximum vlaue was equivlaent to th eitnital charging vortlag eof th emiain condenser. Th3 amsximu values of the tub ecurrent and the repetiton rat3 awer about 0.5 A and 32 kHz, respectively. The pulse widthof the x-rays ranged from 0.01 to 1.0 ms, and the maximumshot number ahd a vlaue of 32. At a constant filament (cathode) tmerpature,the x-ray intensity incrased accordign to incrases in teh charging voltage and toincrases in the duration and the maximum intensity with a duration of 1.0 ms and a charging voltage of 100 kV awas 0.66 (mu) C/kf at 1.0 m from the -ray source.The dimensiosn sof the focal spot had values of about 1 X 1 mm, and both the inner and outer triggering for produicng pulse c-rays acan be employed. The hgih-speed radiogrpahy was primari9ly performed by temultpe- shot radiogprhay using a new computed radiogprhay (CR) system in conjuctiown tiht ehcomuter-dispaly sysem with an operationsyste of Windows NT Workstation 4.0.

Paper Details

Date Published: 17 April 2001
PDF: 11 pages
Proc. SPIE 4183, 24th International Congress on High-Speed Photography and Photonics, (17 April 2001); doi: 10.1117/12.424302
Show Author Affiliations
Eiichi Sato, Iwate Medical Univ. (Japan)
Toshio Ichimaru, Hirosaki Univ. (Japan)
Haruo Obara, Tohoku Univ. (Japan)
Masayuki Zuguchi, Tohoku Univ. (Japan)
Hidezo Mori, Tokai Univ. School of Medicine (Japan)
Etsuro Tanaka, Tokai Univ. School of Medicine (Japan)
Tatsumi Usuki, Toreck Co., Ltd. (Japan)
Koetsu Sato, Toreck Co., Ltd. (Japan)
Hidenori Ojima, Tohoku Univ. (Japan)
Kazuyoshi Takayama, Tohoku Univ. (Japan)
Kimio Sakamaki, Iwate Medical Univ. (Japan)
Yoshiharu Tamakawa, Iwate Medical Univ. (Japan)


Published in SPIE Proceedings Vol. 4183:
24th International Congress on High-Speed Photography and Photonics
Kazuyoshi Takayama; Tsutomo Saito; Harald Kleine; Eugene V. Timofeev, Editor(s)

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