A Repetitional Pulsed X-Ray Generator For Biomedical Radiography

Hiroshi Isobe; Eiichi Sato; Yoshiharu Tamakawa; Toru Yanagisawa

doi:10.1117/12.969105

7 June 1989 A Repetitional Pulsed X-Ray Generator For Biomedical Radiography

Hiroshi Isobe, Eiichi Sato, Yoshiharu Tamakawa, Toru Yanagisawa

Proceedings Volume 1032, 18th Intl Congress on High Speed Photography and Photonics; (1989) https://doi.org/10.1117/12.969105
Event: 18th International Congress on High Speed Photography and Photonics, 1988, Xi'an, Shaanxi, China

Abstract

A repetitional pulsed x-ray generator in conjunction with an image intensifier system for biomedical radiography is described. This generator consisted of the following components: a high-speed power supply, various capacities of pulse condensers, a turbo molecular pump, and an oil-cooled x-ray tube. The pulse condensers were charged to the optimum voltage of less than 100kV, and the electric charges were discharged repeatedly by using the flashover mechanism. The pulse width tended to decrease when the capacity and the anode-cathode(A-C) space were reduced, and their values were less than 200ns. The current of the power supply determined the repetitional rates for the pulses, which were limited by the charging resistor, the condenser capacity, the charging voltage, and the electric power of the power supply. The maximum value was less than 20Hz due to the ripples of the charging current of 50Hz. The x-ray quality primarily became hard by increasing the charging voltage, and inserting metal filters. The effective focal spot size primarily varied according to the diameter of anode tip, and its size was less than 3.0mm in diameter. Pulsed x-ray fluoro-scopy was performed by using an image intensifier system utilizing a CRT for medical use.

Citation Download Citation

Hiroshi Isobe, Eiichi Sato, Yoshiharu Tamakawa, and Toru Yanagisawa "A Repetitional Pulsed X-Ray Generator For Biomedical Radiography", Proc. SPIE 1032, 18th Intl Congress on High Speed Photography and Photonics, (7 June 1989); https://doi.org/10.1117/12.969105

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KEYWORDS

X-rays

CRTs

Power supplies

Radiography

Televisions

Biomedical optics

Image resolution

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