High-speed K-edge angiography achieved with tantalum K-series characteristic x rays

Eiichi Sato; Etsuro Tanaka; Hidezo Mori; Toshiaki Kawai; Takashi Inoue; Akira Ogawa; Shigehiro Sato; Kazuyoshi Takayama; Hideaki Ido

doi:10.1117/12.601547

20 April 2005 High-speed K-edge angiography achieved with tantalum K-series characteristic x rays (Honorable Mention Poster Award)

Eiichi Sato, Etsuro Tanaka, Hidezo Mori, Toshiaki Kawai, Takashi Inoue, Akira Ogawa, Shigehiro Sato, Kazuyoshi Takayama, Hideaki Ido

Author Affiliations +

Proceedings Volume 5745, Medical Imaging 2005: Physics of Medical Imaging; (2005) https://doi.org/10.1117/12.601547
Event: Medical Imaging, 2005, San Diego, California, United States

Abstract

The tantalum plasma flash x-ray generator is useful in order to perform high-speed K-edge angiography using cone beams because Kα rays from the tantalum target are absorbed effectively by gadolinium-based contrast media. In the flash x-ray generator, a 150 nF condenser is charged up to 80 kV by a power supply, and flash x rays are produced by the discharging. The x-ray tube is a demountable diode, and the turbomolecular pump evacuates air from the tube with a pressure of approximately 1 mPa. Since the electric circuit of the high-voltage pulse generator employs a cable transmission line, the high-voltage pulse generator produces twice the potential of the condenser charging voltage. When the charging voltage was increased, the K-series characteristic x-ray intensities of tantalum increased. The K lines were clean and intense, and hardly any bremsstrahlung rays were detected. The x-ray pulse widths were approximately 100 ns, and the time-integrated x-ray intensity had a value of approximately 300 μGy at 1.0 m from the x-ray source with a charging voltage of 80 kV. Angiography was performed using a film-less computed radiography (CR) system and gadolinium-based contrast media. In angiography of non-living animals, we observed fine blood vessels of approximately 100 μm with high contrasts.

Citation Download Citation

Eiichi Sato, Etsuro Tanaka, Hidezo Mori, Toshiaki Kawai, Takashi Inoue, Akira Ogawa, Shigehiro Sato, Kazuyoshi Takayama, and Hideaki Ido "High-speed K-edge angiography achieved with tantalum K-series characteristic x rays (Honorable Mention Poster Award)", Proc. SPIE 5745, Medical Imaging 2005: Physics of Medical Imaging, (20 April 2005); https://doi.org/10.1117/12.601547

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