21 September 2005 Energy-selective gadolinium angiography utilizing a stroboscopic x-ray generator
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Abstract
Energy-selective high-speed radiography utilizing a kilohertz-range stroboscopic x-ray generator and its application to high-speed angiography are described. This generator consists of the following major components: a main controller, a condenser unit with a Cockcroft-Walton circuit, and an x-ray tube unit in conjunction with a grid controller. The main condenser of about 500 nF in the unit is charged up to 120 kV by the circuit, and the electric charges in the condenser are discharged to the triode by the grid control circuit. Although the tube voltage decreased during the discharging for generating x-rays, the maximum value was equal to the initial charging voltage of the main condenser. The maximum tube current and the repetition rate were approximately 0.5 A and 50 kHz, respectively. The x-ray pulse width ranged from 0.01 to 1.0 ms, and the maximum shot number had a value of 32. At a charging voltage of 100 kV and a width of 1.0 ms, the x-ray intensity obtained using a 50-μm-thick tungsten filter was 9.88 μGy at 1.0 m, and the dimensions of the focal spot had values of approximately 1×1 mm. Angiography was performed using the filter at a charging voltage of 100 kV.
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Eiichi Sato, Yasuomi Hayasi, Rudolf Germer, Koji Kimura, Etsuro Tanaka, Hidezo Mori, Toshiaki Kawai, Takashi Inoue, Akira Ogawa, Shigehiro Sato, Kazuyoshi Takayama, Hideaki Ido, "Energy-selective gadolinium angiography utilizing a stroboscopic x-ray generator", Proc. SPIE 5920, Ultrafast X-Ray Detectors, High-Speed Imaging, and Applications, 59200V (21 September 2005); doi: 10.1117/12.621056; https://doi.org/10.1117/12.621056
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