Journal ArticleDOI
Sub-kilohertz flash X-ray generator utilising a glass-enclosed cold-cathode triode.
Eiichi Sato,Kei Takahashi,Michiaki Sagae,Shingo Kimura,Teiji Oizumi,Y. Hayasi,Yoshiharu Tamakawa,Toru Yanagisawa +7 more
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TLDR
The construction and fundamental studies are described for a subkilohertz X-ray generator for producing low-dose rate flash X-rays and high-speed radiography was performed.Abstract:
The construction and fundamental studies are described for a sub-kilohertz X-ray generator for producing low-dose rate flash X-rays. The X-ray tube was a glass-enclosed cold-cathode triode, composed of a tungsten plate target, a rod-shaped graphite cathode, a mesh-type trigger electrode made of tungsten wires, and a glass tube body. The coaxial condenser was charged up to 60 kV by a power supply, and the electric charges in the condenser were discharged to the X-ray tube repetitively when a negative high-voltage pulse was applied to the trigger electrode. The maximum tube voltage before the discharging was equivalent to the initial charged voltage of the condenser, and the maximum tube current was about 0.3 kA with a charged voltage of 60 kV. The X-ray durations were about 1 microsecond, and the X-ray intensity was about 0.47 microC kg-1 at 0.5 m per pulse with a charged voltage of 60 kV. The maximum repetition rate of the X-rays was about 0.4 kHz, and high-speed radiography was performed.read more
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Journal ArticleDOI
Demonstration of enhanced K-edge angiography using a cerium target x-ray generator.
Eiichi Sato,Etsuro Tanaka,Hidezo Mori,Toshiaki Kawai,Toshio Ichimaru,Shigehiro Sato,Kazuyoshi Takayama,Hideaki Ido +7 more
TL;DR: The cerium target x-ray generator is useful in order to perform enhanced K-edge angiography using a cone beam because K-series characteristic x rays from the Cerium target are absorbed effectively by iodine-based contrast mediums.
Journal ArticleDOI
Quasi-monochromatic flash x-ray generator utilizing weakly ionized linear copper plasma
Eiichi Sato,Yasuomi Hayasi,Rudolf Germer,Etsuro Tanaka,Hidezo Mori,Toshiaki Kawai,Toshio Ichimaru,Kazuyoshi Takayama,Hideaki Ido +8 more
TL;DR: In this paper, a plasma flash x-ray generator with a 200 nF condenser is charged up to 50 kV by a power supply, and flash x rays are produced by the discharging.
Journal ArticleDOI
Sharp characteristic X-ray irradiation from weakly ionized linear plasma
Eiichi Sato,Yasuomi Hayasi,Rudolf Germer,Etsuro Tanaka,Hidezo Mori,Toshiaki Kawai,Toshio Ichimaru,Sigehiro Sato,Kazuyoshi Takayama,Hideaki Ido +9 more
TL;DR: In this paper, a plasma flash X-ray generator with a high-voltage main condenser of approximately 200 nF is charged up to 50kV by a power supply, and electric charges in the condenser are discharged to an Xray tube after triggering the cathode electrode.
Journal ArticleDOI
K-edge angiography utilizing a tungsten plasma X-ray generator in conjunction with gadolinium-based contrast media
Eiichi Sato,Yasuomi Hayasi,Etsuro Tanaka,Hidezo Mori,Toshiaki Kawai,Takashi Inoue,Akira Ogawa,Shigehiro Sato,Kazuyoshi Takayama,Jun Onagawa,Hideaki Ido +10 more
TL;DR: In this paper, a tungsten plasma flash X-ray generator is used to perform high-speed enhanced K-edge angiography using cone beams because K-series characteristic X-rays from the target are absorbed effectively by gadolinium-based contrast media.
Journal ArticleDOI
Compact monochromatic flash x-ray generator utilizing a disk-cathode molybdenum tube
Eiichi Sato,Etsuro Tanaka,Hidezo Mori,Toshiaki Kawai,Toshio Ichimaru,Shigehiro Sato,Kazuyoshi Takayama,Hideaki Ido +7 more
TL;DR: The high-voltage condensers in a polarity-inversion two-stage Marx surge generator are charged from -50 to -70 kV by a power supply, and the electric charges in the condenser are discharged to an x-ray tube after closing gap switches in the surge generator with a trigger device.
References
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Journal ArticleDOI
Photon mass attenuation and energy-absorption coefficients
TL;DR: In this paper, mass attenuation coefficients μ/ϱ and mass energy-absorption coefficients μ cn/ϑ are tabulated in units of m 2 kg −1 for photon energies 1 keV to 20 MeV for 40 elements ranging from hydrogen (Z = 1) to uranium (Z= 92).
Journal ArticleDOI
Computed radiography utilizing scanning laser stimulated luminescence
TL;DR: A new system of computed radiography that is based on new concepts and the latest computer technologies has been developed and eliminates the drawbacks of conventional screen-film radiography.
Journal ArticleDOI
X-ray flash techniques
TL;DR: In this paper, the authors examined the problems of X-ray flash production and its applications, similar to those of continuous X-radiation, and showed that the flash time is mostly between 10 ns and 1 mu s.
Journal ArticleDOI
Three-dimensional readout of flash x-ray images of living sperm in water by atomic-force microscopy
TL;DR: A subnanosecond x-ray pulse from a laser-produced plasma was used to record the x-rays of living sea urchin sperm in an x-Ray resist, and the resist relief was visualized at high resolution by atomic-force microscopy.
Journal ArticleDOI
Repetitive flash x‐ray generator utilizing a simple diode with a new type of energy‐selective function
TL;DR: In this article, the authors described the construction and fundamental studies of a repetitive flash x-ray generator having a simple diode with an energy-selective function. But the generator was not designed for high-energy impulse switching.