High-speed soft x-ray generators in biomedicine
High-speed soft x-ray generators in biomedicine
复制标题
生物医学中的高速软 X 射线发生器
DOI：
10.1117/12.209662
复制
发表时间：
1995
期刊：
影响因子：
--
通讯作者：
Kanji Mitoya
中科院分区：
文献类型：
--
作者：
E. Sato;M. Sagae;Kei Takahashi;T. Oizumi;H. Ojima;K. Takayama;Yoshiharu Takayama;T. Yanagisawa;A. Fujiwara;Kanji Mitoya
本文介绍了可用于生物医学X射线照相的最大光子能量小于150 keV的高速软X射线发生器的结构和基本研究。具有冷阴极辐射管的闪光X射线发生器分为四种类型：（1）高强度单闪光X射线发生器，（2）双能量闪光X射线发生器，（3）单等离子体闪光X射线发生器，以及（4）重复紧凑闪光X射线发生器。一般来说，当我们采用带二极管的闪光X射线发生器时，脉冲宽度的值小于200 ns。在我们采用具有闪烁器的长持续时间闪光X射线发生器的情况下，宽度可以增加到大约40微秒。用高强度发生器实现的最大管电流超过10 kA，并且紧凑型发生器的最大重复频率具有约0.4 kHz的值。为了获得大于1 kHz的更高重复率，我们开发了三种类型的具有热阴极管的脉冲X射线发生器：（5）30 kHz高剂量率发生器，（6）30 kHz可变持续时间微秒发生器，和（7）两个10 kHz高光子能量发生器。当采用高剂量率发生器时，通过施加正栅极电压，最大管电流可以增加到约2A。相反，由于持续时间通过使用微秒发生器控制在微秒范围内，因此获得了用于正常射线照相术的足够的X射线强度。使用高压Transformer和二极管，最大光子能量可以增加超过100 keV。使用这些发生器，我们进行了各种高速软X射线摄影。
The constructions and the fundamental studies of high-speed soft x-ray generators which can be used for performing biomedical radiography with maximum photon energies of less than 150 keV are described. The flash x- ray generators having cold-cathode radiation tubes are classified to four types: (1) high-intensity single flash x-ray generators, (2) dual- energy flash x-ray generators, (3) single plasma flash x-ray generators, and (4) repetitive compact flash x-ray generators. In general, when we employed flash x-ray generators with diodes, the pulse widths had values of less than 200 ns. In the case where we employed a long-duration flash x-ray generator having a triode, the width could be increased up to about 40 microsecond(s) . The maximum tube currents achieved with high-intensity generators were more than 10 kA, and the maximum repetition rate of a compact generator has a value of about 0.4 kHz. In order to obtain higher repetition rates of more than 1 kHz, we developed three types of pulsed x-ray generators having hot-cathode tubes as follows: (5) a 30 kHz high-dose-rate generator, (6) a 30 kHz variable-duration microsecond generator, and (7) two 10 kHz high-photon-energy generators. When a high-dose-rate generator was employed, the maximum tube current can be increased up to about 2 A by applying the positive grid voltage. In contrast, as the duration was controlled in a microsecond range by using a microsecond generator, the sufficient x-ray intensities for the normal radiography were obtained. The maximum photon energy could be increased more than 100 keV using a high-voltage transformer in conjunction with a diode. Using these generators, we performed various kinds of high- speed soft radiographies.
采用铜靶二极管的单色闪光 X 射线发生器
DOI：
--
发表时间：
2005
期刊：
SPIE 5580
影响因子：
--
作者：
E.Sato;M.Sagae;M.Komatsu;R.Germer;E.Tanaka;H.Mori;T.Kawai;T.Ichimaru;S.Sato;H.Ojima;K.Takayama;H.Ido
通讯作者：
H.Ido