Development of novel x-ray generators and their applications to monochromatic radiography systems instead of synchrotrons

新型 X 射线发生器的开发及其在单色射线照相系统中替代同步加速器的应用

• 批准号: 16591222
• 负责人: SATO Eiichi
• 金额: $ 2.24万
• 依托单位: Iwate Medical University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2004
• 资助国家: 日本
• 起止时间: 2004 至 2006
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-16591222/
• 关键词: monochromatic x-rays; K-series characteristic x-rays; plasma x-ray generator; monochromatic steady state x-rays; cerium x-ray generator; enhanced K-edge angiography; magnification radiography; phase contrast; サマリウムK系列特性X線; ガドリウムK系列特性X線; ヨウ素Kエッジ造

1. We developed a weakly ionized linear plasma flash x-ray generator and succeeded in generating clean K-series characteristic x-rays of ferrum, nickel, and copper.2. We developed a high-photon-energy plasma flash x-ray generator and succeeded in producing comparatively clean K-series characteristic x-rays of cerium, gadolinium, tantalum, and tungsten.3. Narrow-photon-energy steady-state x-ray generator was developed using a 100-μm-focus x-ray generator and a silicon crystal, and quasi-monochromatic cone-beam radiography was performed by magnification imaging.4. Cerium, samarium, and gadolinium x-ray generators were developed to perform iodine-K-edge angiography because Kα rays of these elements are absorbed effectively by iodine-based contrast media. In enhanced angiography, fine blood vessels of approximately 100 μm in diameter were observed with high contrasts.5. Microfocus x-ray generators are useful to perform K-edge magnification angiography by controlling the x-ray spectra using a 3.0-mm-thick aluminum filter. In magnification digital radiography, the spatial resolution is improved, and the scattering x-ray intensity in a radiogram from an object decreases. In addition, phase-contrast effects are added. Therefore, the resolution was improved to approximately 50 μm using a 20-μm-focus x-ray tube in conjunction with a computed radiography system with a sampling pitch of 87.5 μm. Subsequently, we succeeded in performing real-time magnification angiography using an image-intensifier camera and a flat panel detector.6. We succeeded in performing gadolinium K-edge angiography utilizing tungsten Kα rays and gadolinium-based contrast media because the Kα rays were absorbed effectively by the gadolinium media. Using this angiography, blood vessels of approximately 100 μm in diameter were visible.

1.我们研制了一台弱电离线性等离子体闪光X射线发生器，并成功地产生了铁、镍、铜等元素的清洁K系列特征X射线.我们研制了高光子能等离子体闪光X射线发生器，成功地产生了相对洁净的铈、钆、钽、钨K系列特征X射线.利用100 μ m焦点X射线发生器和硅晶体研制了窄光子能量稳态X射线发生器，并通过放大成像进行了准单色锥束摄影.铈、钐和钆X射线发生器被开发用于进行碘-K边缘血管造影，因为这些元素的Kα射线可被碘基造影剂有效吸收。增强造影可见直径约100 μm的细小血管，对比度高.微焦点X射线发生器可用于通过使用3.0 mm厚的铝过滤器控制X射线光谱来执行K边缘放大血管造影术。在放大数字射线照相中，空间分辨率提高，并且来自对象的射线照片中的散射X射线强度降低。此外，还增加了相位对比效果。因此，使用20 μ m焦点X射线管结合采样间距为87.5 μm的计算机X射线摄影系统，分辨率提高到约50 μm。随后，我们成功地使用图像增强器相机和平板探测器进行实时放大血管造影。我们成功地使用钨Kα射线和钆基造影剂进行了钆K边缘血管造影术，因为Kα射线被钆介质有效吸收。使用该血管造影术，可以看到直径约100 μm的血管。

项目成果

Superposition of x-ray spectra using double-target plasma triode

使用双靶等离子体三极管叠加 X 射线光谱

• 发表时间: 2004
• 期刊: Proc. of SPIE 5580
• 作者: Haruo Obara;Eiichi Sato;Etsuro Tanaka et al.
• 通讯作者: Etsuro Tanaka et al.

Preliminary experiment for producing higher harmonic x rays utilizing copper plasma triode

利用铜等离子体三极管产生高次谐波X射线的初步实验

• 发表时间: 2005
• 期刊: Gensikakukenkyu 49(5)
• 作者: E.Sato;E.Tanaka;H.Mori;T.Kawai;T.Inoue;A.Ogawa;S.Sat;K.Takayama;H.Ido
• 通讯作者: H.Ido

Enhanced real-time magnification angiography utilizing a 100-μm-focus x-ray generator in conjunction with an image intensifier

利用 100 μm 焦点 X 射线发生器与图像增强器结合进行增强型实时放大血管造影

• 发表时间: 2006
• 期刊: SPIE 6319
• 作者: E.Sato;E.Tanaka;H.Mori;T.Kawai;T.Inoue;A.Ogawa;M.Izumisawa;K.Takahashi;S.Sato;T.Ichimaru;K.Takayama
• 通讯作者: K.Takayama

Super-characteristic x-ray generator utilizing a pipe and rod target

利用管棒靶的超特性 X 射线发生器

• 发表时间: 2006
• 期刊: SPIE 6319
• 作者: E.Sato;E.Tanaka;H.Mori;T.Kawai;T.Inoue;A.Ogawa;M.Izumisawa;K.Takahashi;S.Sato;T.Ichimaru;K.Takayama
• 通讯作者: K.Takayama

Quasi-monochromatic parallel radiography utikizing a computed radiography system

利用计算机射线照相系统的准单色并行射线照相

• 发表时间: 2004
• 期刊: J. Electr. Spectrosc. Relat. Phenom. 137-140
• 作者: E.Sato;Y.Hayasi;R.Germer;E.Tanaka;H.Mori;T.Kawai;T.Ichimaru;S.Sato;K.Takayama;H.Ido
• 通讯作者: H.Ido