Electric light bulbs and X-ray tubes are made with a vacuum which makes them more efficient. 电灯泡和x-光管是利用真空原理制造出的,而且真空使其效率提高。
The fourth-generation ultra-sophisticated, ultra-thin window of X-ray tubes, improved analytical sensitivity; 第四代超尖端、超薄窗X射线管,提高分析灵敏度;
Protective casing, for X-ray tubes 白炽定心装置,X射线设备用
Radiation from X-ray tubes with a source size of the order of micrometer is also applicable for X-ray phase-contrast imaging ( XPCI), because of its fairly good spatial coherence. 光源点尺寸达微米量级的X射线管辐射具有较好的空间相干性,也可用于相衬成像研究。
Dual energy output by two x-ray tubes improves the differentiation of body tissues, clinical application and lesion diagnostic accuracy of CT. Explore the new way of developing the ability of project management 同时,双球管可同时输出不同能量的X线,提高了CT对不同组织的鉴别能力,拓展了CT的应用范围,提高了对病变诊断的正确性。项目管理能力拓展新思维探索
Using this method, the spectral purity of a number of X-ray tubes was determined. 用这一方法,对许多X射线管进行了测定。
Energy-dispersive X-ray spectroscopy ( EDX) and selected-area electron diffraction ( SAED) analyses pro-vide definite evidences for asbestos fibres encapsulated by carbon tubes. 内部的石棉纤维及其外部的碳管均经过X射线能量损失谱(EDX)的成份分析及选区电子衍射(SAED)的结构分析加以证实。
The demands of rotating anode X-ray tubes used for CT on Chinese market are introduced and a proposal how to join in this field is presented. 阐明了我国CT机对旋转阳极X射线管市场的需求,并提出了切入此领域的建议。
In this paper, a method for quantitative determination of spectral distributions of primary radiation from X-ray tubes for diffraction and X-ray fluorescent spectral analysis is presented. 本文提出了衍射或荧光分析用的X射线管原级X射线谱强度分布的定量测定方法。
In this paper, a method for quantitative determination of spectral purity of X-ray tubes for diffraction analysis is presented. 本文提出了衍射分析用的X射线管谱线纯度的定量测定方法。
Besides, the high voltage technique is instrumental in lengthening the service life of X-ray tubes. 此外,使用高电压技术还有利于延长X射线管的使用寿命。
The resolution limit and the equivalent focal size of X-ray tubes are two important parameters that evaluate the imaging performance of the focal spot. X线管焦点的极限分辨率(L.p/mm)和等效尺寸是评价X线管焦点成象特性的两个重要的参量。
The determination of the resolution limit and the equivalent focal spot size of X-ray tubes by the 2 ° star test pattern 应用2°星模测试卡对X线管焦点的极限分辨率和等效尺寸的测试
Exploration and Practice in the Development of X-Ray Tubes with Small Focuses 小焦点X射线管研制开发中的探索与实践
Method: Apply the X-ray intervention, SSG and FTR, to 209 tubes of 108 patients. 方法应用放射介入技术,对输卵管性不孕患者108例的209条输卵管进行SSG和FTR。
According to the measurement of 10 x-ray tubes, the difference of the x-ray intensity between the cathode and anode end of x-ray tube is 20-70%. 10台X线机测定结果示X线管阴阳极两端X线强度分布差异为20~70%。
The dual source computed tomography is equipped with two X-ray tubes and two corresponding detectors. With its 83 ms-temporal resolution of single segment reconstruction, high quality coronary artery CT angiography can be acquired without heart rate control. 双源CT具有双球管和双组探测器,其单扇区重建时间分辨率可达83ms,可在不控制心率的情况下获得高质量的冠状动脉血管图像。
For the fluorescent X-ray tubes, several spectral distributions of different directions of primary X-ray beam must be determined and then the mean values of these data are calculated in order to obtain the effective spectral distributions. 对荧光X射线管还应测定几个射线束方向的原级谱加以平均求得有效原级谱。
The X-ray tubes adopted in pseudo dual-energy systems produce X-ray photons with continuous energy spectra, which results in the decrement of the correctness of object classification based on traditional dual-energy transmission models because of the thickness effect. 伪双能系统的射线源产生的是连续能谱的X射线,因此基于传统双能透射模型的物质鉴别方法由于受到物体的厚度影响而导致准确性的降低。