X射线荧光：立即发射光。这是在丝网胶片射线照相中占主导地位的机制X射线磷光：这是指发光延迟了数分钟，数小时或数天的时间，并且可以通过将特定的彩色光照射到磷光体上来加速发光。这是CR中利用的机制。它允许将X射线能量临时存储在荧光屏中，以便稍后读取。CR图像板（CR IP）该板是一层磷光体晶体（由二价euro...
海外的需求在于产品技术的迭代更新,主要看对于存量的替换。欧美发达国家和地区的卫生投入较高、医学影像设备起步早,人民健康观念较强,DR在医疗机构应用相对成熟,海外发达国家的市场需求主要体现在胶片机、CR、CCD-DR等老旧X线设备的淘汰和升级,以及存量DR设备的换修市场。 国内的需求主要来自政策驱动下的增量需求,降本...
The apparatus for obtaining an intra-oral x-ray images from a patient, the x-ray source, and is connected to the x-ray source, a radio frequency transceiver capable energized to transmit an inquiry signal, the transceiver perform four or more of the antenna and signal communication. Intraoral...
知识百科:固定和附加滤过:目前,在医用X线检查中,附加滤过板防护是放射防护的重要手段之一,也是X线防护的第一关,它置于X线球管的出线口处,通常使用铝、铜等材料,利用材料对不同能量的X线的吸收特性,过滤掉X线中能量相对较低的射线即软射线。X线管所产生的X线是一种
Cr8O–22Ti42Mo–55Cs55 W23V–27Co56Ba–72Hf55 Au28Ni–30Zn;40Zr−92U73Ta–75Re65/100 Mo31Ga–39Y76Os–92U100 Rh4Be–56Ba42Mo–92U60 In wavelength-dispersiveXRF(WDXRF),TXRFand PXRF methods, efficiencies of primary-to-detected-secondary radiation are very low. Therefore tubes for ...
Protonation of alkylidyne tungsten complexes of the types [W(CR)Cl(CO)(PMe3)(3)] or [W(CR)Cl(CO)(py)(PMe3)(2)] with HCl affords the eta(2)-alkylidene tungs... CM Bastos,MA Kjelsberg,A Mayr,... - 《Inorganica Chimica Acta》 被引量: 12发表: 1998年 Transition metal alkylidene...
Intensity and wavelength dependence of the photoconductivity in Cr-doped Sr(mathsf{_{0.61}})Ba(mathsf{_{0.39}})Nb(mathsf{_2})O(mathsf{_6}) We examine the light-induced charge transport properties of a series of chromium-doped \\(m {Sr}_{0.61}m {Ba}_{0.39}m {Nb}_2m {O}_6\\)...
electron path inside the solid target is investigated by varying the thickness of a molybdenum foil as target down to 4 µm and the laser focal spot size is varied for two fixed laser energies and one fixed laser intensity to study its impact on the x-ray source size for the best CR....
(in abundances >1ppm; Ba, Ce, Co, Cr, Cu, Ga, La, Nb, Ni, Rb, Sc, Sr, Rh, U, V, Y, Zr, and Zn) in sediment. In most cases, the sample is ground to a fine powder, mixed with a chemical flux, and melted in a furnace to create a homogenous glass (often known as a...
A. et al. Valence-to-core X-ray emission spectroscopy identification of carbide compounds in nanocrystalline Cr coatings deposited from Cr(III) electrolytes containing organic substances. J. Phys. Chem. B 110, 23192–23196 (2006). CAS PubMed Google Scholar ...