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- High Energy X Ray Imaging Device 高能x射线成像装置
- High energy X ray 高能X射线
- X ray is always transformed to visible light for detection by scintillator in high energy radiography systems. 在高能闪光照相中,转换屏起着将高能X光转变成可见光的作用,它对系统的空间分辨率有重要影响。
- Recently there has been considerable interested in the Thomson scattering between high energy laser and relativistic electron beam, and a new kind of X ray source named laser synchrotron source(LSS) has been discussed based on this principle. 利用强激光和相对论性电子束在任意相互作用方向发生的非线性Thomson散射理论,计算了平面偏振激光在相互作用角为180°、178.;5°和90°三种条件下发生Thomson散射所产生的X射线波长、相互作用时间等结果,并作出了178
- The structures and compositions of pyrite surface before and after high energy electron beam irradiation were investigated by applying X ray photoelectron spectroscope(XPS)and X ray diffraction(XRD). 利用X射线光电子能谱(XPS)和X射线衍射(XRD)对高能电子束辐照前后晶体黄铁矿的表面结构进行了分析。
- Methods: Body composition was measured with dual energy X ray absorptiometry(DXA). 方法 : 采用双能 X线吸收测量法 ( dual- energy X- ray absorptionmetry,DXA)测量全身及各部位的体成分。
- METHODS Fifty five tumor cases were confirmed on HPO with 99 Tc m MDP the whole body bone scintigraphy combined X ray imaging and clinical manifestation. 方法 放射性核素 99Tcm- MDP全身骨显像结合临床表现 ;对继发性 HOA的肿瘤患者 5 5例进行了核素闪烁显像分析 .
- Objective:To find the clinical significance and value by using Dual Energy X ray Absorptionmetry (DEXA)as a quantitative measure of callus. 目的:应用双能X线骨密度测定仪(DEXA)观察骨折愈合过程中骨痂的骨密度变化,说明临床测定骨折愈合程度的方法。
- Objective To measure the periprosthetic bone mineral density (BMD) after uncemented hip arthroplasty by applying the upgraded Dual energy X ray absorptiometry (DEXA) method. 目的 改良双能X线吸收法 (dual-energyX -rayabsorptiometry ,DEXA)并应用于临床研究。
- Objective:To measure directly the distribution of body composition and assess the correlation between body fat distribution and age,sex by dual energy X ray absorptiometry(DXA). 目的:应用双能X射线吸收法(DXA)直接测量评定体成分的分布及其与年龄、性别的关系。
- The BMD of mandibular angle and coxofemoral region (femoral neck, trochanter, and wards triangle) of all subjects were measured by dual energy X ray absorptiometry(DXA). 采用双能X线吸收法,测量全部研究对象右侧髋部与左侧下颌角的骨密度;
- A free-air chamber for measuring exposur e of low energy X ray was developed, and the computer system for measuring monoc hromatic synchrotron X ray was studied. 为同步辐射单色X光照射量测量研制出自由空气电离室。设计了现场照射量测量的计算机系统。
- Methods\ Persons were measured both hip and lumber vertebra sites by dual energy X ray absorptiometry and comparing sensitivity analysis of hip and lumber vertebra bone density. 方法采用双能X线骨密度测量仪对同一患者进行髋部及腰部骨密度测量,分析比较不同部位测量数据对骨质疏松症诊断的敏感性。
- High Energy X - Ray Instrumentation System for Aeroengine Test 航空发动机高能X射线测试系统
- A vacuum tube containing a metal target onto which a beam of electrons is directed at high energy for the generation of X rays. 一束电子被高能量定向以产生x光的包含有金属对象的真空管。
- Objective To establish femoral shaft datum line based on frontal and lateral X ray images. 目的根据正位和侧位的X线图像建立股骨骨干的三维基准线。
- METHODS By XR 36 dual energy X ray absorptiometry (DEXA) and other methods, the length,diameter, surface area, weight, bone mineral density and mineral content of femur and tibia were measured. 方法 采用 XR- 36双能 X射线骨密度测定等方法检测骨长、骨直径、骨面积和骨质量 ;以及骨矿含量等指标 .
- The results showed that it was difficult to ablate left bundle branch accurately only guided by left bundle branch potential,but it was successful to ablate it and to preventing complete AVB with the X ray image localization. 研究还发现仅以标测到的左束支电位难以准确消融左束支 ,而单纯以X线影像定位就能成功阻断左束支。
- The application of a lossless compressioin algorithm, based on the R,G,B value of pixel, to a X ray analyzing system is introduced through some medical examples of the X Ray image. 以医用X射线灰度图像为例,介绍基于象素R,G,B值的无损压缩算法在X射线图像分析系统中的应用。
- The X-ray intensities were monitored by proportional counters, we obtained sensitivity curves of Kodak SWR X-ray film for these different energy X rays. 利用流气式正比计数管监测X射线强度,测得了Kodak SWR底片对以上四种能量的X光的响应曲线。