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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。
- The reemission delay times of Au disk vs X rays photon energy were given and compared with recent experimental results. 在各种因素的影响下, X光各能区再发射的延迟时间的变化趋势与实验结果一致的。
- 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。
- 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。
- 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 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。
- The bone mineral density(BMD) and Z score in distal 1/3 radius were measured with dual energy X ray absorptiometry(DEXA) in 185 hemodialysis(HD) patients, meanwhile serum parathyroid hormone(PTH), alkaline phosphatase(ALP) and hand X rays were detected. 采用双能X线骨密度测定法检测 185例慢性肾衰血透患者的桡骨骨密度 (BMD) ,计算其Z值 ,同时检测其血清甲状旁腺素 (PTH) ,碱性磷酸酶 (ALP)和指骨X照片。
- MEASUREMENT OF BODY COMPOSITION WITH DUAL ENERGY X RAY ABSORPTIOMETRY 利用双能X射线吸收法测量体成分
- With high energy photon beam attenuated by the couch insert and immobilization devices, the skin sparing effect will be reduced. 当高能光子射束穿过治疗床及固定模具而衰减时，会造成皮肤免除效应降低。
