| 双能X射线骨密度仪测定技术研究 |
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| 引用本文： | 秦林林 陈金标. 双能X射线骨密度仪测定技术研究[J]. 原子能科学技术, 1996, 30(3): 230-235 |
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| 作者姓名： | 秦林林 陈金标 |
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| 作者单位： | 中日友好医院临床医学研究所 |
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| 摘 要： | 以Ｌｕｎａｒ公司ＤＰＸ－Ｌ型双能Ｘ射线骨密度仪为例，研究引起测量误差的主要因素并提出质控措施。用自检模块、腰椎体膜评定仪器的体外测量精度好于１％。对１０位志愿者重复２次测量，体内精度对腰椎，ＭＰＤ（平均百分差）为０．４６，ＣＶ（变异系数）为０．７５；对股骨颈，ＭＰＤ为１．２６、ＣＶ为０．４７；Ｗａｒｄ’ｓ三角区ＭＰＤ为２．０１、ＣＶ为１．１４；大转子ＭＰＤ为１．６６、ＣＶ为０．７２。扫描图像由２位
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| 关 键 词： | 骨密度 双能X线吸收术 体外精度 体内精度 |
THE RESEARCH ON MEASURING PROCEDURE OF DUAL ENERGY X-RAY ABSORPTIOMETRY IN DETERMINING THE BONE MINERAL DENSITY |
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| Qin Linlin, Cheng Jingbiao, Zhang Wei, Ma Haibo, Ge Chunhua, Xiao Yexia. THE RESEARCH ON MEASURING PROCEDURE OF DUAL ENERGY X-RAY ABSORPTIOMETRY IN DETERMINING THE BONE MINERAL DENSITY[J]. Atomic Energy Science and Technology, 1996, 30(3): 230-235 |
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| Authors: | Qin Linlin Cheng Jingbiao Zhang Wei Ma Haibo Ge Chunhua Xiao Yexia |
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| Abstract: | The influence of measuring procedure on precision in determing the bone mineral density (BMD) using dual energy X-ray absorptionmetry (DXA) is studied. The research results show that the position of measured subjects and the analysis of acqured images are two main influence facfors. The precision of BMD values obtained from images analysed by two technicians is lower than that by one technician. For DXA of Lunar DPX-L, the vitro precision is better than 1 %. The vivo precision expressed by coefficient of variation (CV) are 0. 75% at lumbar, 0. 47 % at neck, 1. 14 % at Ward's triangle and 0. 72 % at trochanter, respectively. A suggestion for establishment of standard phantom of our country is proposed in the paper. |
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| Keywords: | Bone mineral density Dual energy X-ray absorptiometry Vitro precision Vivo precision |
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