作者：康晓斌1, 干茂2, 鄢铃3
作者单位：1. 青海红十字医院, 青海 西宁 810000;
2. 成都市疾病预防控制中心, 四川 成都 610041;
3. 中国测试技术研究院, 四川 成都 610021
关键词：QCT体模; 骨矿含量; 骨矿密度; 骨矿浓度; 线性减弱系数; 质量减弱系数
摘要：
研究在QCT骨密度测量中使用的羟磷灰石(Ca5OH(PO4) 3) 固体体模和磷酸氢二钾(K2HPO4) 液体体模的相互换算.根据这两种体模的X线辐射特性,利用CT值的定义及辐射计量常用数据,推导了这两种体模骨密度测量值的相互换算的公式,给出了在CT机上常用的60~100 keV X线能量范围内的相互换算数据,为两种体模在骨密度测量中进行相互比较提供了方便.
Two QCT phantom comparison analyses and their mutual conversion
KANG Xiao-bin1, GAN Mao2, YAN Ling3
1. Qinghai Red Cross Hospital, Xining 810000, China;
2. Chengdu Center for Disease Control and Prevention, Chengdu 610041, China;
3. National Institute of Measurement and Testing Technology, Chengdu 610021, China
Abstract: The article studied the mutual conversion between the bone mineral density measured with QCT hydroxyapatite(Ca5OH(PO4) 3) solid phantom and dipotassium phosphate(K2HPO4) liquid phantom. Based on X-ray radiation characteristics of the two phantoms, and used the definition of CT value and the commonly used radiation measuring data, it derived the mutual conversion formula for the measured bone mineral density from one phantom the other. It also gave the mutual conversion data for the commonly used X-ray energy window from 60 keV to 100 keV. This study will help for comparison the measured bone mineral density with two kinds of phantoms.
Keywords: QCT phantom; bone mineral content; bone mineral density; bone mineral concentration; linear attenuation coefficient; quality attenuation coefficient
2011, 37(5): 41-43 收稿日期: 2011-1-4;收到修改稿日期: 2011-3-21
基金项目:
作者简介: 康晓斌(1960-), 男, 工程师, 主要从事医疗设备管理及检测工作.
参考文献
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