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| 乳腺X射线基准装置半值层的测量 | |
| 引用本文： | 郭思明,刘莹,吴金杰.乳腺X射线基准装置半值层的测量[J].计量学报,2018,39(3):410-413. |
| 作者姓名： | 郭思明 刘莹 吴金杰 |
| 作者单位： | 1.中国计量科学研究院, 北京 100029 2.南华大学, 湖南 衡阳 421001 |
| 基金项目： | 质检公益性行业科研专项 (25-AHY1215) |
| 摘 要： | 用工业钼靶X射线光机作为基准的辐射源,自行设计了一种圆柱形自由空气电离室作为基准电离室。参考国际标准建立了4个规范辐射质,采用曲线拟合的方法测量了各辐射质的半值层、第二半值层和同质系数,并求出了各规范辐射质的有效能量。与国际计量局乳腺X射线基准的半值层数值进行对比,偏差在1%左右。 |
| 关 键 词： | 计量学 乳腺X射线 半值层 同质系数 |
| 收稿时间： | 2017-06-05 |
Half Value Layer Measurement of Mammography X-Ray Standard |
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| GUO Si-ming,LIU Ying,WU Jin-jie.Half Value Layer Measurement of Mammography X-Ray Standard[J].Acta Metrologica Sinica,2018,39(3):410-413. | |
| Authors: | GUO Si-ming LIU Ying WU Jin-jie |
| Affiliation: | 1. National Institute of Metrology, Beijing 100029, China 2. University of South China, Hengyang, Hunan 421001, China |
| Abstract: | The molybdenum target X-rays machine is used as the radiation source. A free air cylindrical chamber is designed for detecting photon.Four standard radiation qualities are established as per international standards file , the half-value layers, the second half value layer and homogeneous coefficients of each quality are measured by using curve fitting method, and standardize the quality of radiation energy can be calculated. Compared with that of BIPM, the HVL （half-value layer） deviation is around 1%. |
| Keywords: | metrology mammography x-rays half-value layer homogeneous coefficient |
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