SPECTRAL DEPENDENCE OF GLANDULAR TISSUE DOSE IN SCREEN-FILM MAMMOGRAPHY
SPECTRAL DEPENDENCE OF GLANDULAR TISSUE DOSE IN SCREEN-FILM MAMMOGRAPHY
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DOI：
10.1148/radiology.179.1.2006265
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发表时间：
1991-04-01
期刊：
影响因子：
19.7
通讯作者：
TUCKER, DM
中科院分区：
文献类型：
--
作者：
WU, XZ;BARNES, GT;TUCKER, DM
乳房X线摄影中的平均腺体组织剂量通常根据已发表的表格确定，并了解乳房入口皮肤暴露、X射线管靶材料、射束质量（半值层[HVL]）、乳房厚度和乳房成分。 使用精心设计和实验验证的蒙特卡罗模拟，作者发现，平均腺体剂量也取决于X射线管电压，并在较小程度上，对X射线管电压波形。 对于目前采用的钼靶-钼过滤源组件，在估计用不同X射线管电压但用相同HVL获得的平均腺体剂量时，10%或更大的剂量差异是可能的。 给出了不同管电压和管电压波形以及不同乳房厚度和成分以及射束过滤的归一化平均腺体组织剂量，单位为每单位入射皮肤暴露的辐射吸收剂量。
The average glandular tissue dose in mammography is generally determined from published tables with knowledge of the breast entrance skin exposure, x-ray tube target material, beam quality (half-value layer [HVL]), breast thickness, and breast composition. Using a carefully designed and experimentally validated Monte Carlo simulation, the authors found that average glandular dose also depends on x-ray tube voltage and, to a lesser extent, on x-ray tube voltage waveform. For currently employed molybdenum target-molybdenum filter source assemblies, a difference in dose of 10% or more is possible in estimating the average glandular dose obtained with different x-ray tube voltages but with the same HVL. Presented are normalized average glandular tissue doses in units of radiation absorbed dose per unit entrance skin exposure for different tube voltages and tube voltage waveforms as well as for different breast thicknesses and compositions and beam filtrations.