Skubic S E, Fatouros P P
Radiology. 1986 Oct;161(1):263-70. doi: 10.1148/radiology.161.1.3763877.
The increased use of mammography has brought into focus the necessity for radiation dose reduction. In particular, the effect of radiographic technique on radiation dosimetry is not well documented. In this paper, the dependence of absorbed dose on radiographic modality, radiographic technique, and breast thickness is studied, with the following principal results: Breast thickness and incident half-value layer (HVL) are sufficient to characterize the normalized (mrad/incident roentgen) breast dose. The average breast dose depends on both beam HVL and kVp; the dependence on breast thickness is more pronounced for screen-film mammography, indicating the need for firm compression. Screen-film mammography shows substantial dose savings over xeromammography for thinner breasts imaged without a grid; this dose advantage disappears for thicker breasts and is generally reversed when a grid is used.
乳腺X线摄影的使用增加，使得降低辐射剂量的必要性成为焦点。特别是，放射成像技术对辐射剂量测定的影响尚未得到充分记录。本文研究了吸收剂量对放射成像方式、放射成像技术和乳房厚度的依赖性，主要结果如下：乳房厚度和入射半值层（HVL）足以表征归一化（毫拉德/入射伦琴）乳房剂量。平均乳房剂量取决于射线束HVL和千伏峰值（kVp）；对于屏-片乳腺摄影，对乳房厚度的依赖性更为明显，这表明需要进行有力的压迫。对于未使用滤线栅成像的较薄乳房，屏-片乳腺摄影显示出比干板乳腺摄影大幅节省剂量；对于较厚乳房，这种剂量优势消失，并且在使用滤线栅时通常会逆转。
