The intensity of scattered radiation in mammography.
The intensity of scattered radiation in mammography.
复制标题
乳房X线照相术中散射辐射的强度。
作者：
Gary T. Barnes;Ivan A. Brezovlch
已测量了一系列X射线管电压、射野大小和体模厚度（代表临床乳腺摄影情况）的散射辐射与初级辐射的比值。测量的散射辐射的相对强度基本上是独立的kVp，但随着体模厚度和辐射场大小的增加而增加。对于代表临床情况的射野尺寸和体模厚度的范围，散射辐射的强度从初级射束强度的约40%到85%变化，这表明在乳房X线照相术中仅对初级射束对比度的约54%到71%成像。
The ratio of scattered-to-primary radiation has been measured for a range of x-ray tube voltages, field sizes and phantom thicknesses that typify clinical mammographic situations. The relative intensity of scattered radiation measured was essentially independent of kVp but increased as the phantom thickness and radiation field size increased. For the range of field sizes and phantom thicknesses that typify clinical situations the intensity of scattered radiation varied from about 40 to 85% of the primary beam intensity indicating that only from about 54 to 71% of the primary beam contrast is imaged in mammography.