Swann C A, Kopans D B, McCarthy K A, White G, Hall D A
AJR Am J Roentgenol. 1987 Mar;148(3):525-6. doi: 10.2214/ajr.148.3.525.
We studied the relationship between the radiographic density of the breast as measured by parenchymal pattern vs age, breast size, thickness after compression, and compressibility. Two hundred consecutive women were evaluated. None of the three parameters or the patient's age correlated with the degree of radiographic density. Although more older women had lucent parenchyma, 37% of women more than 50 years of age had dense patterns. Thus, these factors cannot be used to predict radiographic density. Phototiming is required to maintain image quality, and only a test exposure can accurately predict breast density.
我们研究了通过实质模式测量的乳房射线密度与年龄、乳房大小、压缩后的厚度以及可压缩性之间的关系。对200名连续的女性进行了评估。这三个参数中的任何一个以及患者的年龄均与射线密度程度无关。尽管更多老年女性的实质呈透亮状，但50岁以上的女性中有37%的乳房模式呈致密状。因此，这些因素不能用于预测射线密度。需要进行光定时以维持图像质量，并且只有一次测试曝光才能准确预测乳房密度。
