Burgess Arthur E, Kang Haejin
Radiology Department, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts 02115, USA.
Med Phys. 2004 Oct;31(10):2834-8. doi: 10.1118/1.1796091.
Flat-panel digital detector systems have limited dynamic range and saturate at a particular x-ray exposure. Hence some of the breast edge may not be represented in the displayed image. We developed a model to estimate the amount of skin loss. Model predictions agreed well with phantom measurements. In our database of 884 clinical digital mammograms, 98% had saturated backgrounds. The estimated skin loss exceeded 0.5 mm in 5% of images and 1.0 mm in 0.7% of images. Any skin thickening that is present should still be visualized, so we conclude that any skin-line loss may not be of clinical significance.
平板数字探测器系统的动态范围有限，在特定的X射线曝光下会饱和。因此，乳房边缘的某些部分可能不会在显示的图像中呈现出来。我们开发了一个模型来估计皮肤损失的量。模型预测与体模测量结果吻合良好。在我们884例临床数字乳腺X线摄影的数据库中，98%的图像背景出现饱和。在5%的图像中，估计的皮肤损失超过0.5毫米，在0.7%的图像中超过1.0毫米。任何存在的皮肤增厚仍应能够被观察到，所以我们得出结论，任何皮肤线损失可能不具有临床意义。
