“等密度”的英语可以翻译为：equidensite，equidensity ...

本文用光学方法实现了图象等密度假彩色编码.An optical method of pseudocolor equidensity encoding of photographic image is described.如骨等密度较高的组织能吸收更多的X射线,所以在 X 光片上显示出来的是较淡的区域.Denser tissues, as Bones, absorb more X rays and show as lighter area...