对于低吸收物体或组织密度差异小的物体，位相对比成像显示出一些吸收对比成像所无法显示的组织结构；
XPCI of low-absorption objects or little absorption variation objects showed some structure that could not be demonstrated in absorption contrast images.
对于低吸收物体或组织密度差异小的物体，位相对比成像显示出一些吸收对比成像所无法显示的组织结构；
XPCI of low-absorption objects or little absorption variation objects showed some structure that could not be demonstrated in absorption contrast images.
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