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单词 contrast medium
释义 contrast medium【医】 造影剂, 对比剂 contrast medium  contrast medium  n.(名词)A substance, such as barium or air, used in radiography to increase the contrast of an image. A positive contrast medium absorbs x-rays more strongly than the tissue or structure being examined; a negative contrast medium, less strongly.反差媒质:射线照相中用来提高图象明暗反差的物质,如钡或空气。正片的反差媒质比起被检测的组织或结构来吸收X光射线的能力要强;负片的反差媒质则较之弱些
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