For example, both CT and MRI often use substances, called contrast media, which show up clearly in the images and highlight some part of the body.

 
  • 例如计算机X射线断层造影术和核磁共振成像,都常使用被称为对比介质的物质,这些物质可显示更清晰的图像并突出身体的某些部分。
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