Sometimes during cardiac MRI, a specialdye is injected into a vein to help highlight the heart or blood vessels on the images.
有时候在进行心脏磁共振成像检查中，需要向静脉注射一种染剂以提高图片中心脏和血管的亮度。
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During coronary angiography, a thin tube (catheter) is threaded through a blood vessel into the heart, where a specialdye is injected.
在冠状动脉造影时，一个细管(导管)通过血管进入心脏，注入一种特殊的染料。
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