| 摘要 |
It is intended to provide means for more clearly showing an image of fluorescent staining of a lumen of the digestive tract. The present invention provides an agent for enhancing a contrast of an image of fluorescent staining of a lumen of the digestive tract with an intravenously administered fluorescent dye, wherein the agent for enhancing a contrast is an agent for a lumen of the digestive tract containing an aqueous solution having a buffer capacity and having a pH of 6 to 10.
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