这个词是什么意思？
X-RAY examination of LOWER GASTROINTESTINAL TRACT. Imaging is done while a BARIUM COMPOUND (e.g., BARIUM SULFATE) fills the large intestine via the rectum as a CONTRAST MATERIAL.
中文名称索引；定义为 MeSH 英文原文，尚未逐条译审。MESH:D000071941 · MeSH 2026。
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