这个词是什么意思？
A collective term for interstitial, intracavity, and surface radiotherapy. It uses small sealed or partly-sealed sources that may be placed on or near the body surface or within a natural body cavity or implanted directly into the tissues.
中文名称索引；定义为 MeSH 英文原文，尚未逐条译审。MESH:D001918 · MeSH 2026。
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