Externalradiationtherapy USES a machine outside the body to send radiation toward the cancer.
外部辐射疗法是用体外的机器向癌症进行辐射。
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Methods 120 cases all proved as nasopharyngeal neoplasms were treated with brachytherapy (15 ~ 30gy). These cases all had intracavitary residual tumors after full externalradiationtherapy.