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从１９９２年７月至１９９４年１２月，５６例Ⅰ，Ⅱ期鼻咽癌作外照射（鼻咽Ｄ＿Ｔ５６～６０Ｇｙ／２８～３０次／５．６～６周）加腔内后装治疗（２４Ｇｙ／３次／２周），另配对５６例作单纯外照射（鼻咽Ｄ＿Ｔ６６～７０Ｇｙ／３３～３５次／６．６～７周）。经治疗计划系统绘测的剂量分布图显示，外照射加腔内后装综合放疗的鼻咽剂量为７０－８０Ｇｙ，鼻腔后份和茎突前间隙的剂量为６０～７０Ｇｙ。提示腔内后装配合外照射可适用于鼻咽腔内肿瘤或侵犯鼻腔后份以及部分茎突前间隙的病例。
From July 1992 to December 1994, 56 cases of stage I and II nasopharyngeal carcinoma were treated with external irradiation (nasopharyngeal D_T56 ~ 60Gy / 28 ~ 30 times / 5.6 ~ 6 weeks) / 3 times / 2 weeks), and the other pairs of 56 cases for simple external irradiation (nasopharyngeal D_T66 ~ 70Gy / 33 ~ 35 times /6.6 ~ 7 weeks). The dose distribution chart plotted by the treatment planning system shows that the dose of nasopharyngeal radiation after external beam irradiation and intracavitary combined radiotherapy is 70-80 Gy, and the dose in the posterior nasal and styloid processes is 60-70 Gy. Prompt chamber fitted with external irradiation can be applied to the nasopharyngeal tumor or infringe the nasal cavity and some of the cases before the styloid process.