Objective: To analyze the causes of posture errors in conventional radiotherapy of the nasopharyngeal carcinoma, seek methods of rectification.
目的：分析鼻咽癌常规放射治疗摆位误差的原因，寻求解决摆位误差的方法。
Objective: To analyze the causes of posture errors in conventional radiotherapy of the nasopharyngeal carcinoma, seek methods of rectification.
目的：分析鼻咽癌常规放射治疗摆位误差的原因，寻求解决摆位误差的方法。
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