Objective: To compare dosimetry of 3D-CRT and IMRT plan for para-aortic lymph node tumor metastasis.

目的：比较腹主动脉旁淋巴结肿瘤转移的3D-CRT和IMRT放射治疗计划的剂量学差异。

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Result: Ultrasonic indirect sign of left larynx return nerve constricted must be depend on sign of left pulmonary constricted by lymph node mass from below aortic arch 3 cases;

结果：以左肺动脉受肿块压迫的表现，间接提示左喉返神经压迫征，分别来自主动脉弓下肿大淋巴结3例；

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Result: Ultrasonic indirect sign of left larynx return nerve constricted must be depend on sign of left pulmonary constricted by lymph node mass from below aortic arch 3 cases;

结果：以左肺动脉受肿块压迫的表现，间接提示左喉返神经压迫征，分别来自主动脉弓下肿大淋巴结3例；

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