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1 概述肝肿瘤经皮射频切除术 (ｒａｄｉｏ ｆｒｅ ｑｕｅｎｃｙａｂｌａｔｉｏｎ ;ＲＦＡ)是在影像学导向下把射频电极穿刺入肿瘤内 ,利用射频热效应造成肿瘤组织凝固性坏死而达到治疗肿瘤的目的。其机制是射频电磁波(常用 46 0～ 5 0 0ｋＨｚ)可使电极周围组织中的离子发生震
1 Introduction Radiofrequency resection (RFA) of liver tumors is the radiographic electrode-guided puncture into the tumor, the use of radiofrequency thermal effects caused by coagulation necrosis of tumor tissue to achieve the purpose of treatment of tumor. The mechanism is that radio frequency electromagnetic waves (usually 460-500 kHz) can shock the ions in the tissues around the electrodes.