目的　探讨螺旋CT在经皮穿刺射频治疗肿瘤中的应用技术及价值。方法　对 36例胸腹部肿瘤在螺旋CT导引下经皮穿刺射频治疗 ,其中术后 1～ 3月螺旋CT复查 1 6例。结果　 36例胸腹部肿瘤全部穿刺成功 ,完成射频治疗。射频术后立即显示肿瘤内均出现大小不等的散在低密区 ;复查 1 6例中 ,62 5 %的患者肿瘤不同程度缩小 ,1 2 5 %的患者肿瘤大小无变化 ,2 5 %的患者肿瘤较术前增大 ;瘤体CT值有不同程度下降。结论　螺旋CT在导引穿刺射频治疗、判断疗效及监测并发症方面能发挥重复作用 Objective To investigate the technique and value of spiral CT in the treatment of tumors by percutaneous radiofrequency. Methods Thirty - six patients with thoraco - abdominal tumors underwent radiofrequency catheter ablation guided by spiral CT, of which 16 cases were retrospectively analyzed by spiral CT from January to March. Results Thirty-six thoracic and abdominal tumors were successfully punctured and radiofrequency ablation was completed. Immediately after radiofrequency, tumors appeared in different sizes in the scattered scattered low-density areas; review of 16 cases, 62.5% of patients with varying degrees of tumor shrinkage, 125% of patients had no change in tumor size, 25% of patients Tumor increased compared with preoperative; CT value of the tumor decreased to varying degrees. Conclusions Spiral CT can play a role in guiding radiofrequency ablation, judging curative effect and monitoring complication