周围型小肺癌的CT征象分析

目的　进一步认识周围型小肺癌的CT征象 ,提高CT诊断正确率。方法　收集经手术病理证实直径≤ 3cm周围型小肺癌 63例 ,术前均行螺旋平扫。其中 2 8例加做了高分辨扫描 ,41例做了增强扫描。重点对病灶的形态、边缘征象、内部结构及增强程度进行总结分析。结果　 63例小肺癌中 ,具有深、浅分叶征 57例 ,毛刺征 56例 ,胸膜凹陷征 48例 ,血管束征 36例 ,小泡征 1 5例 ,空气支气管征 6例。 41例增强病例中 34例CT值增幅 >30HU。结论　CT显示有 3种边缘征象以上的肺部外围型结节应高度怀疑周围型肺癌 ;增强扫描对鉴别结节的良恶性很有帮助

Analysis of CT Signs of Small Peripheral Lung Cancer

Objective To understand further the CT signs of small peripheral lung cancer and to improve its diagnostic rate by CT.Methods 63 patients with small peripheral lung cancer(diameter was approximately 3 cm)were examined with spiral CT scanning before operation.All cases were confirmed by surgery and pathology.And additional high resolution spiral CT scanning was done in 28,and enhanced CT scanning was done in 41 of them.The size,edge signs,internal texture and enhanced degree were analyzed.Results Of 63 cases,CT findings included the lobular sign in shape in 57,burr sign in 56; sign of hollowed pleura in 48; sign of blood vessel bundle in 36; sign of small bubbles in 15; sign of air bronchus in 6.Of 41 cases with additional enhanced CT scanning, the increasing range in CT value of 34 cases was over 30 HU.Conclusion Peripheral pulmonary nodules which are of more than 3 edge signs on CT are highly suspected to be peripheral pulmonary carcinoma.Enhanced CT scanning is very helpful in distinguishing benign and malignant pulmonary nodules.