周围型小肺癌在HRCT及多层螺旋CT增强扫描中的征象分析

Analyses of the signs of peripheral small lung cancer on high resolution CT and multi-slice spiral CT strengthened scanning

目的探讨周围型小肺癌在HRCT及多层螺旋CT强化扫描中的影像学表现及HRCT等技术在该疾病诊断中的价值。方法搜集经手术或穿刺病理证实的周围型小肺癌(直径≤3cm)52例,全部型HRCT扫描,分析其各种CT征象。其中29例行多层螺旋CT强化扫描,对病灶强化前后CT值增幅特点进行分析。结果HRCT表现1分叶征92.3%);2毛刺征(86.5%);3胸膜凹陷征(78.8%);4血管集束征(53.8%);5支气管充气征及空泡征(34.6%);6棘突征(36.5%)7磨玻璃样密度(11.5%);8钙化(9.6%)。强化前后CT值增幅20~30HU占20.6%,增幅30~65HU占72.4%,增幅>65HU占7%。结论 HRCT及多层螺旋扫描是周围型小肺癌诊断中重要的检查方法,诊断可靠,正确率达93%。

Objective To explore the imaging manifestations of peripheral small lung cancer on high resolution CT and MSCT strengthened scanning and their diagnostic value for this disorder.Methods The authors collected 52 patients with pathologicallyproved small peripheral lung cancer(than 3cm in diameter).All cases were scanned by high resolution CT and all kinds of CT signs were analyzed.MSCT strengthened scanning was done in 29 patients and the signs of increasing range of CT value in pre-and post-reinforcement were analyzed.Results The manifestations of high resolution CT scanning included:1lobulation sign(92.3%);2spicule sign(86.5%);3pleural indentation sign(78.8%);4vascularnotch sign(53.8%);5sign of air bronchus and vacuole(34.6%);6spinose processus(36.5%)7 milling glass dens(11.5%);and 8 calcification(9.6%).The increasing range of CT value in pre-and post-reinforcement was 20~30 HU(20.6%)and 30~65HU(72.4%),respectively,with amplification more than 65HU(7%).Conclusion High resolution CT and MSCT strengthened scanning are important methods in the diagnosis of peripheral small lung cancer,which are reliable,with accuracy up to 93%.