Objective To investigate the value of triple-phase enhanced target scan with multi-slice computed tomography (MSCT) in the diagnosis of early peripheral lung cancer (EPLC). Methods Sixty-two cases of solitary pulmonary nodules with suspected EPLC underwent triple-phase enhanced target scan on a 16-row MSCT scanner (Somatom Sensation 16, Siemens). Results All the 62 cases were confirmed pathologically,including EPLC in 51,tuberculoma in 3,inflammatory nodules in 4, lung cyst containing liquid in 2 and cryptococcosis in 2. The net increase in CT value in pulmonary phase was less than 20 HU in 46 cases of EPLC. The net increase in CT value in arterial phase and delayed phase net was more than 20 HU in all EPLC cases. Among the 62 cases, 48 showed homogeneous enhancement and 9 showed heterogeneous enhancement. Conclusion The EPLC shows certain characteristics in triple-phase enhanced target MSCT scan,which can be used to improve the accuracy of EPLC diagnosis.%目的 探讨MSCT三期增强靶扫描诊断早期周围型肺癌的价值.方法 选择62例疑为早期周围型肺癌的孤立性肺结节(SPN)为研究对象,进行MSCT三期增强靶扫描,所用机型为Siemens Samatom Sensation 16排螺旋CT机.结果 62例SPN均经病理证实,其中早期周围型肺癌51例,结核球3例,炎性结节4例,肺含液囊肿2例,隐球菌病2例;51例早期周围型癌中,46例在肺动脉期CT净增值在20 HU以下,主动脉期和延迟期的早期周围型肺癌CT净增值超过20 HU;所有病例中48例表现为均匀强化,9例表现为不均匀强化.结论 早期周围型肺癌的MSCT三期增强靶扫描强化具有一定的特征性,掌握其强化特征,有助于提高其诊断准确率.
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