CT薄层增强扫描对良恶性肺结节的鉴别诊断

目的探讨CT增强扫描对鉴别良恶性肺结节的价值。方法89例肺结节中，恶性63例（均为肺癌），良性26例。分别于注射100ml造影剂前及注射开始后的35s、2min及5min对病灶进行薄层平扫及增强扫描。观察病灶的强化程度及强化特征，并进行CT-病理对照研究。结果肺癌的强化程度显著高于良性肺结节(P<0.02)。在强化特征方面27例肺癌出现高密度点条征；51例肺癌和4例良性结节强化不均匀；3例肺癌和4例良性结节强化均匀；5例结核球和1例炎性假瘤呈环状强化；12例结核球无强化。结论CT增强扫描对良恶性肺结节的鉴别诊断有较重要的价值。

Differential diagnosis of pulmonary nodules by using enhanced CT with iodinated contrast material

Objective To evaluate pulmonary nodules by using enhanced CT. Methods 89 patients with pulmonary nodules included 63 pulmonary carcinomas and 26 benign pulmonary nodules Thin slice CT was performed before injection, 35 s,2 min and 5 min after injection of 100 ml of contrast material at 2 ml/s The maximum level of enhancement and the enhanced patterns were recorded. Results Lung carcinomas enhanced significantly more than benign nodules 27 lung carcinomas showed the sign of enhanced spots and twigs; 51 lung carcinomas and 4 benign nodules showed inhomogeneous enhancement; 3 lung carcinomas and 4 benign nodules had homogeneous enhancement; 5 tuberculomas and 1 inflammatory pseudotuma appeared ring enhancement; 12 tuberculomas showed nonenhancement. Conclusion Enhanced CT is a valuable method to differentiate pulmonary carcinomas from benign pulmonary nodules