摘要
目的 :采用同层动态CT增强评价肺孤立性结节。方法 :选择 41例直径≤ 4cm的肺孤立性结节进行研究 ,其中肺癌 2 9例 ,肺结核球 7例 ,肺炎性结节 3例 ,肺错构瘤 2例。静注碘剂 10 0ml前后 ,对病灶中心作薄层扫描 ,测量增强前后CT值。结果 :肺癌和肺炎性结节显著强化 ,肺结核球和肺错构瘤轻度强化或不强化 ,肺癌和肺结核在 75s和 13 5s时间段增强比较中均有统计学显著性差异 (P <0 .0 5 )。结论 :①动态CT增强对肺癌与肺结核球等结节的鉴别极有价值 ,并可将增强后CT净增值 <2 0HU ,作为良恶性结节的阈值指标 ;②动态CT增强中应重视淋巴结的观察 ,有利于SPN的定性诊断。
Objective:To evaluate application of dynamic enhanced CT in evaluation of solitary pumonary nodules(SPN).Methods:Incremental dynamic enhanced computer tomography was employed to evaluate solitary pumonary nodules(SPN).The patients with SPN of diameter≤4cm had 29 malignant nodules,7 tuberculomas,3 inflammatory nodules and 2 hamartoma.Thin section CT scan through the center of the nodules was performed before and after the injection of 100ml iodinated contrast material.The CT values of the nodules were calculated before and after contrast administration.Results:All malignant and inflammatory nodules showed significant enhancement,but tuberculomas and hamartoma showed little or no enhancement at all.Lung cancer had significant difference from tuberculomas at the time 75 and 135 minutes( P <0.05).Conclusion:①Dynamic enhanced CT is very valuable in identifying the malignant nodules from tuberculomas and other benign nodules.The increased CT value of the same nodule with less than 20 HU after administration of contrast material can be regarded as a threshold to classify benign nodule from malignant nodules;②Emphasis should be laid on observation to the lymph nodes in the dynamic enhanced CT, which is beneficial to the diagnosis of SPN.
出处
《放射学实践》
2003年第3期178-180,共3页
Radiologic Practice
基金
东南大学基金课题 (XJ 0 2 67)
关键词
肺孤立结节
CT增强
肺肿瘤
Solitary pulmonary nodule(SPN)
CT,enhancement
Lung neoplasm
