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目的对比分析良恶性肺内孤立性结节的影像学表现,总结诊断经验。方法 2014年1月至2016年10月,医院诊断肺内孤立性结节84例,回顾性分析,对比良恶性结节的形态学、灌注参数。结果检出孤立性肺结节144个,其中诊断为肺癌56个,其余均为良性病变;影像学综合诊断敏感度89.29%(50/56),特异度80.68%(71/88),符合率84.03%(121/144);BF、BV、MTT、PS、90s强化值截断值诊断ADU分别为0.79、0.79、0.80、0.77、0.79,进行两个及以上的指标组合诊断,MTT联合90s强化值诊断ADU最高达到0.91。结论 CT是诊段肺孤立性结节的主要方法,动态增强扫描灌注模式获得足够多的量化指标,通过不同指标组合诊断可极大的提高诊断效用;MTT联合90s强化值诊断肺内孤立性结节的效果较好。
Objective To compare the imaging findings of solitary nodules in benign and malignant lungs and summarize the experience of diagnosis. Methods From January 2014 to October 2016, 84 cases of solitary pulmonary nodules were diagnosed by the hospital, and the morphological and perfusion parameters of benign and malignant nodules were compared retrospectively. Results A total of 144 isolated pulmonary nodules were detected, of which 56 were diagnosed as lung cancer. The others were all benign lesions. The sensitivity of comprehensive radiological diagnosis was 89.29% (50/56) and specificity was 80.68% (71/88) 84.03% (121/144). The diagnostic value of the cut-off value of BF, BV, MTT, PS and 90s were 0.79,0.79,0.80,0.77,0.79, respectively. The combination of two or more indicators of diagnosis, MTT combined with 90s value Diagnostic ADU up to 0.91. Conclusions CT is the main method of diagnosis of solitary pulmonary nodules. Dynamic enhancement scanning perfusion model can obtain enough quantitative indexes, which can greatly improve diagnostic utility through combination of different indexes. MTT combined with 90s enhanced value can diagnose solitary pulmonary nodules The effect of the festival is better.