论文部分内容阅读
目的探讨孤立性肺结节的CT薄层增强扫描方法和质量控制。方法对41例经手术病理证实的肺内孤立性结节的CT薄层增强扫描资料作回顾性分析,观察结节边缘、内部结构、大小、特殊征象及与周围组织的关系,增强前后CT值变化及强化规律、形态,对良、恶性结节的鉴别价值。结果薄层扫描技术,能更加清楚地显示结节的内部结构、边缘征象及其与周围组织的关系,恶性结节增强前后的CT值提高程度明显高于良性结节。恶性结节的主要强化形态是完全性强化或不规则强化。恶性结节增强后在动脉期CT值即升高,80s左右达强化峰值,然后逐渐下降;而良性结节增强后CT值上升缓慢,无明显峰值出现,包膜样强化或无明显强化。平扫和增强扫描诊断准确率分别为65.8%和90.2%。结论CT薄层增强扫描对良恶性肺结节的鉴别诊断有较高价值。薄层扫描、静脉内对比剂的正确使用以及结节强化CT值的准确测量是肺结节CT检查技术中的三个重要环节。
Objective To investigate the method and quality control of CT thin-section enhancement of solitary pulmonary nodules. Methods A retrospective analysis of 41 cases of solitary pulmonary nodules confirmed by surgery and pathology was performed to observe the relationship between the edge, internal structure, size, special signs and the surrounding tissues and CT value Change and strengthen the law, shape, good and malignant nodules of the differential value. Results Thin-layer scanning technique can show the internal structure of nodules and their relationship with the surrounding tissues more clearly. The enhancement of CT value before and after malignant nodules was significantly higher than that of benign nodules. The main enhancement of malignant nodules is complete or irregular enhancement. Malignant nodules increased in the arterial phase CT value rises, about 80s up to strengthen the peak, and then gradually decreased; benign nodules enhanced CT value increased slowly, no significant peak, capsule-like enhancement or no significant enhancement. The accuracy of plain scan and enhanced scan were 65.8% and 90.2% respectively. Conclusion CT thin layer enhanced scan of benign and malignant pulmonary nodules in the differential diagnosis of high value. The use of thin-layer scanning, the correct use of intravenous contrast agents, and the accurate measurement of nodules to enhance CT values are three important aspects of CT scan of lung nodules.