摘要
目的:探讨三维重建成像对孤立性肺结节(SPN)形态特征的显示及其良恶性的诊断价值。方法:对37例SPN(直径<3cm)进行增强薄层扫描,利用三维成像软件用表面遮盖法(SSD)进行三维重建,调整阈值上、下限,分别观察结节的表面形态及与相邻胸膜、支气管、血管的关系,分析三维形态学改变对鉴别其良恶性的诊断价值。结果:3D CT完整显示了37例SPN立体形态和结节与周围血管的关系及血管类型,直观显示34例SPN相邻胸膜内外侧面形态改变和结节与周围支气管的关系,3D CT形态分型,在良恶性SPN上有差异。结论:三维重建技术不仅能三维显示SPN的异常表现,而且能显示结节与支气管、血管和胸壁是的解剖关系及形态学特征。3D CT结合2D CT有助于提高诊断准确性,是鉴别SPN良恶性的有效的影像学检查方法。
Objective：To assess the value of contrast enhanced CT 3D imaging in differentiating benign solitary pulmonary nodules （SPN） from malignant ones.Methods：Enhanced thin slice CT scanning was performed in 37 patients with SPN, and 3D reconstruction was made using SSD. By adjusting the lower and upper threshold of CT values, optimal surface features of the nodules and the adjacent structures, such as pleura, bronchi and vessels, were obtained respectively, and 3D images were evaluated for the differentiation of benign with malignant. Results：3D CT completely and stereoacopieally demonstrated the lesion＇s morphology, as well as the relation to the adjacent vessels in all 37 eases. The inner and outer pleurae near the lesion and the relationship between SPN and adjacent bronchi were well displayed in 34 cases. A difference in pattern classification on 3DCT was found between benign and malignant SPN. Conclusion： 3DCT can not only stereoscopically demonstrate the abnormal signs of SPN, but can also provide information concerning the anatomic relationship between SPN and adjacent bronchi, vessels and ehest wall. Combined 3D with 2DCT, the diagnosis can be improved.
出处
《医学影像学杂志》
2006年第7期708-710,共3页
Journal of Medical Imaging
