论文部分内容阅读
目的:探讨多层螺旋CT(MSCT)后处理技术在诊断早期周围型小肺癌中的临床应用价值。方法:选择经手术和病理检查证实的早期周围型小肺癌30例,行MSCT平扫及增强扫描,并分别采用多平面重建(MPR)、表面遮盖成像(SSD)和最大密度投影(MIP)进行图像重组。比较各重组图像与横断薄层图像对周围型小肺癌结节及其周围特征的显示情况。结果:MPR对分叶征、血管集束征、空气支气管征及阻塞征的显示率,显著高于横断薄层图像(P<0.05);SSD对分叶征、血管集束征的显示率,显著高于横断薄层图像(P<0.05);MIP对血管集束征的显示率显著高于横断薄层图像(P<0.05)。SSD、MIP对小空泡征、空气支气管征及阻塞征的显示率,分别显著低于横断薄层图像和MPR(P<0.05)。结论:MSCT后处理图像较横断薄层图像能够更直观、清晰、全面地显示周围型小肺癌结节及其周围组织的基本形态特征,在诊断早期周围型小肺癌方面具有重要价值。
Objective: To investigate the clinical value of multi-slice spiral CT (MSCT) post-processing in the diagnosis of early small peripheral lung cancer. Methods: Thirty patients with early-stage small lung cancer confirmed by operation and pathology were selected for MSCT plain scan and enhanced scan. Multiple planar reconstruction (MPR), surface occlusion imaging (SSD) and maximum density projection (MIP) were performed respectively. Image restructuring. Comparison of the reconstructed images and the transverse thin-section images showed the appearance of peripheral nodules and their surrounding features. Results: The display rate of MPR on leaflet sign, vascular bundling sign, air bronchus sign and occlusion sign was significantly higher than that on the transverse thin-section image (P <0.05). The display rate of SSD on segregation sign and vessel bundle sign was significantly higher (P <0.05). The rate of MIP clustering was significantly higher than that of transected slice images (P <0.05). The display rate of SSD and MIP on small vacuole sign, air bronchogram sign and occlusion sign were significantly lower than those on transverse slice image and MPR respectively (P <0.05). CONCLUSION: MSCT postprocessing images are more visual, clear and comprehensive than the thin-section images in the diagnosis of peripheral small lung cancer. It is of great value in the diagnosis of small peripheral lung cancer.