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目的探讨多层螺旋CT各种后处理图像对尘肺早期诊断的应用价值。方法选取67例0+和Ⅰ期煤工尘肺患者,均仰卧位行螺旋扫描,获得高分辨容积数据,原始图像重建层厚10mm,分别获得肺窗和纵隔窗图像,扫描完结后,在工作站上对获得的容积数据进行高分辨1mm层厚轴位重建,及冠状位1mm多平面重建(MPR),并进行轴位与冠状位10mm层厚、5mm间隔最大密度投影(MIP)重建成像。结果多层螺旋CT可客观发现平片难以观察到的很多小阴影。多层螺旋CT与平片对比,圆形小阴影显示统计结果:p、q、r型结节,P<0.05;不规则型小阴影对照检验结果:s、t型结节,P<0.05;u型,P>0.05。结论多层螺旋CT比X线胸片及常规CT能更好地显示早期尘肺病变,在尘肺病变的早期发现、病灶形态分布方面具有较大潜力。
Objective To investigate the value of multi-slice spiral CT post-processing images in the early diagnosis of pneumoconiosis. Methods Sixty-seven patients with stage 0 + and stage I coal-mining pneumoconiosis were selected and scrolled in supine position to obtain high-resolution volume data. The original image was reconstructed to a thickness of 10 mm and the images of lung and mediastinum were obtained respectively. After scanning, The obtained volume data were reconstructed with high-resolution 1-mm slice thickness axial reconstruction and 1 mm multiplanar reconstruction (MPR) of the coronal plane. The axial and coronal 10 mm slice thickness and MIP reconstruction were performed at 5 mm intervals. Results Multi-slice spiral CT can objectively find many small shadows that are difficult to observe in plain film. The result of multi-slice spiral CT was compared with that of plain film. The small circular shadow showed statistical results: p, q, r type nodules, P <0.05; irregular small shadow control test results: s, u type, P> 0.05. Conclusions Multi-slice spiral CT is better than X-ray and conventional CT in detecting early pneumoconiosis. It has great potential in the early detection of pneumoconiosis and the distribution of lesions.