目的 :研究HRCT靶重建技术在尘肺诊断中的应用价值及其影像学表现。方法 :对 5 7例各期煤工尘肺作肺部常规CT扫描 ,然后在主动脉弓顶、隆突水平、气管分叉下 3cm、右膈上 2cm及兴趣区加作HRCT ,并利用所贮存扫描之原始数据进行靶重建。结果 :HRCT靶重建放大成像清晰地显示了尘肺的微细病变 :(1)结节影 10 0 % ;(2 )小叶间隔增厚 98.2 4% ;(3)小叶结构异常98.2 4% ;(4)胸膜下结节 84.2 1% ;(5 )小叶中心型肺气肿 6 3 .15 % ;(6 )胸膜下弧线影 6 4.91% ;(7)小支气管扩张 6 3 .15 % ;(8)磨玻璃样阴影 35 .0 8% ;(9)蜂窝状阴影 15 .78%。并良好的显示了早期病变细节。结论 :HRCT靶重建技术提高了细节显示 ,是显示尘肺微细病变有效而可靠的方法 ,可提供更多的诊断信息。 Objective: To study the value of HRCT target reconstruction in the diagnosis of pneumoconiosis and its imaging findings. Methods: Conventional pulmonary CT scans were performed in 57 cases of coal worker’s pneumoconiosis. HRCT was performed on the aortic arch, carina, 3cm below the trachea, 2cm above the right diaphragm, and the region of interest. The original data is for target reconstruction. Results: The HRCT target reconstruction and magnification imaging clearly showed the tiny lesions of pneumoconiosis: (1) the nodules were 100%; (2) the interlobular septal thickening was 98.2 4%; (3) the lobular structure was abnormally 98.2%; (4) Subpleural nodules 84.2 1%; (5) centrilobular emphysema 6 3 .15%; (6) subpleural arc shadow 4.91%; (7) bronchodilation 6 3 .15%; (8) Grinding glass-like shadows 35.0%; (9) Honeycomb shadows 15.78%. And a good display of early lesion details. CONCLUSIONS: The HRCT target reconstruction technique improves the detail display and is an effective and reliable method of displaying Pneumoconiosis, providing more diagnostic information.