CT最大密度投影厚度与方位对显示尘肺小结节的优化选择研究  

Study of the Thickness and Orientation of CT Maximum Intensity Projection on Optimal Selection of Displaying Small Pneumoconiosis Nodules

作　　者：王成霞[1] 柳澄[2] 孙炳欣[1] 仇路 闫成凤 张翼[2] WANG Chengxia;LIU Cheng;SUN Bingxin;QIU Lu;YAN Chengfeng;ZHANG Yi(Department of Radiology,Zibo Prevention and Treatment Hospital for Occupation Diseases,Zibo Shandong 255000,China;Shandong Medical Imaging Research Institute,Jinan Shandong 250021,China)

机构地区：[1]淄博市职业病防治院放射科,山东淄博255000 [2]山东省医学影像研究所,山东济南250021

出　　处：《中国医疗设备》2021年第10期52-55,共4页China Medical Devices

基　　金：中国卫生监督协会2019年团体标准项目(44)。

摘　　要：目的探讨计算机断层扫描术(Computer Tomography,CT)不同投影厚度和投影方位的最大密度投影(Maximum Intensity Projection,MIP)图像对尘肺小结节显示的影响,以适当投影厚度和投影方位的MIP图像观察尘肺小结节。方法对30例尘肺患者肺部1mm层厚CT图像分别做投影厚度5、7、10mm的冠状位及轴位MIP图像,在同一患者不同投影厚度的冠状位和轴位图像中,选择小结节最密集的相同层面和位置画显示面积8 cm^(2)的正圆形作为感兴趣区,统计感兴趣区内小结节数量及显示情况,对比冠状位和轴位以及不同投影厚度的MIP对尘肺小结节显示的差异。结果本组病例投影厚度5、7、10mm轴位MIP及冠状位MIP感兴趣区内确定结节比率分别为60.16%、68.24%、67.00%,67.86%、73.26%、67.38%。结论冠状位投影厚度7 mm的MIP图像能更准确地显示尘肺小结节的数量,为尘肺病的诊断和分期提供更准确的依据。Objective To investigate the effect of computer tomography(CT)maximum intensity projection(MIP)images with different projection thickness and orientation on the display of pneumoconiosis nodules,and to observe pneumoconiosis nodules with MIP images with appropriate projection thickness and orientation.Methods CT images of lung 1 mm slice thickness in 30 patients with pneumoconiosis were performed on coronal and axial MIP images of projection thickness 5 mm,7 mm and 10 mm,respectively.In the coronal and axial images of the same patient with different projection thickness,the same plane and position with the densest nodules as a region of interest were selected to draw the positive circle of the display area of 8 cm^(2),and the number and display of small nodules in the interested area were counted.The differences of coronal and axial images of small pneumoconiosis nodules were compared,and the differences of MIP with different projection thickness on pneumoconiosis nodules were compared.Results The proportion of nodules identified in the projection thickness of 5 mm,7 mm,10 mm were 60.16%,68.24%,67.00%in axial MIP,and 67.86%,73.26%and 67.38%in coronal MIP,respectively.Conclusion MIP images of coronal projected thickness 7 mm are the most valuable in showing the number of small pneumoconiosis nodules and provide a more accurate basis for the diagnosis and staging of pneumoconiosis.

关 键 词：尘肺小结节 计算机断层扫描术 最大密度投影 投影厚度 

分 类 号：R135.2[医药卫生—劳动卫生] R814.42[医药卫生—公共卫生与预防医学]