Study of the Thickness and Orientation of CT Maximum Intensity Projection on
Optimal Selection of Displaying Small Pneumoconiosis Nodules
WANG Chengxia1，LIU Cheng2，SUN Bingxin1，QIU Lu1，YAN Chengfeng1，ZHANG Yi2
1. Department of Radiology, Zibo Prevention and Treatment Hospital for Occupation Diseases, Zibo Shandong 255000, China丨
2. Shandong Medical Imaging Research Institute, Jinan Shandong 250021, China
Abstract：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 cm2, 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.
王成霞1，柳澄2，孙炳欣1，仇路1，闫成凤1，张翼2. 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[J]. 中国医疗设备, 2021, 36(10): 52-55.
WANG Chengxia1，LIU Cheng2，SUN Bingxin1，QIU Lu1，YAN Chengfeng1，ZHANG Yi2. Study of the Thickness and Orientation of CT Maximum Intensity Projection on
Optimal Selection of Displaying Small Pneumoconiosis Nodules. China Medical Devices, 2021, 36(10): 52-55.
