16层螺旋CT薄层及后处理影像显示肺叶间裂  

Interlobar Fissure of Lung Displayed by 16-detector Row Spiral CT with Thinner Slices and Post-processing Imaging

作　　者：薛贞龙[1] 李一鸣[1] 李澄[1] 成维艳[1] 

机构地区：[1]扬州市第一人民医院影像科,江苏扬州225001

出　　处：《中国医学影像学杂志》2013年第7期539-542,共4页Chinese Journal of Medical Imaging

摘　　要：目的探讨16层螺旋CT薄层及后处理影像对显示肺叶间裂的价值。资料与方法对60例胸部16层螺旋CT检查未见异常者,行重建薄层影像,比较斜裂显示率;行多平面重组(MPR)及表面遮盖显示(SSD)后处理;观察薄层(1.25mm)及后处理影像上水平裂的显示及不完全叶间裂与副裂的显示情况,评价25例病灶邻近叶间裂患者CT薄层及后处理影像上病灶与叶间裂的关系。结果在层厚1.25、2.50、3.75mm影像上,斜裂为线样影的显示率分别为90.0%、81.25%、42.5%。层厚2.50mm影像上线样影的显示率高于层厚3.75mm影像(χ2=24.754,P<0.001),层厚1.25mm影像上线样影的显示率高于层厚2.50mm影像(χ2=10.228,P<0.01)。层厚1.25mm时,73.3%的水平裂显示为带状影,23.3%呈线样影,水平裂在MPR与SSD上显示为细线影;不完全叶间裂的显示率为45.0%,副裂的显示率为35.0%。薄层影像、MPR和SSD可以清楚地显示病变与叶间裂的关系,表现为病变牵拉、推压及跨越叶间裂。结论层厚1.25mm时,叶间裂及变异的显示更加清晰,MPR与SSD可以清晰地显示斜裂与水平裂,以及病变与叶间裂的关系。Purpose To investigate the value of display for the interlobar fissure by 16-detector row spiral CT and post-processing imaging. Materials and Methods The thin layer images of 16-detector row spiral CT of sixty patients without any abnormity were reconstructed, and the oblique fissure show-up ratio was compared using multiplanar reconstruction （MPR） and shade surface display （SSD）. The horizontal fissure, incomplete interlobar fissure and accessory fissure on thin layer （1.25 ram） and post-processing images was observed and the relationship was evaluated for the lesion near the interlobar and interlobar of 25 patients on thin layer and post-processing images. Results The show-up ratios of linear shadow of oblique fissure were 90.0%, 81.25% and 42.5% oll thickness of 1.25 ram, 2.50 mm and 3.75 mm images, respectively. The show-up ratio of linear shadow on thickness of 2.50 mm was higher than that of the images of 3.75 mm （χ2=24.754, P〈0.001）, while the linear shadow of thickness of 1.25 mm images was higher than that of the images of 2.50 mm （χ2=10.228, P〈0.01）. On the images of thickness of 1.25 ram, 73.3% of horizontal fissure showed banding shadow, 23.3% showed linear shadow, and the horizontal fissure showed linear shadow on MPR and SSD; the show-up ratio of incomplete interlobal fissure and accessory fissure were 45.0% and 35.0%, respectively. The thin layer images, MPR and SSD could clearly show the relationship of lesion and interlobar fissure, which represent as the lesion pull, push and step over the interlobar fissure. Conclusion On thickness of 1.25 ram, the interlobar fissure and its variation shows more clearly, and the MPR and SSD can clearly show the relationship of oblique fissure and horizontal fissure, the lesion and interlobar fissure.

关 键 词：体层摄影术 螺旋计算机 肺 肺疾病 图像处理 计算机辅助 

分 类 号：R563[医药卫生—呼吸系统] R445.3[医药卫生—内科学]