多层螺旋CT多平面重组对周围型肺癌空洞常见征象检出价值

目的：探讨多层螺旋CT多平面重组（MPR）对周围型肺癌空洞常见征象的检出作用。方法：搜集经病理证实的110例周围型肺癌空洞的多层螺旋CT资料,其中60例进行了MPR。对比分析多层螺旋CT横轴面薄层图像与MPR图像对周围型肺癌空洞常见CT征象的检出作用。结果：110例周围型肺癌空洞横轴面薄层CT图像中,空洞外缘分叶征、毛刺征、空洞内壁不光整、偏心性空洞、支气管血管集束征分别有80例（72.7%）、72例（65.5%）、85例（77.3%）、83例（75.5%）、70例（63.6%）。行MPR的60例周围型肺癌空洞中,上述征象在MPR图像上分别检出56例（93.3%）、50例（83.3%）、55例（91.7%）、50例（83.3%）、46例（76.7%）,其中空洞外缘分叶征、毛刺征、空洞内壁不光整、支气管血管集束征的检出率均明显高于横轴面薄层图像（χ^2值分别为10.083、9.091、7.111、6.125,P〈0.01）,偏心性空洞的检出率略高于横轴面薄层图像,差异无显著性意义（χ^2=3.200,P〉0.05）。结论：MPR可提高周围型肺癌空洞常见CT征象的检出率,有利于周围型肺癌空洞的CT诊断。

Value of multiplanar reconstruction with multislice spiral CT in detecting the frequent signs of peripheral lung cancer cavity

Objective：To study the role of multiplanar reconstruction（MPR） with multislice spiral CT in detecting the frequent signs of peripheral lung cancer cavity.Methods：Multislice spiral CT findings of 110 cases of peripheral lung cancer cavity proved by pathology were collected.MPR was performed in 60 cases.The detection rates of the frequent signs of peripheral lung cancer cavity on MPR images were compared with the results of thin cross-sectional images.Results：On the cross-sectional images of the 110 cases,there were lobulation in 80 cases（72.7%）,spiculation in 72 cases（65.5%）,mural rugosity in 85 cases（77.3%）,eccentric cavity in 83 cases（75.5%） and bronchovascular convergence in 70 cases（63.6%）.On MPR image of the 60 cases,these signs were 56 cases（93.3%）,50 cases（83.3%）,55 cases（91.7%）,50 cases（83.3%） and 46 cases（76.7%）,respectively.The detection rates of lobulation and spiculation,mural rugosity and bronchovascular convergence on MPR images was statistically higher than those on thin cross-sectional images,where χ^2=10.083,9.091,7.111 and 6.125,respectively,and P〈0.01.The detection rate of eccentric cavity on MPR images was slightly higher than that on thin cross-sectional images,but the difference was not statistically significant（χ^2=3.200,P〉0.05）.Conclusion：MPR can improve the detection of the frequent signs of peripheral lung cancer cavity on multislice spiral CT,which are helpful for the diagnosis of peripheral lung cancer cavity.