螺旋CT容积再现和最大强度投影技术在儿童骨骼异常中的临床应用  

Clinical Application of Volume Rendering and Maximum Intensity Projection Technique of Spiral CT for Skeletal Abnormality in Children

作　　者：白万晶[1] 李真林[2] 宁刚[1] 李学胜[1] 陈锡建[1] 

机构地区：[1]四川大学华西第二医院放射科,成都610041 [2]四川大学华西医院放射科,成都610041

出　　处：《华西医学》2016年第1期82-86,共5页West China Medical Journal

摘　　要：目的探讨容积再现（VR）和最大强度投影（MIP）两种螺旋CT三维重组技术在评价儿童骨骼异常中的应用价值。方法收集2014年3月-6月来四川大学华西第二医院检查的患儿中,螺旋CT横断层图像及多平面重组诊断为骨骼异常的患儿18例,对其原始数据进行VR和MIP。由2名放射科医师独立评价所有三维图像（1-4分）,4分者能完全诊断病变。对所有评分进行Wilcoxon秩和检验,分别计算Kappa值。结果 VR和MIP的图像评分分别为（3.28±0.96）分和（2.89±0.90）分,差异无统计学意义（Z=-1.732,P=0.125）。VR和MIP的Kappa值分别为0.730和0.593,具有高度和中度一致性。结论 VR和MIP在显示空间立体结构方面有独到的优势,能辅助CT二维图像,更加全面、综合地评估儿童骨骼异常。Objective To discuss the application value of the two kinds of three dimensional reformatting techniques of spiral CT：volume rendering（VR） and maximum intensity projection（MIP） in the evaluation of children＇s skeletal abnormality.Methods Eighteen children with skeletal abnormality in our hospital treated between March and June 2014 were recruited in this study,diagnosed by CT transversal images and images of multiplanar reformatting（MPR）.VR and MIP were made with the raw data.All three dimensional images were independently evaluated by two doctors of the Radiology Department（a score of 1- 4）.Images with a score of 4 were excellent.Wilcoxon signed ranks test was done for all scores and Kappa values were calculated.Results Images score of VR was 3.28 ± 0.96 and of MIP was 2.89 ± 0.90,without statistically significant difference（Z=- 1.732,P= 0.125）.Kappa value of VR was 0.730 and of MIP was 0.593,with good and moderate consistency.Conclusion With the special superiority of displaying spatial configuration,VR and MIP can be used to help two dimensional CT images to evaluate children＇s skeletal abnormality more comprehensively.

关 键 词：儿童 骨骼异常 体层摄影术 X线计算机 容积再现 最大强度投影 

分 类 号：R726.8[医药卫生—儿科] R816.8[医药卫生—临床医学]