法医学杂志

• 论著 •    

MSCT图像后处理技术对肋骨骨折畸形愈合认定的应用价值

葛静晨1(), 尚敏2, 姚明阳3, 韦铭菲1, 史俊展1, 姚泽伟1,4, 时佳音2, 李凡1()   

  1. 1.河南科技大学基础医学与法医学院,河南 洛阳 471023
    2.郑州大学附属洛阳中心医院周山院区医学影像科,河南 洛阳 471003
    3.河南金剑司法鉴定中心,河南 洛阳 471000
    4.余姚市公安局,浙江 余姚 315400
  • 收稿日期:2023-07-19
  • 通讯作者: 李凡
  • 作者简介:葛静晨(1999—),女,硕士研究生,主要从事法医病理学研究;E-mail:1273858869@qq.com

The Application Value of MSCT Image Post-Processing Techniques in the Identification of Rib Fracture Malunion

Jing-chen GE1(), Min SHANG2, Ming-yang YAO3, Ming-fei WEI1, Jun-zhan SHI1, Ze-wei YAO1,4, Jia-yin SHI2, Fan LI1()   

  1. 1.School of Basic Medicine and Forensic Medicine, Henan University of Science and Technology, Luoyang 471023, Henan Province, China
    2.Department of Radiology, Zhoushan Branch of Luoyang Central Hospital Affiliated to Zhengzhou University, Luoyang 471003, Henan Province, China
    3.Henan Jinjian Judicial Appraisal Center, Luoyang 471000, Henan Province, China
    4.Yuyao Public Security bureau, Yuyao 315400, Zhejiang Province, China
  • Received:2023-07-19
  • Contact: Fan LI

摘要:

目的 比较容积再现(volume rendering,VR)、多层面重组(multi-plane reconstruction,MPR)和曲面重组(curved planar reformation,CPR)3种图像后处理技术在肋骨骨折畸形愈合认定中的应用价值。 方法 记录75例患者肋骨骨折畸形愈合的类型及数量,比较VR、MPR、CPR对肋骨骨折畸形愈合诊断的灵敏度、特异度、准确率和约登指数(Youden’s index,YI),绘制受试者操作特征曲线(receiver operating characteristic curve,ROC)并计算曲线下面积(area under curve,AUC),比较3种后处理技术对不同类型肋骨骨折畸形愈合的检出率。 结果 75例患者共有243处肋骨骨折畸形愈合。VR、MPR、CPR对肋骨骨折畸形愈合的诊断灵敏度分别为52.67%、79.84%、91.36%,特异度分别为99.58%、97.89%、99.15%,准确率分别为83.66%、91.76%、96.51%,YI分别为0.52、0.78、0.91,AUC分别为0.761、0.889、0.953。与VR相比,MPR在断端错合1/3以上、断端重叠、断端成角、骨桥的检出数量上差异有统计学意义(P<0.05);与VR相比,CPR在肋骨骨折畸形愈合的各分型的检出数量上差异有统计学意义(P<0.05);与MPR相比,CPR在断端错合1/3以上、断端分离、骨桥的检出数量上差异有统计学意义(P<0.05)。 结论 3种图像后处理技术对肋骨骨折畸形愈合的认定均具有重要意义,尤其是CPR对肋骨骨折畸形愈合的诊断效能高,可作为肋骨骨折畸形愈合法医临床鉴定的主要后处理技术。

关键词: 法医学, 肋骨骨折畸形愈合, 容积再现, 多平面重组, 曲面重组

Abstract:

Objective To compare the application value of three image post-processing techniques volume rendering (VR), multi-plane reconstruction (MPR) and curved planar reformation (CPR) in the identification of rib fracture malunion, and to provide a reliable imaging method for forensic identification of rib fracture malunion. Methods The types and numbers of rib fracture malunion in 75 patients were recorded, and the sensitivity, specificity, accuracy and Youden index (YI) of VR, MPR and CPR in the diagnosis of rib fracture malunion were compared. Receiver operating characteristic curve (ROC) curve was drawn and area under curve (AUC) was calculated, and the detection rates of different types of rib fracture malunion were compared by three post-processing techniques. Results A total of 243 rib fractures were malunion in 75 patients. The diagnostic sensitivity of VR, MPR and CPR for rib fracture malunion was 52.67%,79.84% and 91.36%, the specificity was 99.58%,97.89% and 99.15%, and the accuracy was 83.66%,91.76% and 96.51%, respectively. The YI was 0.52,0.78 and 0.91, respectively. AUC was 0.761,0.889 and 0.953, respectively. Compared with VR, there were statistically significant differences in the number of broken rib end misalignment over 1/3, broken rib end overlap, broken rib end angulation and intercostal bridge detected in MPR (P<0.05). Compared with VR, there was a statistically significant difference in the number of different types of rib fracture malunion detected by CPR (P<0.05). Compared with MPR, there were statistically significant differences in the number of broken rib end misalignment over 1/3, broken rib end separation and intercostal bridge detected in CPR (P<0.05). Conclusion The three image post-processing techniques are of great significance for the identification of rib fracture malunion, especially CPR is highly effective in the diagnosis of rib fracture malunion, and can be used as the main post-processing technique for forensic clinical identification of rib fracture malunion.

Key words: forensic medicine, rib fracture malunion, volume rendering, multi-plane reconstruction, curved planar reformation

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