MRI灰度翻转图像对长骨病变骨皮质异常情况的评估

Evaluation of MRI grayscale flip image in the cortical abnormalities in patients with long bone lesions

目的通过与X线平片及电子计算机断层扫描(computed tomography,CT)图像比较,探讨MRI灰度翻转图像对长骨病变骨皮质异常情况的诊断价值。材料与方法回顾2015至2019年病理证实的长骨病变患者共100例,其中骨肿瘤患者30例,外伤患者60例,骨感染性病变10例,所有病例均已行DR、CT及MRI平扫检查。选择MRIT1WI图像右键鼠标并点击相应工具选项,瞬间获得灰度翻转图像。统计MR灰度翻转图像对于骨皮质异常(中断、增厚、变薄)的检出情况,并与X线平片及CT进行对比,使用χ^2检验分析进行统计学分析。结果MRI灰度翻转图像检出骨皮质异常79例(骨皮质中断70例,骨皮质增厚5例,骨皮质变薄4例),检出率为79%;X线平片检出84例(骨皮质中断73例,骨皮质增厚6例,骨皮质变薄5例),检出率为84%;CT图像检出骨皮质异常100例(骨皮质中断89例,骨皮质增厚6例,骨皮质变薄5例),检出率为100%。对于骨皮质异常情况的检出,MRI灰度翻转图像与平片之间差异无统计学意义,与CT图像之间差异具有统计学意义。结论MRI灰度翻转图像评估长骨病变骨皮质异常情况是可行的,在没有或无法得到X线平片或CT图像的情况下(如孕妇),可以用MRI翻转图像观察骨皮质情况。

Objective:To discuss the diagnostic value of MRI grayscale flip image in the cortical abnormalities in longbone lesions compared with conventional X-ray and CT images.Materials and Methods:A retrospective study of 100 patients with long bone lesions confirmed by surgical pathology from 2015 to 2019,there were 30 cases of bone tumor,60 cases of trauma and 10 cases of bone infection.All patients were examined by DR,CT and MRI.Select MRI-T1WI image and right-click the mouse and click the corresponding tool options to obtain the grayscale flipped image instantly.The detection of cortical bone abnormalities(interruption,thickening,thinning)was statistically analyzed,compared with X-ray and CT,statistical analysis was performed using χ^2 test analysis.Results:MRI gray scale flip image detected 79 cases of cortical abnormalities,with a detection rate of 79%,and 84 cases of X-ray detection,with a detection rate of 84%,CT images detected 100 cases of cortical abnormalities,with a detection rate of 100%.There was no statistical difference between MRI grayscale flip image and X-ray image in displaying of cortical abnormalities.MRI flip images and CT images have statistically significant differences in the detection of cortical abnormalities.Conclusions:MRI grayscale flip images are useful for assessing bone cortical abnormalities in long bone lesions,in the absence or inability to obtain plain X-ray or CT images(e.g.,pregnant women),MRI grayscale flip images can be used to observe the cortical bone.