摘要
目的 观察基于T2WI灰度级直方图分析鉴别脑膜瘤质地的价值.方法 回顾性分析109例脑膜瘤患者,根据肿瘤质地分为质硬组(n=71)与质软组(n=38).于轴位T2WI显示肿瘤最大层面勾画ROI,提取灰度级并进行直方图分析;比较组间各直方图参数数据,绘制受试者工作特征曲线,计算曲线下面积(AUC),比较各参数鉴别质软与质硬脑膜瘤的效能.结果 质软组脑膜瘤T2WI灰度级P1、P10、P50、P90、P99及平均值均高于质硬组(P均＜0.05),而组间变异度、偏度及峰度差异均无统计学意义(P均＞0.05).T2WI灰度级P1、P10、P50、P90、P99及平均值鉴别质软与质硬脑膜瘤的效能均较高(AUC为0.774～0.833)而差异均无统计学意义(P均＞0.05).结论 基于T2WI灰度级直方图分析所获P,、P10、P50、P90、P99及平均值鉴别质软与质硬脑膜瘤效能均较好.
Abstract
Objective To observe the value of grey-level histogram analysis based on T2WI for differentiating consistency of meningioma.Methods Data of 109 patients with meningioma were retrospectively analyzed.The patients were divided into hard group(n=71)and soft group(n=38)according to the consistency of tumors.Tumor ROI was outlined on axial T2WI showing the largest tumor section,gray levels were extracted and histogram analysis was performed.The value of each histogram parameter were compared between groups.Then receiver operating characteristic curve was drawn,and the area under the curve(AUC)was calculated to evaluate the efficiency for differentiating soft and hard meningioma.Results P1,P10,P50,P90,P99 and the mean grey levels on T2WI in soft group were all higher than those in hard group(all P＜0.05),while the variance,the kurtosis and the skewness were not significantly different between groups(all P＞0.05).The differentiating efficiency of P1,P10,P50,P90,P99 and the mean grey levels on T2WI were all fine,with AUC of 0.774 to 0.833,and no significant difference was found(all P＞0.05).Conclusion Parameters of grey-level histogram analysis such as P1,P10,Ps0,P90,P99 and the mean values based on T2WI were all valuable for differentiating soft and hard meningioma.
万方数据