【摘 要】
：
目的 探讨超声定量诊断大鼠肝纤维化的价值.方法 收集正常或肝纤维化大鼠共90只的标准化声像图,观测肝包膜厚度并提取声像图纹理的13个灰度共生矩阵参数(熵、对比、方差、均
【机 构】
：
上海交通大学附属新华医院超声中心,复旦大学附属华山医院超声医学科,复旦大学电子工程系
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目的 探讨超声定量诊断大鼠肝纤维化的价值.方法 收集正常或肝纤维化大鼠共90只的标准化声像图,观测肝包膜厚度并提取声像图纹理的13个灰度共生矩阵参数(熵、对比、方差、均值和、方差和、和熵、方差差、差熵及相关信息2递增、相关信息1、角二阶矩、相关及逆差矩)与肝纤维化病理学诊断结果比较,进行逐步判别分析建立判别大鼠肝纤维化程度的超声定量模型,用交互检验评价模型的效率.结果 肝包膜厚度及其他13个指标与肝纤维化病理学分期均具有相关性(r值依次为0.817、0.894、0.808、0.844、0.828、0.795、0.864、0.725、0.821、0.848、-0.743、-0.909、-0.438、-0.855,P值均＜0.05),14个指标在病理学分期间的差异均具有统计学意义(F值分别为43.12、60.55、50.70、43.65、45.68、23.63、56.60、21.48、46.19、24.66、39.52、75.74、15.37、63.98,P值均＜0.05).交互检验结果显示建立于超声定量指标基础上的判别模型对大鼠肝纤维化S0、S1、S2、S3和S4分期的准确率分别为83.3％、84.2％、70.0％、50.0％和88.2％,73.3％的大鼠能够被准确分期；对无纤维化组(S0),轻度纤维化组(S1),中重度纤维化组(S2及S3)和早期肝硬化组(S4)分组的准确率分别为91.7%、84.2％、69.0％和88.2％,78.9％的大鼠能够被准确分组.结论 超声检查结合声像图的纹理分析对定量诊断大鼠肝纤维化具有较高的准确性.
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