计算机科学 ›› 2018, Vol. 45 ›› Issue (5): 260-265.doi: 10.11896/j.issn.1002-137X.2018.05.045
所属专题： 医学图像
黄志杰,王伊侬,王青
HUANG Zhi-jie, WANG Yi-nong and WANG Qing
摘要： 为了获取患者心血管内斑块特征的准确信息,并辅助临床医生对动脉粥样硬化区域进行判断和识别,文中进行了基于血管内超声(IVUS)图像的心血管粥样硬化斑块组织自动定征的研究。本研究收集了10个心血管疾病患者的IVUS图像,共207块斑块样本。首先,确定滑动邻域块的尺寸,令其中心像素遍历斑块区域,遍历过程中计算每个滑动邻域块的灰度均值和熵,并沿4个方向运用灰度共生矩阵法求出共生矩阵的10个局部特征；然后,对IVUS图像进行Gabor滤波和局部二值模式(LBP)处理,获得了更多的图像纹理特征；最后,通过线性分类器Liblinear、随机森林分类器(Random Forests)和调和最小值-广义学习向量量化分类器(H2M-GLVQ)对降维后的特征数据进行分类判决。将医生人工标记的结果作为金标准,自动定征的实验结果表明,随机森林和H2M-GLVQ分类器总体上对斑块组织的识别准确率均达到80%以上,其中随机森林分类器识别纤维化、脂质和钙化样本斑块的平均识别准确率分别为89.04%,80.23%和73.77%。
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