摘要
目的 利用图像纹理分析法 ,对急性心肌梗死心肌超声图像的纹理特征进行定量描述。方法 11只犬行左冠状动脉前降支结扎术 ,建立急性心肌梗死模型。取胸骨旁左心长轴切面前间隔及乳头肌短轴切面前壁舒张末期声像图作为研究对象 ,采用计算机灰度共生矩阵法进行纹理分析 ,测量正常心肌与梗死心肌的 4种纹理参数 ,即二次角矩、对比度、熵和反差矩。结果 四种纹理参数在正常心肌与梗死心肌之间存在明显差异 (P <0 0 0 1)。左心长轴切面与乳头肌短轴切面正常心肌的四种纹理参数比较 ,仅显示参数熵存在显著差异 ,P值小于 0 0 5。左心长轴与乳头肌短轴梗死心肌四种纹理参数比较 ,二次角矩与反差矩存在显著差异 (P <0 0 5 )。结论 正常与梗死心肌超声图像纹理特征不同。不同的纹理参量对正常心肌结构与病变心肌在不同切面上的纹理差异敏感不同。计算机纹理分析法能对心肌超声图像纹理进行定量分析 ,可为评价病变心肌声学图像特征提供一种客观定量的分析方法。
Objective To quantitatively describe the texture features of myocardial image in the acute myocardiac infarction (AMI) using image texture analysis. Methods Anterior descending branch of left coronary artery was ligated to set up AMI model in 11 dogs. Image texture was analyzed using grey tone co-occurrence matrix method, and 4 kinds of texture parameters including angular second moment(ASM), contrast(CON), entropy(ENT), and inverse difference moment(IDM) in normal myocardium and infarct myocardium were observed. Results A significant difference in 4 kinds of texture parameters was found between pre- and post-infarct myocardium (P<0.001). Among 4 parameters, only ENT was significantly different in normal myocardium between the long axis view of the left ventricule and short axis view at the papillary muscle level (P<0.05), while ASM and IDM were significantly different in AMI between above the two views(P<0.05). Conclusion Ultrasonic image texture features were different between normal and infarct myocardium. Different texture parameter had different sensitivity to texture difference of different view between normal and impaired myocardium. Computer texture analysis could quantitatively characterize the echocardiographic texture, and provide a quantitive method for assessing the image feature of impaired myocardium.
出处
《中国医师杂志》
CAS
2005年第1期61-63,共3页
Journal of Chinese Physician
关键词
心肌梗死
纹理分析
超声心动图
犬
Texture analysis
Echocardiography
Myocardial infarction
