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背向散射积分超声组织定征识别存活心肌的实验 被引量:26

Detection of viable myocardium by ultrasonic tissue characterization with integrated backscatter
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摘要 目的探讨背向散射积分检测技术识别存活心肌的敏感性和准确性。方法应用商品化的背向散射积分联机分析处理系统检测活体开胸犬重度缺血、晕厥和梗死心肌模型的标化背向散射积分(IBS)、标化背向散射积分周期变异(CVIB)及室壁增厚率。结果重度缺血心肌IBS明显增高,CVIB明显减低。再灌注后CVIB的恢复幅度高于室壁增厚率。晕厥心肌的IBS和CVIB基本正常,但室壁增厚率明显减低。梗死心肌的IBS明显增高,CVIB消失或呈反相,再灌注后无改善。结论背向散射积分超声组织定征能敏感反映不同程度缺血心肌的散射特性变化。 Objective\ To assess the utility of ultrasonic tissue characterization with integrated backscatter (IBS) on detection of viable myocardium. Methods\ Online analysis of IBS was carried with a commercially available system in severe ischemic, stunned and infarcted myocardium of anesthetized open chest dogs (severe ischemia n=8, stunned n=6, infarcted n=6). Results\ In severe ischemic myocardium, the calibrated IBS increased significantly, the calibrated CVIB decreased significantly, CVIB curve presented a lower amplitude. After reperfusion, the recovery of CVIB prior to wall thickening. The stunned myocardium showed normal IBS and CVIB, though wall thickening decreased significantly. The calibrated IBS of infarcted myocardium increased significantly, the calibrated CVIB decreased significantly, CVIB curve became straight or inverse phase. CVIB showed no recovery after reperfusion. Conclusions\ Online analysis of IBS can sensitively detect viable myocardium. This approach may provide a new noninvasive tool for assessment of myocardial viability and function.
出处 《中华超声影像学杂志》 CSCD 1999年第2期122-125,共4页 Chinese Journal of Ultrasonography
关键词 超声组织定征 背向散射积分 存活心肌 Ultrasonic tissue characterization\ \ Integrated backscatter\ \ Viable myocardium
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