当然，超声波很早就已用于医疗成像，其应用的依据是声波在密度更大的组织中传播速度更快。
Ultrasound has, of course, long been used in medical imaging. It relies on the fact that sound travels faster through denser tissues.
目的：探讨定量组织速度成像技术在评价梗死心肌局部收缩运动和精确性能。
AIM To investigate the precise function of quantitative tissue velocity imaging in evaluating the local contraction of infarcted myocardium.
目的：探讨定量组织速度成像技术在评价梗死心肌局部收缩运动和精确性能。
AIM To investigate the precise function of quantitative tissue velocity imaging in evaluating the local contraction of infarcted myocardium.
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