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心肌厚度的测定在M型超声心动图诊断中占有重要地位。准确地测定左心室后壁厚度是某些心脏病诊断的前提,如高血压病心脏损害,冠心病、心肌病等。左室后壁心内膜的回声往往较弱故需开大远程增益,但有时心外膜、心包的辉度不能相应地增加,相反却可能减弱,以至无法辨认心肌层、心外膜和心包,给诊断带来极大困难。国外有些仪器设有跳跃式增益调节装置借以明确心外膜的位置。但国内仪器均无这一
Myocardial thickness measurement in the M-type echocardiography diagnosis occupies an important position. Accurate determination of left ventricular posterior wall thickness is the premise of some heart disease diagnosis, such as hypertension, heart damage, coronary heart disease, cardiomyopathy and so on. The left ventricular posterior wall endomyocardial echoes tend to be weak to open large gain, but sometimes the epicardial, pericardial brightness can not be increased accordingly, but may be weakened, and even unable to identify the myocardium, epicardium and pericardium , Bring great difficulty to the diagnosis. Some foreign instruments have leap gain adjustment device in order to clarify the location of the epicardium. However, none of domestic instruments