医用超声诊断仪所提供的数据是否准确可靠，以及对人体尤其是胎儿有无损害是一个易被忽视的问题。究其原因则是对计量检定医用超声诊断仪的重要性和必要性缺乏了解。 以医用超声诊断仪输出声强的强度为例，近年来，几乎每位孕妇都在孕期接受过一次以上的超声诊断。但怎样减少或 Medical ultrasound diagnostic data provided by the accuracy and reliability, as well as the human body, especially the fetus without damage is a neglected issue. The reason for this is the lack of understanding of the importance and necessity of metrological verification of medical ultrasound diagnostic apparatus. Take the intensity of the output sound intensity of a medical ultrasonic diagnostic apparatus as an example. In recent years, almost every pregnant woman has received more than one ultrasound diagnosis during pregnancy. But how to reduce or