一引言 非侵入测量是在探头不插入被测样品情况下,测定样品内部结构的声学参量及几何尺寸的测量方法。这种方法不仅在工程上有应用背景(如固体材料的无损评估,层状结构的超声检测等),在诊断超声中,对活体组织声学参量的测定也必须采用一些适当的非侵入测量方法,才能使活体组织 I. INTRODUCTION Non-intrusive measurement is a method of measuring the acoustic parameters and geometrical dimensions of the internal structure of a sample without the probe being inserted into the sample under test. This method not only has application background (such as non-destructive evaluation of solid materials, ultrasonic testing of layered structures, etc.), but also some suitable non-invasive measurement methods for the determination of acoustic parameters of living tissue in diagnostic ultrasound. To make living tissue