介入超声印压系统检测超声仿体硬度的实验研究

Experimental study on assessment of ultrasound phantoms stiffness by intervention ultrasound indention system

目的评价介入超声印压系统检测不同硬度超声仿体的可行性和准确性。方法制作3组不同硬度的超声仿体,单轴压缩检测其杨氏模量作为标准,同时应用介入超声印压系统检测其仿体的硬度。结果两种方法检测的第1组仿体硬度值分别为（21.8±5.1）kPa,（45.5±5.7）kPa;第2组仿体硬度值分别为（44.8±7.1）kPa,（86.1±15.0）kPa;第3组仿体硬度值分别为（85.2±7.7）kPa,（117.9±10.9）kPa。两种方法检测硬度值的相关系数r=0.94。结论介入超声印压系统能够检测不同硬度的超声仿体,其硬度值与杨氏模量具有强相关,该仪器具有检测活体心肌和深部组织硬度变化的潜力。

Objective To explore the feasibility and accurate of interventional ultrasound indention system detecting phantoms stiffness.Methods The three different stiffness phantoms were made and their Young＇s module were measured by uniaxial ultrasound compression system.The ratio of the indentation pressure to the phantoms relative deformation was obtained from intervention ultrasound indention.ResultsThese phantoms Young＇s module measured by uniaxial ultrasound compression system were（21.8±5.1）kPa,（44.8±7.1）kPa,（85.2±7.7）kPa,respectively and their stiffness were（45.5±5.7）kPa,（86.1±15.0）kPa,（117.9±10.9）kPa,respectively by intervention utrasound indention system.The stiffness was well correlated with the Young＇s modulus（r=0.94）.Conclusions The intervention ultrasound indention system may detect different stiffness phantoms and it may be also applied for the stiffness assessment of myocardium and deep tissue in vivo.