Accuracy and reliability testing of a portable soft tissue indentor.
Accuracy and reliability testing of a portable soft tissue indentor.
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便携式软组织压头的准确性和可靠性测试。
DOI：
10.1109/7333.928583
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发表时间：
2001
期刊：
影响因子：
--
通讯作者：
Mueller,MJ
中科院分区：
文献类型：
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作者：
Klaesner,JW;Commean,PK;Hastings,MK;Zou,D;Mueller,MJ
我们设计、制造并测试了一种便携式压痕装置，使我们能够在临床或研究环境中确定软组织上的力/位移(F/D)测量。压痕系统由安装在三维测量装置(Metrecm)上的称重传感器组成。称重传感器和Metrecm的输出由笔记本电脑上运行的软件记录和分析。Metrecm的位移校准平均误差为0.005 mm[标准差(SD)=0.062]。测力传感器的测力校准平均误差为0.022 N(SD=0.049)，线性度为1.0062(R/SUP 2/=0.9998)。两名不同的研究人员在六个不同的人体软组织上测试了这种压痕装置。这些结果的内部信度和内部信度为0.99[组间相关(ICC)]，表明这些结果可由多名研究人员重复性。两种材料压痕测试的F/D测量结果与Instron设备测得的值相当(5.34对5.52 N/mm和0.98对1.04 N/mm)。该装置被用于测量一名受试者足底表面的软组织特征。这些数据被用来利用郑等人推导的方程来计算组织的有效杨氏模数。[1999]并根据所使用的F/D曲线的部分显示了很大范围的值。所有结果表明，来自这种便携式压痕装置的数据足够可靠、准确和灵敏，足以识别人体组织的机械特性。
We have designed, built, and tested a portable indentor device that allows us to determine force/displacement (F/D) measurements on soft tissue in a clinical or research setting. The indentor system consists of a load cell mounted on a three-dimensional measurement device (Metrecom). The output of the load cell and the Metrecom are recorded and analyzed by software running on a notebook computer. The displacement calibration of the Metrecom gave an average error=0.005 mm [standard deviation (SD)=0.062)]. The force calibration of the load cell resulted in an average error=0.022 N (SD=0.049) and a linearity of 1.0062(R/sup 2/=0.9998). The indentor device was tested on six different human soft tissues by two different investigators. The interreliabilities and intrareliabilities were 0.99 [interclass correlation (ICC)] indicating that the results were repeatable by more than one investigator. F/D measurements from indentor testing on two materials were comparable to values measured using an Instron device (5.34 versus, 5.52 N/mm, and 0.98 versus 1.04 N/mm). The device was used to measure the soft tissue characteristics on the plantar surface of the foot of one subject. These data were used to calculate the effective Young's modulus for the tissue using equations derived by Zheng et al. [1999] and indicated a wide range of values dependent upon the portion of the F/D curve used. All results indicate data from this portable indentor device are reliable, accurate, and sensitive enough to identify mechanical properties of human tissues.