Tissue deformation analysis using a laser based digital image correlation technique.

Tissue deformation analysis using a laser based digital image correlation technique.
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使用基于激光的数字图像相关技术进行组织变形分析。

DOI:
10.1016/j.jmbbm.2011.10.007
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发表时间:
2012
影响因子:
3.9
通讯作者:
Kerl J
Kerl J
中科院分区:
工程技术2区
文献类型:
--
作者:
Kerl J

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提出了一种基于激光的高空间分辨率透明生物医用材料组织变形的平面时间分辨测量技术。该方法是基于监测先前嵌入到半透明样品中的微米颗粒的位移,因为它受到某种形式的外部负载的变形。这些粒子被薄激光片照射在组织材料内部的一个平面上,这种图案被数码相机连续记录下来。在不需要任何原位测量硬件的情况下,图像分析可以在测量平面上产生局部和时间分辨的样品变形。通过对明胶的体外试验,证明了该方法在将针头插入软材料样品时测定组织变形和材料应变的适用性。
A laser based technique for planar time-resolved measurements of tissue deformation in transparent biomedical materials with high spatial resolution is developed. The approach is based on monitoring the displacement of micrometer particles previously embedded into a semi-transparent sample as it is deformed by some form of external loading. The particles are illuminated in a plane inside the tissue material by a thin laser light sheet, and the pattern is continuously recorded by a digital camera. Image analysis yields the locally and temporally resolved sample deformation in the measurement plane without the need for any in situ measurement hardware. The applicability of the method for determination of tissue deformation and material strain during the insertion of a needle probe into a soft material sample is demonstrated by means of an in vitro trial on gelatin.
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