Federici J F, Guzelsu N, Lim H C, Jannuzzi G, Findley T, Chaudhry H R, Ritter A B
Department of Physics, New Jersey Institute of Technology, Newark, New Jersey 07102, USA.
Appl Opt. 1999 Nov 1;38(31):6653-60. doi: 10.1364/ao.38.006653.
A novel, to our knowledge, sensor for measuring the stretch in soft tissues such as skin is described. The technique, which is a modification of two-dimensional polarization imaging, uses changes in the reflectivity of polarized light as a monitor of skin stretch. Measurements show that the reflectivity increases with stretch. Measurements were made on guinea pig skin and on nonbiological materials. The changes in reflectivity result from the changes that take place in the interface roughness between skin or material layers and the consequential changes in the diffuse reflective characteristics of the skin. Conceptually, as the roughness of an interface decreases, a smoother reflecting interface is produced, resulting in a commensurate increase in specular reflection. A simple roughness model correctly predicts the main experimental results. Results can be extended easily to real-time stretch analysis of large tissue areas that would be applicable for predicting stresses in skin during and after the surgical closure of wounds.
据我们所知，本文描述了一种用于测量皮肤等软组织拉伸的新型传感器。该技术是对二维偏振成像的改进，利用偏振光反射率的变化作为皮肤拉伸的监测指标。测量结果表明，反射率随拉伸而增加。在豚鼠皮肤和非生物材料上进行了测量。反射率的变化源于皮肤或材料层之间界面粗糙度的变化以及皮肤漫反射特性的相应变化。从概念上讲，随着界面粗糙度的降低，会产生更光滑的反射界面，从而导致镜面反射相应增加。一个简单的粗糙度模型能够正确预测主要实验结果。这些结果可以很容易地扩展到对大面积组织的实时拉伸分析，这将适用于预测伤口手术缝合期间及之后皮肤中的应力。
