Reflectance as an indirect measurement of the extent of laser-induced coagulation
Reflectance as an indirect measurement of the extent of laser-induced coagulation
复制标题
反射率作为激光诱导凝固程度的间接测量
DOI：
10.1109/10.55637
复制
发表时间：
1990
影响因子：
4.6
通讯作者：
A. Welch
中科院分区：
文献类型：
--
作者：
Y. Yang;M. Markow;H. Rylander;W. Weinberg;A. Welch
Two-dimensional reflectance images and surface thermal distributions were recorded during argon laser induced coagulation. During laser irradiation, coagulated egg yolk formed a white lesion. The whiteness, or reflectance caused by backscattering of light from the forming lesion, would be measured after a short delay from the onset of laser irradiation. In the experiments, which covered exposure times from 4.5 to 17.0 s, the reflectance increased rapidly once the surface temperature of the lesion reached approximately 90 degrees C. After this rapid rise, the reflectance began to taper off until no change in reflectance was recorded. There was a 0.98 correlation between lesion diameter measured from a two-dimensional reflectance image and the lesion diameter that was measured microscopically. There was a 0.92 correlation between reflectance at the center of the lesion and microscopically measured depth of coagulation at the same point. However, the correlation between microscopically measured coagulation depth and width was only 0.88.<<ETX>>
