光剂量测定法：脱水和热损伤对人体主动脉光学特性的影响。

Light dosimetry: effects of dehydration and thermal damage on the optical properties of the human aorta.

作者信息

Cilesiz I F, Welch A J

出版信息

Appl Opt. 1993 Feb 1;32(4):477-87. doi: 10.1364/AO.32.000477.

DOI:10.1364/AO.32.000477

PMID:20802715

Abstract

The influences of dehydration and thermal damage on in vitro optical properties of human aorta were studied. The absorption coefficient increased by 20-50%, especially in the visible range when at least 40% of total tissue weight was lost as a result of dehydration. The reduced scattering coefficient increased by 10-45% in the visible and 30% to over 150% in the near IR after the tissue samples were heated in a constant temperature water bath at 100 degrees C for 300 +/- 10 s. This study implies that dehydration and protein coagulation during photothermal treatment of tissue are important factors altering optical properties of tissue.

摘要

研究了脱水和热损伤对人主动脉体外光学特性的影响。吸收系数增加了20%-50%，尤其是在可见光范围内，当由于脱水导致总组织重量损失至少40%时。在100℃恒温水浴中加热组织样本300±10秒后，可见光范围内的约化散射系数增加了10%-45%，近红外范围内增加了30%至超过150%。该研究表明，组织光热处理过程中的脱水和蛋白质凝固是改变组织光学特性的重要因素。