大动脉中的辐射传输。
Radiative transport in large arteries.
作者信息
Ruh Dominic, Subramanian Sivaraman, Theodor Michael, Zappe Hans, Seifert Andreas
机构信息
Gisela and Erwin Sick Chair of Micro-optics, Department of Microsystems Engineering, University of Freiburg, Freiburg, Germany.
出版信息
Biomed Opt Express. 2013 Dec 2;5(1):54-68. doi: 10.1364/BOE.5.000054.
Abstract
A refined model for the photon energy distribution in a living artery is established by solving the radiative transfer equation in a cylindrical geometry, using the Monte Carlo method. Combining this model with the most recent experimental values for the optical properties of flowing blood and the biomechanics of a blood-filled artery subject to a pulsatile pressure, we find that the optical intensity transmitted through large arteries decreases linearly with increasing arterial distension. This finding provides a solid theoretical foundation for measuring photoplethysmograms.
摘要
通过使用蒙特卡罗方法求解圆柱几何结构中的辐射传输方程，建立了一个用于活体内动脉光子能量分布的精确模型。将该模型与流动血液的光学特性以及承受脉动压力的充血动脉生物力学的最新实验值相结合，我们发现通过大动脉传输的光强随动脉扩张的增加而线性下降。这一发现为测量光电容积脉搏波图提供了坚实的理论基础。
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