Open Access

ARTICLE

BIO-HEAT TRANSFER SIMULATION OF SQUARE AND CIRCULAR ARRAY OF RETINAL LASER IRRADIATION

Arunn Narasimhan^*, Kaushal Kumar Jha

Heat Transfer and Thermal Power Laboratory, Department of Mechanical Engineering, Indian Institute of Technology Madras, Chennai - 600036, India

* Corresponding Author: Email:

Frontiers in Heat and Mass Transfer 2011, 2(3), 1-8. https://doi.org/10.5098/hmt.v2.3.3005

Abstract

Pan Retinal photocoagulation (PRP), a retinal laser surgical process, is simulated using a three-dimensional bio-heat transfer numerical model. Spots of two different type of array, square array of 3 × 3 spots and a circular array of six spots surrounding a central spot, are sequentially irradiated. Pennes bio-heat transfer model is used as the governing equation. Finite volume method is applied to find the temperature distribution due to laser irradiation inside the human eye. Each spot is heated for 100 ms and subsequently cooled for 100 ms with an initial laser power of 0.2 W. Based on the outcome of temperature distribution, the laser is pulsated in subsequent simulations to reduce the average peak temperature of spots to minimize the temperature induced cell damage. A method to reduce the laser power to attain the peak temperature towards photocoagulation temperature (60 ℃) is also presented.

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