en اپتیک پزشکی، میکروسکوپ نوری و بیوفوتونیک Medical Optics, Optical Microscope, Biophotonics پژوهشي Research <span style="font-size:11pt"><span new="" roman="" style="font-family:" times=""><span style="font-weight:bold">In this work we applied a Bessel beam (BB) to a layer of turbid medium. We applied the Monte Carlo simulation. This work emulates a tissue under surgery by a Bessel beam. Actually, the BB introduces less divergence. Thus it will be good for surgery. On the other part this is done by Monte Carlo simulation. Upon simulation we got family of curves to characterize absorption, reflection and scattering of this layer. Where we got numerical values of absorption, transmission and reflection of this layer. The curves are for layer thickness that varies along with varying scattering coefficient, absorption coefficient and anisotropy factor.</span></span></span> <h2></h2> Bessel Beam, Monte Carlo Simulation, Surgery, Turbid Media. 21 30 http://ijop.ir/browse.php?a_code=A-10-931-1&slc_lang=en&sid=1 Tarek Al-Saeed tarek1971@ieee.org 10031947532846004940 10031947532846004940 Yes Department Biomedical Engineering Department, Faculty of Engineering, University of Helwan, Helwan(11517), Cairo, Egypt