Laser Physics: Beam Penetration in Tissue

Laser-tissue interaction principles: beam penetration in tissues

Energy for Health, Volume 6

G. Romano, F. Fusi

Medical Physics Section, Department of Clinical Physiopathology, University of Florence, Florence, Italy

Study Objective:

This paper analyzed the principles between laser beam and tissue interaction, focusing on the principal of light scattering.

Conclusion:

Light scattering in tissue is due to inhomogenities in the cell such as cell membranes or intracellular structures. These structures, as well as tissue thickness and density, will affect how deep the laser can effectively penetrate (referred to as penetration depth). Penetration depth is independent of laser intensity and independent of laser power, it is directly related to the laser wavelength.

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