Laser Physics: Beam Penetration in Tissue

“Laser-tissue interaction principles: beam penetration in tissues”

Energy for Health Volume 6

G. Romano, F. Fusi

Study Objective:

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

Laser Physics: Beam Penetration in Tissue | Absorption chart


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.

*Note: MLS Laser depth of penetration is 3-5cm

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