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Low Level Laser Therapy: laser radiation absorption in biological tissues

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Abstract

In this paper we report the results of an experimental study in which we have measured the transmitted laser radiation through dead biological tissues of various animals (chicken, adult and young bovine, pig) in order to evaluate the maximum thickness through which the power density could still produce a reparative cellular effect. In our experiments we have utilized a pulsed laser IRL1 ISO model (based on an infrared diode GaAs, λ=904 nm) produced by BIOMEDICA s.r.l. commonly used in Low Level Laser Therapy. Some of the laser characteristics have been accurately studied and reported in this paper. The transmission results suggest that even with tissue thicknesses of several centimeters the power density is still sufficient to produce a cell reparative effect.

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Acknowledgements

The authors wish to thank Profs. A. Congiu, G. Ruocco, F. Meddi, and G. Briganti, Drs. A. Messina, C. Calcagni, and P.K. O’Keeffe for their helpful discussions, and the staff of BIOMEDICA s.r.l. for their technical support.

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Authors and Affiliations

  1. Dipartimento di Fisica, Università di Roma “La Sapienza”, 00185, Rome, Italy

    Paola Di Giacomo & Marco Dell’Ariccia

  2. CNR—IMIP, U.O.S. Potenza, 85050, Tito Scalo, PZ, Italy

    Stefano Orlando

  3. Dipartimento di Medicina Sperimentale e Patologia, Università di Roma “La Sapienza”, 00185, Rome, Italy

    Bruno Brandimarte

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  1. Paola Di Giacomo
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  2. Stefano Orlando
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  3. Marco Dell’Ariccia
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  4. Bruno Brandimarte
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Correspondence to Stefano Orlando.

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Di Giacomo, P., Orlando, S., Dell’Ariccia, M. et al. Low Level Laser Therapy: laser radiation absorption in biological tissues. Appl. Phys. A 112, 71–75 (2013). https://doi.org/10.1007/s00339-012-7204-z

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  • DOI: https://doi.org/10.1007/s00339-012-7204-z

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