Analysis of thermal damage in vocal cords for the prevention of collateral laser treatment effects

Félix Fanjul Vélez; José Luis Arce-Diego; Ángela del Barrio Fernández; Alfonso Borragán Torre

doi:10.1117/12.741077

1 May 2007 Analysis of thermal damage in vocal cords for the prevention of collateral laser treatment effects

Félix Fanjul Vélez, José Luis Arce-Diego, Ángela del Barrio Fernández, Alfonso Borragán Torre

Proceedings Volume 6535, Saratov Fall Meeting 2006: Optical Technologies in Biophysics and Medicine VIII; 653523 (2007) https://doi.org/10.1117/12.741077
Event: Saratov Fall Meeting 2006, 2006, Saratov, Russian Federation

Abstract

The importance of vocal cords for the interaction with the world around is obviously known. Vocal cords disorders can be divided mainly into three categories: difficulty of movement of one or both vocal folds, lesion formation on them, and difficulty or lack of mucosal wave movement. In this last case, a laser heating treatment can be useful in order to improve tissue vibration. However, thermal damage should be considered to adjust laser parameters and so to prevent irreversible harmful effects to the patient. in this work, an analysis of thermal damage in vocal folds is proposed. Firstly thermo-optical laser-tissue interaction is studied, by means of a RTT (Radiation Transfer Theory) model solved with a Monte Carlo approach for the optical propagation of radiation, and a bio-heat equation, with a finite difference numerical method based solution, taking into account blood perfusion and boundary effects, for the thermal distribution. The spatial-temporal temperature distributions are obtained for two widely used lasers, Nd:YAG (1064 nm) and KTP (532 nm). From these data, an Arrhenius thermal damage analysis allows a prediction of possible laser treatment harmful effects on vocal cords that could cause scar formation or tissue burn. Different source powers and exposition times are considered, in such a way that an approximation of adequate wavelength, power and duration is achieved, in order to implement an efficient and safe laser treatment.

Citation Download Citation

Félix Fanjul Vélez, José Luis Arce-Diego, Ángela del Barrio Fernández, and Alfonso Borragán Torre "Analysis of thermal damage in vocal cords for the prevention of collateral laser treatment effects", Proc. SPIE 6535, Saratov Fall Meeting 2006: Optical Technologies in Biophysics and Medicine VIII, 653523 (1 May 2007); https://doi.org/10.1117/12.741077

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available