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944 IEEE JOURNAL ON SELECTED TOPICS IN QUANTUM ELECTRONICS, VOL. 7, NO. 6, NOVEMBER/DECEMBER 2001 Modeling the Thermal Response of Porcine Cartilage
 

Summary: 944 IEEE JOURNAL ON SELECTED TOPICS IN QUANTUM ELECTRONICS, VOL. 7, NO. 6, NOVEMBER/DECEMBER 2001
Modeling the Thermal Response of Porcine Cartilage
to Laser Irradiation
Sergio H. Díaz, Guillermo Aguilar, Enrique J. Lavernia, and Brian J. F. Wong
Abstract--During laser irradiation of biological tissue, a
number of physical processes take place that determine tempera-
ture elevation and thermal damage rates. Some of those important
to laser­tissue interaction are: 1) propagation of light in scattering
media; 2) transformation of laser light into photochemical,
acoustic, or thermal energy; 3) tissue­tissue and tissue­environ-
ment heat and mass transfer; 4) and the occurrence of low-energy
phase transformations responsible for structural alterations. The
aim of this study was to formulate a finite-element model (FEM)
able to predict the temperature distribution in a slab of porcine
nasal cartilage during laser irradiation. The FEM incorporates
heat diffusion, light propagation in tissue, and water evaporation
from the surfaces of the slab. Numerical results were compared
to experimental temperature distributions where surface and
internal temperatures were measured while heating cartilage
using a pulsed Nd : YAG laser ( = 1 32 m). Rectangular

  

Source: Aguilar, Guillermo - Department of Mechanical Engineering, University of California at Riverside

 

Collections: Engineering