Title :
Laser tissue interaction modeling for treatment planning of port-wine stain
Author :
Shafirstein, G. ; Baumle, W. ; Lapido, M. ; Ferguson, S. ; North, P.E. ; Waner, M.
Author_Institution :
Center for Vascular Anomalies, Arkansas Children´´s Hospital, AR, USA
Abstract :
Finite element method is used to solve the diffusion equations of light and heat simultaneously, to calculate the temperature field in laser tissue interaction. The model suggests that a wavelength of 585 nm and continuous pulse of 0.45 ms with energy density of at least 6 Jcm-2 are recommended for effective flashlamp pulsed dye laser treatment of port-wine stains. The model predicts that vessel smaller than 20 μm will be spared and vessels larger than 200 μm in diameter will be partially coagulated. These results agreed with previously published pathological examination.
Keywords :
bio-optics; blood vessels; coagulation; diffusion; finite element analysis; high-speed optical techniques; hyperthermia; laser applications in medicine; photodynamic therapy; physiological models; skin; 0.45 ms; 585 nm; diffusion equations; finite element method; flashlamp pulsed dye laser treatment; laser tissue interaction; pathological examination; port-wine stain; treatment planning; Blood; Dermis; Epidermis; Equations; Laser modes; Lesions; Mathematical model; Optical pulses; Skin; Temperature;
Conference_Titel :
Lasers and Electro-Optics Society, 2003. LEOS 2003. The 16th Annual Meeting of the IEEE
Print_ISBN :
0-7803-7888-1
DOI :
10.1109/LEOS.2003.1251764
