Title :
Light-guiding effect in a two-fluid model of laser angioplasty
Author :
Ilegbusi, Olusegun J. ; Nosovitsky, Victor A. ; DiMarzio, Charles A.
Author_Institution :
Dept. of Mech., Ind. & Manuf. Eng., Northeastern Univ., Boston, MA, USA
fDate :
7/1/1997 12:00:00 AM
Abstract :
Mixing and optical characteristics of blood and optical fluid, utilized in laser angioplasty, are investigated with a two-fluid model. Transport equations are solved for the zone-averaged variables of each fluid with allowance for momentum transport at the interface. The predicted volume fractions of the fluids are used as weight functions to calculate the mixture refractive index. A set of light rays are traced through the fluids to the plaque, utilizing the mixture refractive index. The results indicate significant effect of flow characteristics on the focusing of the rays.
Keywords :
laser applications in medicine; light propagation; physiological models; refractive index; surgery; blood optical characteristics; laser angioplasty; laser surgery; light rays tracing; light-guiding effect; mixture refractive index; momentum transport; optical fluid; predicted volume fractions; rays focusing; transport equations; two-fluid model; zone-averaged variables; Angioplasty; Biomedical optical imaging; Blood; Catheters; Laser modes; Optical distortion; Optical mixing; Optical refraction; Optical variables control; Refractive index; Algorithms; Angioplasty, Laser; Blood; Blood Flow Velocity; Computer Simulation; Contrast Media; Humans; Ioxaglic Acid; Models, Theoretical; Refractometry;
Journal_Title :
Biomedical Engineering, IEEE Transactions on
