Title :
Thermically induced changes in optical properties of heart
Author :
Jacques, Steven L. ; Gaeeni, Margaret O.
Author_Institution :
Texas Univ., M.D. Anderson Cancer Center, Houston, TX, USA
Abstract :
Optical properties of ventricular myocardium (dog) were determined at two helium-neon laser wavelengths, 594 nm and 633 nm. The absorption coefficient and reduced scattering coefficient were deduced from integrating sphere measurements of total transmission and total reflectance. The changes caused by variable time exposure to various temperatures (water bath) were documented. The temperature dependence of the degree of coagulation achieved by heating, scored by the final stable optical properties, suggests that a heterogeneous population distribution of tissue structures is involved in coagulation
Keywords :
biothermics; cardiology; light absorption; light reflection; light scattering; light transmission; 594 nm; 633 nm; He-Ne laser wavelengths; absorption coefficient; degree of coagulation; dog; heart; heating; heterogeneous population distribution; integrating sphere measurements; optical properties; reduced scattering coefficient; temperature dependence; temperatures; tissue structures; total reflectance; total transmission; variable time exposure; ventricular myocardium; water bath; Biomedical optical imaging; Geometrical optics; Glass; Heart; Light scattering; Myocardium; Nonlinear optics; Optical scattering; Particle scattering; Reflectivity;
Conference_Titel :
Engineering in Medicine and Biology Society, 1989. Images of the Twenty-First Century., Proceedings of the Annual International Conference of the IEEE Engineering in
Conference_Location :
Seattle, WA
DOI :
10.1109/IEMBS.1989.96158
