Avtor/Urednik		Pavlin, Mojca; Jarm, Tomaž; Poberaj, Igor; Serša, Gregor; Miklavčič, Damijan
Naslov		Model transporta svetlobe v biološkem tkivu
Prevedeni naslov		Modeling of light transport in biological tissue
Tip		članek
Vir		In: Zajc B, editor. Zbornik 7. elektrotehniške in računalniške konference ERK'98. Zvezek B. Računalništvo in informatika, umetna inteligenca, robotika, razpoznavanje vzorcev, biomedicinska tehnika, močnostna elektrotehnika, didaktika, študentski članki; 1998 sep 24-26; Portorož. Ljubljana: Slovenska sekcija IEEE,
Leto izdaje		1998
Obseg		str. 399-402
Jezik		slo
Abstrakt		Propagation of light in a biological medium can be described by means of transport equation or approximate diffusion theory, provided that certain optical properties of the medium are known. For complex geometries and multilayer structures computer simulation has to be used for theoretical analysis of light transport. A three-dimensional Monte-Carlo model of light propagation in tissue has been applied for the purpose of better understanding of the results of near-infrared spectroscopy (NIRS) measurements. Values of optical parameters used in the model were adopted from literature, but for further use they sould be determined experimentally. Initial evaluation of the model was performed using the results obtained from measurement son simple tissue geometrise. The model was futher applied for analysis of light distribution in small experimental tumors. Results indicate that NIRS measurements obtained from such objects are valid as the model shows that most of the NIRS signal originates from the tumor tissue itself and is not substantially contaminated by the signal from surrounding tissues. It has also been conclude that one should very carefully take into account all parameters such as finite size of laser beam and numerical aperture of light guides used in order to obtain reliable simulations. Possible effects of a multilayer structure of tissues and reflections on the boundaries between tissue layers should also be analyzed in the future work.
Deskriptorji		SPECTROSCOPY, NEAR-INFRARED MONTE CARLO METHOD LIGHT PHOTIC STIMULATION