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Optical clearing mechanisms characterization in muscle

Journal of Innovative Optical Health Sciences 2016年第5期9卷 82-100页

作者： Luís Oliveira M.Inês Carvalho Elisabete Nogueira Valery V.Tuchin Physics Department–Polytechnic Institute of Porto School of Engineering Rua Dr.Antonio Bernardino de Almeida 4314200-072 PortoPortugal FEUP–University of Porto Rua Dr.Roberto Frias 4200-465 PortoPortugal CIETI–Centre of Innovation in Engineering and Industrial Technology ISEP Rua Dr.Antonio Bernardino de Almeida4314200-072 PortoPortugal DEEC/FEUP and INESC TEC University of Porto Rua Dr.Roberto Frias 4200-465 PortoPortugal Research-Education Institute of Optics and Biophotonics Saratov National Research State University 83 Astrakhanskaya street Saratov 410012Russia Laboratory of Laser Diagnostics of Technical and Living Systems Institute of Precision Mechanics and Control RAS 24 Rabochaya street Saratov 410028Russia Interdisciplinary Laboratory of Biophotonics Tomsk National Research State University 36 Lenin's avenue Tomsk 634050Russia

Optical immersion clearing is a technique that has been widely studied for more than two decades and that is used to originate a temporary transparency effect in biological *** applied in cooperation with clinical methods it provides optimization of diagnosis and treatment *** technique turns biological tissues more transparent through two main mechanisms-tissue dehydration and refractive index(RI)matching between tissue *** matching is obtained by partial replacement of interstit ial water by a biocompat ible agent that presents higher RI and it can be completely rever sible by natural rehydration in vrivo or by assisted rehydration in ex vivo *** data to characterize and discriminate between the two mechanisms and to find new ones are *** a simple method,based on collimated transmittance and thickness measurements made from muscle samples under treatment,we have estimated the diffusion properties of glucose,ethylene glycol(EG)and water that were used to perform such char acterization and *** these properties with data from literature that characterize their diffusion in water we have observed that musde cell membrane permeability limits agent and water diffusion in the *** same experi-mental data has allowed to calculate the optical dearing(OC)eficiency and make an inter-pretation of the internal changes that occurred in muscle during the *** same methodology can now be used to perform similar studies with other agents and in other tissues in order to solve engineering problems at design of inexpensive and robust technologies for a *** improvement of optical tomogr aphic techmiques with better contrast and in depth imaging.

关键词： Collimated transmittance agent diffusivity tissue dehydration thickness variation refractive index matching glucose ethylene glycol

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