Tissue characterization with ballistic photons: counting scattering and/or absorption centres

• Autorzy: Corral F. , Strojnik M. , Paez G.

Identyfikatory

DOI

10.1515/oere-2015-0011

• Konferencja: Advanced Infrared Technology and Applications - AITA 2013 (12 ; 10-13.09.2013 ; Turin, Italy)
• Języki publikacji: EN

Abstrakty

EN

We describe a new method to separate ballistic from the scattered photons for optical tissue characterization. It is based on the hypothesis that the scattered photons acquire a phase delay. The photons passing through the sample without scattering or absorption preserve their coherence so they may participate in interference. We implement a Mach-Zehnder experimental setup where the ballistic photons pass through the sample with the delay caused uniquely by the sample indices of refraction. We incorporate a movable mirror on the piezoelectric actuator in the sample arm to detect the amplitude of the modulation term. We present the theory that predicts the path-integrated (or total) concentration of the scattering and absorption centres. The proposed technique may characterize samples with transmission attenuation of ballistic photons by a factor of 10^-14.

Słowa kluczowe

EN

ballistic photons; interferometry; single-pass; coherent transmission; scattering; absorption; tissue; tissue characterization; near infrared; therapeutic window

• Wydawca: Stowarzyszenie Elektryków Polskich ; Polska Akademia Nauk ; Wojskowa Akademia Techniczna im. Jarosława Dąbrowskiego
• Czasopismo: Opto-Electronics Review
• Rocznik: 2015
• Tom: Vol. 23, No. 1
• Strony: 44--52
• Opis fizyczny: Bibliogr. 32 poz. rys., wykr.

Twórcy

autor

Corral F.

• Centro de Investigaciones en Optica, Apdo. Postal 1-948, C. P. 37000, León, Guanajuato, México

autor

Strojnik M.

• Centro de Investigaciones en Optica, Apdo. Postal 1-948, C. P. 37000, León, Guanajuato, México

autor

Paez G.

• Centro de Investigaciones en Optica, Apdo. Postal 1-948, C. P. 37000, León, Guanajuato, México

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Uwagi

EN

The CONACYT, Mexican National Science Foundation, provided funding to perform this research.