1. Articles from Stepan Baranov

    1-2 of 2
    1. Gas-Cell Referenced Swept Source Phase Sensitive Optical Coherence Tomography

      Gas-Cell Referenced Swept Source Phase Sensitive Optical Coherence Tomography
      Distinct reference and signal interferometers in combination with a gas-cell spectral reference are employed to increase sensitivity and environmental stability of a swept source phase-sensitive optical coherence tomography. A displacement sensitivity (DS) of 65 pm at 280- $muhbox{m}$ depth and DS degradation with depth of 0.0015 rad/mm is achieved. Differential DS of 234 pm in a 127-$muhbox{m}$ -thick scattering phantom is six-fold superior to previously reported values. DS degradation with a depth of 0.026 rad/mm is reported for tissue-like scattering phantoms. Measured depth-dependent DS suggests that digitization time jitter noise contributes to degradation ...
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    2. Depth resolved photothermal OCT detection of macrophages in tissue using nanorose

      Depth resolved photothermal OCT detection of macrophages in tissue using nanorose

      Application of photothermal Optical Coherence Tomography (OCT) to detect macrophages in ex vivo rabbit arteries which have engulfed nanoclusters of gold coated iron oxide (nanorose) is reported. Nanorose engulfed by macrophages associated with atherosclerotic lesions in rabbit arteries absorb incident laser (800nm) energy and cause optical pathlength (OP) variation which is measured using photothermal OCT. OP variation in polydimethyl siloxane tissue phantoms containing varying concentrations of nanorose match values predicted from nanoparticle and material properties. Measurement of OP variation in rabbit arteries in response to laser excitation provides an estimate of nanorose concentration in atherosclerotic lesions of 2.5x109 particles ...

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    1-2 of 2
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    1. (2 articles) University of Texas at Austin
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