1. Michael G. Sowa

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    1. Mentioned In 27 Articles

    2. Added soft tissue contrast using signal attenuation and the fractal dimension for optical coherence tomography images of porcine arterial tissue

      Added soft tissue contrast using signal attenuation and the fractal dimension for optical coherence tomography images of porcine arterial tissue
      Optical coherence tomography (OCT) images of left-descending coronary tissues harvested from three porcine specimens were acquired with a home-build swept-source OCT setup. Despite the fact that OCT is capable of acquiring high resolution circumferential images of vessels, many distinct histological features of a vessel have comparable optical properties leading to poor contrast in OCT images. Two classification methods were tested in this report for the purpose of enhancing contrast between ...
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    3. Feature Of The Week 3/21/10: An Update on Novel Non-Invasive Approaches for Periodontal Diagnosis

      Feature Of The Week 3/21/10: An Update on Novel Non-Invasive Approaches for Periodontal Diagnosis
      Feature Of The Week 3/21/10: Periodontitis is currently diagnosed almost entirely on the basis of its clinical manifestations: signs of gingival inflammation (e.g., redness and swelling), probing depth (PD), and level of periodontal attachment or amount of alveolar bone loss. In fact, alveolar bone and periodontal attachment loss represent the results of the destructive aspects of the host defense mechanisms responding to opportunistic infections by bacteria present ...
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    4. Characteristics of time-domain optical coherence tomography profiles generated from blood–saline mixtures

      Abstract. Time-domain optical coherence tomography (OCT) employing a 1300 nm broadband source is used to study flowing blood–saline mixtures with blood concentration ranging from 20% to 100%. The study emphasizes the characteristics of the recorded OCT signal and its connection with the properties of the corresponding fluids. There are three regions with distinct properties along the compounded OCT profiles showing the signal dependence on depth. The recorded OCT signal ...
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    5. In Vitro Assessment of Optical Properties of Blood by Applying the Extended Huygens-Fresnel Principle to Time-Domain Optical Coherence Tomography Signal at 1300 nm

      A direct method for the measurement of the optical attenuation coefficient and the scattering anisotropy parameter based on applying the extended Huygens-Fresnel principle to optical coherence tomography images of blood is demonstrated. The images are acquired with a low-power probing beam at the wavelength of 1300 nm. Values of 12.15 mm−1 and 0.95 are found for the total attenuation coefficient and the scattering anisotropy factor, respectively. Also ...
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    6. Early dental caries detection using a fibre-optic coupled polarization-resolved Raman spectroscopic system

      A new fibre-optic coupled polarization-resolved Raman spectroscopic system was developed for simultaneous collection of orthogonally polarized Raman spectra in a single measurement. An application of detecting incipient dental caries based on changes observed in Raman polarization anisotropy was ... [Opt. Express 16, 6274-6284 (2008)]
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    7. Propagation properties of 1300-nm light in blood-saline mixtures determined through optical coherence tomography

      Dan P. Popescu, Bernhard Schattka, Mark D. Hewko et al. Establishing when the amount of recorded multiple scattered signal becomes dominant is important for various clinical applications that require optical coherence tomography imaging through a turbid environment such as blood. The profiles of detected signals obtained by compounding coherence tomograp ... [Proc. SPIE Int. Soc. Opt. Eng. 6864, 686408 (2008)] published Fri Feb 15, 2008.
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  2. About Michael G. Sowa

    Michael G. Sowa

    Michael (Mike) G. Sowa is the Spectroscopy Group Leader at the National Research Council Canada.