1. Risto A. Myllylä

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    1. Mentioned In 38 Articles

    2. Measurement of microfluidic flow velocity profile with two Doppler optical coherence tomography systems

      Janne Lauri, Meng Wang, Matti Kinnunen et al. Doppler Optical Coherence Tomography (DOCT) is a useful technique for flow measurements. Its potential applications include industrial suspension viscosity measurements and blood flow measurements. In this work, a flow velocity profile of 1% Intralipid was measured in a capillary with an inner diame ... [Proc. SPIE Int. Soc. Opt. Eng. 6863, 68630F (2008)] published Wed Feb 20, 2008.
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    3. Contribution of various scattering orders to OCT images of skin

      Simulated OCT images of skin were obtained implementing Monte Carlo simulations. The multilayer skin model used in simulations was based on the experimental OCT images obtained at the wavelength of 910 nm. The following skin layers were considered in the model: stratum corneum, epidermis prickle layer, epidermis basal layer, dermis with upper plexus, dermis, and dermis with lower plexus. The images were obtained both with and without speckle accounting. The ...
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    4. Optical coherence tomography of paper: Monte Carlo simulation for multilayer mode

      In present work the capabilities of an optical coherence tomography (OCT) setup to visualize paper structure are analyzed by means of Monte Carlo-simulation of the OCT images. The OCT setup at 910 nm was considered. Efficiency of several different optical clearing agents (OCA) for increasing the quality of the obtained images was studied. A multilayer non-planar edged paper model was developed for the characterization of a paper sample and simple ...
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    5. Optical method for liquid sorption measurements in paper (Thesis)

      Optical method for liquid sorption measurements in paper (Thesis)
      This thesis presents an effective optical method for measuring liquid sorption into paper. From the two tested methods, based on a streak-camera and optical coherence tomography (OCT), the last-mentioned proved very promising for investigating dynamical paper-liquid interactions as spatially and temporally dependent processes. The streak-camera measurements were performed to explore the relationship between paper properties and light migration in dry and refractive index matched paper in general. Based on streak-camera ...
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    6. Low Coherence Interferometry and Optical Coherence Tomography in Paper Measurements (Thesis)

      Low Coherence Interferometry and Optical Coherence Tomography in Paper Measurements (Thesis)
      This thesis describes the application of Low Coherence Interferometry (LCI) and Optical Coherence Tomography (OCT) in paper measurements. The developed measurement system is a combination of a profilometer and a tomographic imaging device, which makes the construction versatile and applicable in several paper measurement applications. The developed system was first used to measure the surface structure of paper. Different grades of paper were selected to provide maximum variation in surface ...
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    7. Comparison of optical coherence tomography, the pulsed photoacoustic technique, and the time-of-flight technique in glucose measurements in vitro (Thesis)

      Comparison of optical coherence tomography, the pulsed photoacoustic technique, and the time-of-flight technique in glucose measurements in vitro (Thesis)
      The development of a non-invasive glucose monitoring technique is very important because it would tremendously diminish the need to puncture the skin when taking blood samples and help diabetic patients in controlling their blood glucose levels and in treating Diabetes Mellitus. The focus of this thesis is on measuring the effect of glucose on the light scattering properties of a tissue-simulating phantom and biological tissues in vitro. Optical coherence tomography ...
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    8. Monte Carlo simulation of the optical coherence Doppler tomography signals from blood flows in light scattering media: problem of flow velocity profile reconstruction

      Optical Coherence Tomography (OCT) and Optical Coherence Doppler Tomography (OCDT) signals from one and two plain flows of a non-aggregating particulate suspension mimicking blood embedded into a stationary light scattering medium (2% Intralipid solution) with optical properties close to those of human skin were simulated implementing the Monte Carlo method. The role of multiple scattering in the OCT signals was analyzed. The maximal visualization depths for OCT imaging of different ...
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    9. Effect of multiple scattering on the accuracy of velocity profile reconstruction from the Monte-Carlo simulated OCDT signal in a model of biological tissues

      Using the Monte-Carlo method we simulated the Optical Coherence Doppler Tomography (OCDT) signals at the wavelength of 1 = 822 nm from one and two plain flows of a non-aggregating particulate suspension mimicking blood embedded into a stationary light scattering medium (2% Intralipid solution) with optical properties close to those of human skin. The dependences of statistical characteristics such as mean value and standard deviation of the stochastic fluctuations of the ...
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    10. 31-38 of 38 « 1 2 3
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  2. About Risto A. Myllylä

    Risto A. Myllylä

    Risto Myllylä received the DSc (Eng) degree from the University of Oulu, Finland, in 1976. He has been an associate professor in the Department of Electrical Engineering, University of Oulu, since 1974 and a professor since 1995. From 1988 to 1995 he was a research professor in the Technical Research Centre of Finland. His research interests include industrial and biomedical instrumentation development, particularly in optical measurements. He has co authored two books and more than 500 papers and patents. Dr. Myllylä is a past president of Finnish Optical Society and an Advisory Committee Member of European Optical Society (EOS). He is a member of SPIE (Fellow), OSA, IEEE, and EOS.