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    Wyświetlanie 1-3 z 3
    Tytuł:
    Extrinsic Optical Fiber Sensor for Medical Audiometric Applications
    Autorzy:
    Prokopczuk, K.
    Poczęsny, T.
    Sobotka, P.
    Domański, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1418093.pdf
    Data publikacji:
    2012-11
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    42.81.Pa
    42.79.Pw
    Opis:
    The paper presents optical fiber sensor designed for medical audiometric measurements. Currently, highly precise audiometric examinations require attachment of reflective element inside the ear. We propose alternative contactless optical and non-invasive method for audiometric applications. Presented sensor utilizes extrinsic intensity modulation combined with interferometric method to measure low amplitude vibrations with flat frequency response curve and no resonance effects. Experiment was performed with tympanic membrane model stimulated by external loudspeaker. Experimental results show usage possibility of presented sensor for laryngological and audiometric tests of ear membrane response, which is important for both diagnosis and implants sensitivity fitting for people with hearing deficits.
    Źródło:
    Acta Physica Polonica A; 2012, 122, 5; 957-961
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Optical Scanner for 3D Radiotherapy Polymer Gel Dosimetry
    Autorzy:
    Sobotka, P.
    Kozicki, M.
    Maras, P.
    Boniecki, Ł.
    Kacperski, K.
    Domański, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1418096.pdf
    Data publikacji:
    2012-11
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    87.50.Gi
    42.66.Si
    87.53.Bn
    Opis:
    Sophisticated techniques employed in radiotherapy for irradiation of tumours require comprehensive dosimetry allowing for precise, high resolution measurements of radiation dose distribution in three dimensions and verification of treatment planning systems. Polymer gel dosimetry has been shown to be a unique technique for such the purpose. If exposed to ionizing radiation, radical polymerisation and crosslinking of monomeric components take place in a 3D polymer gel dosimeter, leading to the formation of large polymeric structures that scatter visible light. This feature allows for optical observation of the effects of the absorbed dose and its distribution. Presently, magnetic resonance imaging is employed most often for the analysis of the 3D polymer gel dosimeters. However, much attention is also being given to the development of optical computed tomography since this technique is hoped to serve as a substitute for expensive and not easily available magnetic resonance imaging. The optical scanner presented in this work consists of a laser diode, a scanning system and a signal detector. A 3D polymer gel dosimeter is measured in an immersion liquid in order to reduce deflection of the light from the dosimeter phantom. The very first results were obtained with the newly constructed scanner and $\text{PABIG}^{nx}$ 3D polymer gel dosimeter, which was inhomogeneously irradiated with $\text{}^{192} Ir$ brachytherapy source. The results have been contrasted with those for the magnetic resonance imaging and are presented in this work together with the description of the developed instrument. Currently, the optimization of the optical scanner is performed.
    Źródło:
    Acta Physica Polonica A; 2012, 122, 5; 969-974
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Polarimetric Optical Fiber Sensors for Dynamic Strain Measurement in Composite Materials
    Autorzy:
    Domański, A.
    Bieda, M.
    Lesiak, P.
    Makowski, P.
    Szeląg, M.
    Poczęsny, T.
    Prokopczuk, K.
    Sobotka, P.
    Chychłowski, M.
    Sierakowski, M.
    Woliński, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/1399338.pdf
    Data publikacji:
    2013-09
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    42.79.Pw
    42.25.Bs
    42.81.Pa
    Opis:
    Polarimetric optical fiber sensors possess possibility of temperature compensation, dynamic and integral system of strain monitoring, as well as low cost of photo-detecting elements. In the paper we present results of the sensor analysis with different kinds of birefringent optical fibers leading to an optimal setup for dynamic strain monitoring in composite materials. A great attention is put on parameters of the light sources like coherence and width of spectrum and their influence on dynamics of the strain sensor.
    Źródło:
    Acta Physica Polonica A; 2013, 124, 3; 399-401
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-3 z 3

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