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Showing result 1 - 5 of 24 essays matching the above criteria.

  1. 1. Simulations and modeling of light propagation in biological tissue

    University essay from Lunds universitet/Förbränningsfysik; Lunds universitet/Fysiska institutionen; Lunds universitet/Lunds Tekniska Högskola

    Author : Emma Hjörneby; [2023]
    Keywords : Technology and Engineering;

    Abstract : The GASMAS technique has previously proven useful for examining and measuring the oxygen concentration in the lungs of preterm infants. GASMAS can distinguish absorption by one gas from the bulk absorption of the surrounding media, and can provide an instant, non-invasive and non-destructive way of examining lungs, and diagnosing dangerous conditions such as pneumothorax. READ MORE

  3. 2. Gas in Scattering Media Absorption Spectroscopy in Large Geometries: Towards Monitoring Oxygen in Adult Lungs

    University essay from Lunds universitet/Förbränningsfysik; Lunds universitet/Fysiska institutionen

    Author : Anna Brandt; [2022]
    Keywords : Physics and Astronomy;

    Abstract : GAs in Scattering Media Absorption Spectroscopy (GASMAS) is a technique to study free gas inside strongly scattering bulk-materials. GASMAS is successful in safely measuring oxygen in lungs of neonates, with low-power tuneable diode-laser spectroscopy at 760 nm. READ MORE

  4. 3. Neutrino oscillations at very high energy/matter density

    University essay from KTH/Fysik

    Author : Mathilde Guillaud; [2020]
    Keywords : Theoretical Physics; Neutrino Oscillations; Astrophysical Neutrinos; Teoretisk fysik; Neutrinooscillationer; Astrofysiska neutriner;

    Abstract : Neutrino oscillations in matter can be studied in different regimes, depending on the energy of the incoming neutrinos and the matter density of the medium. In this thesis we investigate neutrino oscillations in dense matter at very high energy (TeV-PeV range), taking into account the absorption that the neutrinos may undergo in such dense media. READ MORE

  5. 4. Weather Influence on LiDAR Signals using the Transient Radiative Transfer and LiDAR Equations

    University essay from Luleå tekniska universitet/Institutionen för system- och rymdteknik

    Author : Marcus Hedlund; [2020]
    Keywords : Radiative transfer; LiDAR; Transient radiative transfer;

    Abstract : The ongoing development of self driving cars requires accurate measuring devices and the objective of this thesis was to investigate how di↵erent weather will affect one of these devices, known as a LiDAR. A LiDAR uses pulsed laser light to measure the distance to an object. READ MORE

  6. 5. Developing a technique for combining light and ultrasound for deep tissue imaging

    University essay from Lunds universitet/Atomfysik; Lunds universitet/Fysiska institutionen

    Author : Meng Li; [2018]
    Keywords : UOT; Ultrasound Optical Tomography; Monte Carlo; TCSPC; PTOF; Photon time of flight; Ultrasound; US; AOT; Acousto-optical tomography; Spectral hole burning; SHB; ultrasound modulation; Physics and Astronomy;

    Abstract : Biological tissues are strongly light-scattering and absorbing media that limit the depth of optical-based imaging. Even though, optical imaging provides good optical contrast information of biological content that is beneficial for clinical diagnostics application. READ MORE