Sökning: "gas in scattering media absorption spectroscopy"

Visar resultat 1 - 5 av 6 uppsatser innehållade orden gas in scattering media absorption spectroscopy.

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

   Master-uppsats, Lunds universitet/Förbränningsfysik; Lunds universitet/Fysiska institutionen

   Författare :Anna Brandt; [2022]
   Nyckelord :Physics and Astronomy;

   Sammanfattning : 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. LÄS MER

3. 2. Optimization of measurement geometry for GASMAS lung function monitoring of infants

   Master-uppsats, Lunds universitet/Förbränningsfysik; Lunds universitet/Fysiska institutionen

   Författare :Dennis Leander; [2018]
   Nyckelord :tissue phantom; premature infants; lungs; gas in scattering media absorption spectroscopy; tunable diode laser absorption spectroscopy; Physics and Astronomy; Medicine and Health Sciences;

   Sammanfattning : A technique for measuring oxygen concentration in the lungs of preterm infants is one of the latest advancements in neonatal care. It is called GAs in Scattering Media Absorption Spectroscopy (GASMAS) and enables non-invasive, bed-side monitoring of the lung function of our most fragile patients, preterm newborns. LÄS MER

4. 3. Diode laser spectroscopy for oxygen detection in the lungs of infants

   Master-uppsats, Lunds universitet/Fysiska institutionen; Lunds universitet/Atomfysik

   Författare :Peilang Liao; [2016]
   Nyckelord :GASMAS; Tunable laser; Transport theory; 3D phantom; Diagnoses; Gas; Lung; Physics and Astronomy;

   Sammanfattning : This thesis work is part of a larger project with final goal to be able to measure the oxygen concentration in the lungs of infants, using non-invasive laser spectroscopy. This thesis is specifically dealing with simulations of light transport through the upper body of infants, as well as constructing a tissue-like model (phantom) that can be used in experiments. LÄS MER

5. 4. Laser spectroscopic studies on scattering media - Application to food packages and wood materials

   Magister-uppsats, Lunds universitet/Fysiska institutionen; Lunds universitet/Atomfysik

   Författare :Jim Larsson; [2014]
   Nyckelord :food packages; absorption spectroscopy; wood; diode lasers; scattering media; Physics and Astronomy;

   Sammanfattning : In this project, an optical technique called gas in scattering media absorption spectroscopy (GASMAS) has been employed to investigate optical properties in scattering media such as food packages and wood materials. The GASMAS technique has been combined with a technique called frequency domain photon migration (FDPM) and from the integrated system the gas absorption signal and total optical path length have been assessed when measuring on milk packages. LÄS MER

7. 5. Development of a spectroscopic technique for assessment of optical properties and gas content in porous turbid media

   Kandidat-uppsats, Lunds universitet/Fysiska institutionen; Lunds universitet/Atomfysik

   Författare :Jim Larsson; [2012]
   Nyckelord :Spectroscopy; Wood; Equipment and techniques; Physics and Astronomy;

   Sammanfattning : In this thesis a novel spectroscopic method consisting of a combination of frequency domain photon migration (FPDM) and gas in scattering media absorption spectroscopy (GASMAS) is developed, for assessment of the mean optical path length and gas absorption in porous media. The system stability is experimentally investigated and measurements are performed on balsa and pine wood to evaluate the relative optical porosity (ROP). LÄS MER