Sökning: "Laser speckle contrast imaging"

Visar resultat 1 - 5 av 8 uppsatser innehållade orden Laser speckle contrast imaging.

1. 1. Real-time Autofocus Algorithm in Laser Speckle Contrast Imaging

   Master-uppsats, KTH/Skolan för kemi, bioteknologi och hälsa (CBH)

   Författare :Giovanni Russo; [2023]
   Nyckelord :Laser speckle contrast imaging; Autofocus; Blind image sharpness assessment; Speckle noise; Perimed’s Perfusion Speckle Imager;

   Sammanfattning : Microcirculation is defined as the blood flow in the smallest blood vessels. Laser speckle contrast imaging (LSCI) is a full field imaging technique that provides instantaneous 2-D perfusion maps of illuminated tissues based on speckle contrast. LÄS MER

3. 2. Detection of local motion artifacts and image background in laser speckle contrast imaging

   Master-uppsats, Linköpings universitet/Institutionen för medicinsk teknik

   Författare :Johannes Nyhlén; Märta Sund; [2023]
   Nyckelord :laser speckle contrast imaging; lsci; multi exposure laser speckle contrast imaging; melsci; machine learning; deep learning; statistical analysis; detection; local motion artifacts; 1D; 2D; 3D;

   Sammanfattning : Laser speckle contrast imaging (LSCI) and its extension, multi-exposure laser speckle contrast imaging (MELSCI) are non-invasive techniques to monitor peripheral blood perfusion. One of the main drawbacks of LSCI and MELSCI in clinical use is that the techniques are sensitive to tissue movement. LÄS MER

4. 3. Quantification and Detection of Motion Artifacts in Laser Speckle Contrast Imaging

   Master-uppsats, KTH/Skolan för kemi, bioteknologi och hälsa (CBH)

   Författare :Dennis Amphan; [2022]
   Nyckelord :Laser speckle contrast imaging; Image registration; Motion artifacts; Detection;

   Sammanfattning : Laser speckle contrast imaging (LSCI) is a non-invasive method for assessment of microcirculatory blood flow. The technique is based on analysis of speckle patterns to build 2D maps of perfusion with high spatial and temporal resolution. LÄS MER

5. 4. Semantic segmentation using convolutional neural networks to facilitate motion tracking of feet : For real-time analysis of perioperative microcirculation images in patients with critical limb thretening ischemia

   Master-uppsats, Linköpings universitet/Avdelningen för medicinsk teknik

   Författare :Andreas Öberg; Martin Hulterström; [2021]
   Nyckelord :semantic segmentation; convolutional neural network; critical limb threatening ischemia; ROI tracking; deep learning;

   Sammanfattning : This thesis investigates the use of Convolutional Neural Networks (CNNs) toperform semantic segmentation of feet during endovascular surgery in patientswith Critical Limb Threatening Ischemia (CLTI). It is currently being investigatedwhether objective assessment of perfusion can aid surgeons during endovascularsurgery. LÄS MER

7. 5. Skin dose measurement during radiation therapy of mastectomy patients using GafChromicTM EBT3 films.

   Master-uppsats, Linköpings universitet/Institutionen för medicinsk teknik

   Författare :Madeleine Bergström; [2017]
   Nyckelord :Mastectomy; Radiation therapy; GafChromic; EBT3; microcirculation;

   Sammanfattning : Purpose: The aim of this study was to develop a method of measuring changes in the skin microcirculation and skin dose for mastectomy patients in connection with the radiation treatment. The distribution of the skin dose, its dependence on the energy of the beam, field geometry and bolus material and the accuracy of the given skin dose in the treatment planning system were studied. LÄS MER