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Found 5 essays matching the above criteria.

  1. 1. Privacy-preserving Building Occupancy Estimation via Low-Resolution Infrared Thermal Cameras

    University essay from KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Author : Shuai Zhu; [2021]
    Keywords : Building occupancy estimation; People counting; Privacy-preserving; Low-resolution thermal camera; Multiple Object Detection; Multiple Object Tracking; Uppskattning av bebyggelse; personräkning; integritetsbevarande; värmekamera med låg upplösning; detektering av flera objekt; spårning av flera objekt;

    Abstract : Building occupancy estimation has become an important topic for sustainable buildings that has attracted more attention during the pandemics. Estimating building occupancy is a considerable problem in computer vision, while computer vision has achieved breakthroughs in recent years. READ MORE

  3. 2. Evaluation of astructured-light 3D-scanner for respiratory gating in PET/CT in a clinical setting

    University essay from KTH/Medicinteknik och hälsosystem

    Author : Elin Wessel; [2018]
    Keywords : ;

    Abstract : In this study a structured light prototype device was evaluated for the possible use as a respiratory gating device in PET/CT. The device functions by measuring the movement in the vertical direction of the obtained 3D-surface of the chest and abdomen with the breathing. READ MORE

  4. 3. Mosaicing of Fetoscopic Acquired Images using SIFT and FAST

    University essay from KTH/Skolan för datavetenskap och kommunikation (CSC)

    Author : Simon Fransson; [2017]
    Keywords : Mosaicing; Image stitching; Twin-to-Twin Transfusion Syndrome; SIFT; FAST; Homography; RANSAC; fetoscopy;

    Abstract : This is a study exploring how robust one feature descriptors, scale invariant feature transform (SIFT), and one feature detector, feature accelerated segmentation test (FAST), are in terms of handling fetoscopic acquired data when mosaicing. Today’s treatment of severe Twin-to-Twin Transfusion Syndrome at Karolinska University Hospital is fetoscopic guided laser occlusion of chorioangiopagous vessels (FLOC) where intersecting blood vessels causing a transfusion (Anastomoses) in between the fetuses are occluded. READ MORE

  5. 4. Development of a Quality Assurance Strategy for Magnetic Resonance Imaging in Radiotherapy

    University essay from Umeå universitet/Institutionen för fysik; Umeå universitet/Radiofysik

    Author : Kristina Sandgren; [2015]
    Keywords : MRI; magnetic resonance imaging; PET MRI; quality assurance; strategy; radiotherapy;

    Abstract : Radiotherapy is a common treatment option for malignant tumors. The use of magnetic resonance imaging in radiotherapy is increasing world-wide and sets additional requirements on the image quality compared to diagnostics applications. READ MORE

  6. 5. Quality Assurance of the Spatial Accuracy of Large Field of View Magnetic Resonance Imaging

    University essay from KTH/Skolan för teknik och hälsa (STH)

    Author : Fredrik Illerstam; [2014]
    Keywords : MRI; MR; spatial accuracy; spatial distortions; large FOV; MR-only; radiotherapy treatment planning; RTP; gradient non-linearity; B0 inhomogeneity;

    Abstract : In todays Radiotherapy Treatment Planning, RTP, it is common to use Computed Tomography, CT, together with Magnetic Resonance Imaging, MRI, where CT provides electron density information and a geometrical reference, and where MRI provides superior soft tissue contrast. To sim- plify the workflow and improve treatment accuracy, research groups have demonstrated how to exclude CT and use a MRI-only approach. READ MORE