Sökning: "CT-scanning"

Hittade 5 uppsatser innehållade ordet CT-scanning.

  1. 1. Simulating metal ct artefacts for ground truth generation in deep learning.

    Master-uppsats, Lunds universitet/Avdelningen för Biomedicinsk teknik

    Författare :Arthur Barakat; [2023]
    Nyckelord :Technology and Engineering;

    Sammanfattning : CT scanning stands as one of the most employed imaging techniques used in clinical field. In the presence of metal implants in the field of view (FOV), distortions and noise appear on the 3D image leading to inaccurate bone segmentation, often required for surgery planning or implant design. LÄS MER

  3. 2. An Application of Channelized Hotelling Observer for Optimization of CT Scanning Protocols

    Master-uppsats, Uppsala universitet/Institutionen för informationsteknologi

    Författare :Yuting Wang; [2022]
    Nyckelord :;

    Sammanfattning : Low contrast detection tasks like detecting a lesion in an image are of high importance in medical image diagnostics. If performed by human observers, the results are subjective, and the reproducibility is limited. LÄS MER

  4. 3. Phase-Contrast Imaging, Towards G2-less Grating Interferometry With Deep Silicon

    Master-uppsats, KTH/Fysik

    Författare :Rickard Brunskog; [2022]
    Nyckelord :Phase-contrast imaging; phase-contrast; CT-scanning; Computed-tomography; 1 micrometer resolution x-ray; grating-less phase-contrast imaging; Faskontraströntgen; faskontrast; CT-skanning; 1 mikrometer upplösning x-ray; gitterlös faskontrast; datortomografi;

    Sammanfattning : Conventional phase-contrast imaging entails stepping an analyser grating across the detector to resolve the interference pattern caused by the x-rays after passing through a series of gratings in a so-called Talbot-Lau interferometer. However, the analyser grating in the interferometer poses a challenge, not only due to the machinery and alignment required but also due to each exposure delivering a dose to the subject. LÄS MER

  5. 4. The impact of feed and diet on crickets’ nutritional value and anatomy

    Uppsats för yrkesexamina på avancerad nivå, SLU/Dept. of Anatomy, Physiology and Biochemistry

    Författare :Gabriella Håkansson; [2018]
    Nyckelord :cricket; house cricket; Cambodian field cricket; Teleogyrus testaceus; entomophagy; protein quality; computer tomography;

    Sammanfattning : Denna studie utvärderar den kemiska sammansättningen hos kambodjanska syrsor (Teleogyrus testaceus) uppfödda på fyra olika dieter. Syrsor från en tidigare studie (Miech et al., 2016) om tillväxt och överlevnad användes i studien. Aminosyrakomposition, mineralinnehåll, vikt och storlek analyserades. LÄS MER

  7. 5. System for dose audit for external radiation therapy based on EPR dosimetry with Lithium Formate

    Master-uppsats, Fysikum

    Författare :Zelga Malke; [2010]
    Nyckelord :Dose; audit;

    Sammanfattning : Radiation therapy is an important method to treat cancer with the aim to deliver as high doses as reasonably achievable to the tumor while protecting the surrounding healthy tissue and organs at risk, OARs. Therefore, it is essential to have high accuracy in the dose delivered clinically and quality assurances are required. LÄS MER