Sökning: "CTA image"

Visar resultat 1 - 5 av 6 uppsatser innehållade orden CTA image.

  1. 1. Coronary Artery Plaque Segmentation with CTA Images Based on Deep Learning

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

    Författare :Zhang Shuli; [2022]
    Nyckelord :Coronary Plaque Segmentation; CTA image; nnU-Net; FCDD; Anomaly Detection; Koronarplacksegmentering; CTA-bild; nnU-Net; FCDD; Anomalidetektering;

    Sammanfattning : Atherosclerotic plaque is currently the leading cause of coronary artery disease (CAD). With the help of CT images, we can identify the size and type of plaque, which can help doctors make a correct diagnosis. To do this, we need to segment coronary plaques from CT images. LÄS MER

  3. 2. Seeing Stars - Intensity Interferometry in the Laboratory and on the Ground

    Master-uppsats, Lunds universitet/Astronomi - Genomgår omorganisation

    Författare :Colin Carlile; [2021]
    Nyckelord :Stellar Physics Instrumentation Interferometry Cherenkov Telescope Array Intensity Interferometry; Physics and Astronomy;

    Sammanfattning : Context Since the time of Tycho Brahe astronomy has been an observing science defined by the quality of its instrumentation. The introduction of primitive telescopes by Galileo in 1609 began a period of development of ever-larger telescopes with greater measuring precision. LÄS MER

  4. 3. Estimation of Noise and Contrast for CTA of the Brain

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

    Författare :Johannes Loberg; Miranda Gisudden; [2018]
    Nyckelord :CT - Computed Tomography - CTA- Computed Tomography Angiography - Photon Counting - CNR - Contrast to noise;

    Sammanfattning : Computed tomography angiography (CTA) of the brain poses challenges on the imaging system; the contrast between blood vessels and surrounding soft tissue is very low, and to render small intricate vessel structures high spatial resolution is needed. Higher precision angiography would facilitate more accurate diagnosis of pathological conditions. LÄS MER

  5. 4. Automated Segmentation of the Pericardium Using a Feature Based Multi-atlas Approach

    Master-uppsats, Lunds universitet/Matematik LTH

    Författare :Alexander Norlén; [2014]
    Nyckelord :computer vision; medical image analysis; multi-atlas segmentation; feature based registration; Markov Random Fields; pericardium segmentation; Mathematics and Statistics;

    Sammanfattning : Multi-atlas segmentation is a widely used method that has proved to work well for the problem of segmenting organs in medical images. But standard methods are time consuming and the amount of data quickly grows to a point making use of these methods intractable. LÄS MER

  7. 5. Imaging stellar surfaces with intensity interferometry

    Master-uppsats, Lunds universitet/Astronomi - Genomgår omorganisation; Lunds universitet/Institutionen för astronomi och teoretisk fysik - Genomgår omorganisation

    Författare :Lagadec Tiphaine; [2014]
    Nyckelord :Interferometry; Intensity interferometry; Second order coherence; Aperture synthesis; High resolution imaging; Stellar surfaces imaging; Cherenkov Telescope Array.; Physics and Astronomy;

    Sammanfattning : Context. Intensity interferometry was invented and used by R.Hanbury Brown and R.Q. LÄS MER