Sökning: "Faskontrastavbildning"

Hittade 3 uppsatser innehållade ordet Faskontrastavbildning.

  1. 1. 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

  3. 2. Black-Blood Phase Contrast Magnetic Resonance Imaging using Stimulated Echo Acquisition Mode : Pulse Sequence Development

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

    Författare :Reenalyn Borromeo; [2020]
    Nyckelord :MRI; phase contrast; black blood; STEAM; myocardial motion; MRI; magnetisk resonanstomografi; faskontrast; blodutsläckning; STEAM; myokardiell rörelse;

    Sammanfattning : Doppler echocardiography is the conventional method for measurement of myocardial motion. However, the same clinical parameters can be measured with phase contrast magnetic resonance imaging (MRI). LÄS MER

  4. 3. Iterative Reconstruction Algorithm for Phase-Contrast X-Ray Imaging

    Kandidat-uppsats, KTH/Medicinteknik och hälsosystem

    Författare :Ahmad Sadek; Ruben Pozzi; [2020]
    Nyckelord :Computed tomography; Medical research; Phase-contrast imaging; Propagation-based imaging; SIRT; Iterative algorithm; Paganin’s phase-retrieval; Datortomografi; Medicinsk forskning; Faskontrastavbildning; Propagation-baserad avbildning; SIRT; Iterativ algoritm; Paganins fasåterhämtning;

    Sammanfattning : Phase-contrast imaging (PCI) is a modality of medical x-ray imaging that can solve one of the main limitations with conventional attenuation-based imaging: the imaging of materials with low attenuation coefficients, such as soft tissues. A modality of PCI, Propagation-based phase-contrast imaging (PBI), was used in this project. LÄS MER