Sökning: "cine MRI"

Hittade 5 uppsatser innehållade orden cine MRI.

  1. 1. Phase Unwrapping MRI Flow Measurements

    Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Avdelningen Vi3

    Författare :Mio Liljeblad; [2023]
    Nyckelord :phase unwrapping; computer vision; cine MRI; NMR; flow measurements; velocity encoding; venc; energy minimization; magnetic resonance; cardiac MRI; sinotubuar junction; pulmonary artery; ascending descending aorta; laplacian algorithm; iterative graph cuts; IGC; sequential tree-reweighted message passing; TRW-S; velocity to noise ratio; VNR; retrospective wrapping; energy formulation;

    Sammanfattning : Magnetic resonance images (MRI) are acquired by sampling the current of induced electromotiveforce (EMF). EMF is induced due to flux of the net magnetic field from coherent nuclear spins with intrinsic magnetic dipole moments. LÄS MER

  3. 2. Designing k-Space Filters to Improve Spatiotemporal Resolution with Sector-Wise Golden Angle (SWIG)

    Master-uppsats, KTH/Medicinteknik och hälsosystem

    Författare :Jonas Ström Seez; [2022]
    Nyckelord :Cardiovascular Magnetic Resonance Imaging CMR ; k-Space Filter; Sector Wise Golden-angle SWIG ; Kardiovaskulär Magnetisk Resonans Tomografi CMR ; k-rumsfilter; Sektorsvis Gyllene Vinkel SWIG ;

    Sammanfattning : The aim of this thesis is to design and evaluate k-space weighting filters for simultaneously improving the spatial and temporal resolution of cardiovascular MRI, with the ultimate goal of improving the accuracy of quantitative flow measurements, which are important for diagnosis and follow-up of heart dysfunction. Two different k-space filters were implemented and evaluated retrospectively to already acquired data. LÄS MER

  4. 3. Automatic Alignment of 2D Cine Morphological Images Using 4D Flow MRI Data

    Master-uppsats, Linköpings universitet/Datorseende

    Författare :Victoria Härd; [2016]
    Nyckelord :;

    Sammanfattning : Cardiovascular diseases are among the most common causes of death worldwide. One of the recently developed flow analysis technique called 4D flow magnetic resonance imaging (MRI) allows an early detection of such diseases. LÄS MER

  5. 4. Simultaneous Reconstruction of Respiratory and Cardiac Motion from Cine Magnetic Resonance Imaging

    Master-uppsats, Lunds universitet/Matematik LTH

    Författare :Kenneth John Batstone; [2014]
    Nyckelord :medical imaging; left ventricle reconstruction; respiratory motion; real-time cardiac MRI; Mathematics and Statistics;

    Sammanfattning : Cardiovascular diseases are currently the leading cause of death in the world, which killed nearly 17 million people in 2011. For this reason, research in Cardiovascular diseases are of the up-most importance. LÄS MER

  7. 5. Towards and Understanding of the Dynamics and Energy Efficiency of the Human Heart by Mathematical Modelling

    Uppsats för yrkesexamina på avancerad nivå, Lunds universitet/Institutionen för reglerteknik

    Författare :Patrik Hersenius; [2007]
    Nyckelord :Technology and Engineering;

    Sammanfattning : This thesis is focused on modelling the pumping of the human heart. The modelling is limited to the left heart. Flows through the left heart were visualized by pathlines, streamlines and curl from 3D-velocity data acquired using 3D-velocity encoded magnetic resonance imaging (MRI). LÄS MER