Sökning: "Spin echo"

Visar resultat 1 - 5 av 9 uppsatser innehållade orden Spin echo.

  1. 1. Comparison of In Vivo Intramuscular Fat Quantification Techniques in MRI

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

    Författare :Pien Derikx; [2023]
    Nyckelord :Fat-water separation; Dixon technique; Intramuscular fat quantification;

    Sammanfattning : People with cerebral palsy (CP) may develop muscle contractures, which are defined as a loss of joint range due to an increase in passive muscle stiffness [1]. Computer models suggest that intramuscular fat can increase muscle stiffness [2]. LÄS MER

  3. 2. Adiabatic Shortcut to Geometric Quantum Computation in Noiseless Subsystems

    Kandidat-uppsats, Uppsala universitet/Materialteori

    Författare :Anton Gregefalk; [2021]
    Nyckelord :Quantum computer; Spin echo; Adiabatic shortcut; Berry s phase; Noiseless subsystems; Kvantdator; spinn eko; adiabatisk genväg; Berrys fas; Brusfria delsystem;

    Sammanfattning : Quantum computers can theoretically perform certain tasks which classical computers at realistic times could not. Operating a quantum computer requires precise control over the system, for instance achieved by adiabatic evolution, and isolation from the environment to retain coherence. LÄS MER

  4. 3. Orientation of Sticks and Spheres - Estimating Tensor Shape and Orientation Distribution using Diffusion NMR

    Master-uppsats, Lunds universitet/Biofysikalisk kemi

    Författare :Mikael Leveau Novén; [2015]
    Nyckelord :Diffusion NMR; ODF; NMR; Diffusion; biophysical chemistry; biofysikalisk kemi; Chemistry; Technology and Engineering;

    Sammanfattning : The diffusion characteristics of water can be measured by using NMR methods. Specifically, the diffusion profiles in samples containing domains of water barriers are of major importance to be able to describe in applications such as diffusion tensor imaging or diffusion MRI-sequences. LÄS MER

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

    Master-uppsats, Umeå universitet/Institutionen för fysik; Umeå universitet/Radiofysik

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

    Sammanfattning : 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. LÄS MER

  7. 5. High-­dose rate intraluminal brachytherapy for oesophageal cancer using MR imaging: A clinical implementation

    Master-uppsats, Lunds universitet/Sjukhusfysikerutbildningen; Lunds universitet/Medicinsk strålningsfysik, Lund

    Författare :Rrezarta Reci; [2015]
    Nyckelord :Medicine and Health Sciences;

    Sammanfattning : Purpose: The aim of this study was to investigate a new methodology for brachytherapy of oesophageal cancer using magnetic resonance (MR) imaging for treatment planning. That includes finding a suitable oesophageal applicator that can be visualised on MR images and to create dose and fraction schedule that should be used brachytherapy treatments. LÄS MER