Sökning: "T2 mapping"

Visar resultat 6 - 10 av 13 avhandlingar innehållade orden T2 mapping.

  1. 6. Characterization of the BOLD signal in functional MRI

    Författare :Tomas Jonsson; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :;

    Sammanfattning : In the last two decades, functional magnetic resonance imaging (fMRI) has become an important and widely used imaging technique for functional brain mapping. However, blood oxygen level dependent (BOLD) technique is quite insensitive and task invoked BOLD signal change at 3T is typically in the order of a few percent. LÄS MER

  3. 7. Methodological improvements in quantitative MRI : Perfusion estimation and partial volume considerations

    Författare :André Ahlgren; Lund Medicinsk strålningsfysik; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES;

    Sammanfattning : The magnetic resonance imaging (MRI) scanner is a remarkable medical imaging device, capable of producing detailed images of the inside of the body. In addition to imaging internal tissue structures, the scanner can also be used to measure various properties of the tissue. LÄS MER

  4. 8. Traumatic patellar dislocation in childhood : late effects on knee function and cartilage quality

    Författare :Eva Bengtsson Moström; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :;

    Sammanfattning : Background and aim: Acute patellar dislocation affects approximately 1:1000 healthy children 9- 15 years of age, and up to 50% are at risk for recurrent dislocations. In adults the condition is associated with long-term complications, such as osteoarthritis and impairment of knee function. LÄS MER

  5. 9. Development of new MRl-based analysis methods for improved diagnosis of low back pain patients

    Författare :Christian Waldenberg; Göteborgs universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; annular fissure; bone marrow lesion; image analysis; intervertebral disc; intervertebral disc degeneration; low back pain; machine learning; radiomics; texture analysis;

    Sammanfattning : BACKGROUND Low back pain (LBP) is the leading cause of disability worldwide, where three of four individuals experience back pain at some point in their lives. The pathophysiological background of LBP is probably multifactorial, where bone marrow damage, tissue changes in the vertebral endplates, and intervertebral disc (IVD) degeneration have been recognized as tissue changes linked to pain. LÄS MER

  7. 10. Magnetic resonance imaging techniques for diagnostics in Parkinson's disease and atypical parkinsonism

    Författare :Henrik Sjöström; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :;

    Sammanfattning : Background: Parkinson’s disease (PD) is a neurodegenerative disease characterized by rigidity, hypokinesia, tremor and postural instability. PD is a clinical diagnosis based on neurological examination, patient history and treatment response. LÄS MER