Sökning: "7 Tesla MRI"

Visar resultat 1 - 5 av 10 avhandlingar innehållade orden 7 Tesla MRI.

1. 1. Gradient echo-based quantitative MRI of human brain at 7T : Mapping of T1, MT saturation and local flip angle

   Författare :Hampus Olsson; Lund Medicinsk strålningsfysik; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; MR studies; magnetic resonance MR ; 7 Tesla; T1 mapping; magnetization transfer saturation; Flip angle mapping; spoiled gradient echo; MR studies; magnetic resonance MR ; 7T; T1 mapping; magnetization transfer saturation; Flip angle mapping; spoiled gradient echo;

   Sammanfattning : Quantitative MRI (qMRI) refers to the process of deriving maps of MR contrast parameters, such as relaxation times, from conventional images. If the qMRI maps have a high degree of precision and a low degree of bias, they can be compared longitudinally, across subjects, and (ideally) between measurement protocols and research sites. LÄS MER

3. 2. Characterization of the MRI patient exposure environment and exposure assessment methods for magnetic fields in MRI scanners

   Författare :Jennifer Frankel; Jonna Wilén; Anders Garpebring; Johan Olsrud; Peter Lundberg; Umeå universitet; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; electromagnetic fields; exposure assessment; magnetic resonance imaging; switched gradient fields; radiofrequency fields; exposure metrics; radiofysik; radiation physics;

   Sammanfattning : Magnetic resonance imaging (MRI) has become one of the most common imaging modalities available in modern medicine, and it is an indispensable diagnostic tool thanks to the unparalleled soft-tissue contrast and high image resolution. It is also a unique exposure environment consisting of a complex mix of magnetic fields. LÄS MER

4. 3. MRI quantification of multiple sclerosis pathology

   Författare :Russell Ouellette; Karolinska Institutet; Karolinska Institutet; []
   Nyckelord :;

   Sammanfattning : Background: Multiple sclerosis (MS) is a chronic neuroinflammatory and neurodegenerative disease and a common cause of neurologic disability. MS pathology is characterized by demyelination, neuroaxonal loss and atrophy. LÄS MER

5. 4. Quantitative MRI Biomarkers of Neurodegeneration in Multiple Sclerosis

   Författare :Michael Platten; Tobias Granberg; Chunliang Wang; Fredrik Piehl; Sara Shams; Mattias Vågberg; KTH; Karolinska Institutet; Karolinska Institutet; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Machine learning; Multiple sclerosis; Corpus callosum; Neurodegeneration; Medical Technology; Medicinsk teknologi;

   Sammanfattning : Background: Multiple sclerosis (MS) is a chronic neuroinflammatory and neurodegenerative disease that targets myelin in the brain and spinal cord. The corpus callosum connects the cerebral hemispheres and is composed of heavily myelinated axons. LÄS MER

7. 5. Nanoparticles : Engineering, Assembly, and Biomedical Applications

   Författare :Do Kyung Kim; KTH; []
   Nyckelord :nanoparticle; superparamagnetism; self assembly; ;

   Sammanfattning : This thesis deals with novel aspects through Nanotechnologyof"bottom-up"and"top-down"strategies in combination with Biotechnology as aninterdisciplinary study. The feasibility of chemically tailoredsuperparamagnetic iron oxide nanoparticles (SPION) forin-vivobiomedical applications has beendemonstrated. LÄS MER