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Magnetfältstyrkans betydelse för personer med multipel skleros eller kliniskt isolerat syndrom: en litteraturstudie
Umeå University, Faculty of Medicine, Department of Nursing.
Umeå University, Faculty of Medicine, Department of Nursing.
2016 (Swedish)Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesisAlternative title
The importance of magnetic field strength for people with multiple sclerosis or clinically isolated syndrome : a literature study (English)
Abstract [sv]

Titel: Magnetfältstyrkans betydelse för personer med multipel skleros eller kliniskt isolerat syndrom - en litteraturstudie Bakgrund: Multipel skleros (MS) är en demyeliniserande autoimmun sjukdom i centrala nervsystemet som debuterar främst hos unga vuxna. MS diagnostiseras utifrån kliniska och radiologiska fynd enligt McDonaldkriterierna där inga krav ställs på vilken fältstyrka som bör användas. Magnetkameror med högre fältstyrkor blir dock vanligare. Syfte: Att undersöka om högre fältstyrka (Tesla, T) gav bättre detektion av lesioner vid magnetresonanstomografiundersökningar av personer med multipel skleros eller kliniskt isolerat syndrom. Metod: I denna litteraturstudie gjordes sökningarna i databaserna PubMed, Web of Science och Scopus mellan 8 och 11 mars 2016. Tio kvantitativa artiklar kvalitetsgranskades och analyserades för att slutligen sammanställas i resultatet. Resultat: Resultatet presenteras under fyra huvudrubriker och totalt tolv underrubriker. Huvudrubrikerna är skillnad mellan fältstyrkor, fältstyrkor och anatomiska regioner, fältstyrkor och pulssekvenser samt artefakter och bildkvalitet. Konklusion: 3T och 7T är bättre än 1,5T och att 7T ofta är bättre än 3T på att detektera lesioner. Dock måste andra aspekter tas i beaktning då det är många parametrar som spelar in vid en magnetresonanstomografiundersökning. Ytterligare studier gällande bland annat optimering av pulssekvenser samt patienters upplevelser av ultrahöga fältstyrkor rekommenderas. 

Abstract [en]

Title: The importance of magnetic field strength for people with multiple sclerosis or clinically isolated syndrome - a literature study. Background: Multiple sclerosis (MS) is an autoimmune demyelinating disease of the central nervous system debuting mostly in young adults. MS is diagnosed based on clinical and radiological findings according to the McDonald criteria where no requirements are placed on which field strength that should be used. Magnetic resonance imaging (MRI) scanners with higher field strengths are however becoming more common. Objective: To investigate whether higher field strength (Tesla, T) gave better detection of lesions at MRI examinations of people with MS or clinically isolated syndrome. Methods: In this literature study searches were made in the databases PubMed, Web of Science and Scopus between the 8th and 11th of March 2016. Ten quantitative articles were examined and analyzed to finally be compiled under the results. Results: The results are presented under four main headings and twelve sub- headings. The main headings are the differences between field strengths, field strength and anatomical regions, field strength and pulse sequences and artifacts and image quality. Conclusion: 3T and 7T are better than 1,5T and 7T is usually better than 3T at detecting lesions. However other aspects need to be taken into account because many parameters come into play during MRI examinations. Further studies regarding optimization of pulse sequences and field strength and patients’ experiences of ultrahigh field strength are recommended, among others. 

Place, publisher, year, edition, pages
2016. , 33 p.
Keyword [en]
multiple sclerosis, magnetic resonance tomography, field strength, lesions, clinically isolated syndrome
Keyword [sv]
multipel skleros, magnetresonanstomografi, fältstyrka, lesioner, kliniskt isolerat syndrom
National Category
Radiology, Nuclear Medicine and Medical Imaging Nursing
Identifiers
URN: urn:nbn:se:umu:diva-120001OAI: oai:DiVA.org:umu-120001DiVA: diva2:926164
Educational program
Diagnostic Radiology Nursing Programme; Diagnostic Radiology Nursing Programme
Supervisors
Examiners
Available from: 2016-06-13 Created: 2016-05-04 Last updated: 2016-06-13Bibliographically approved

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