liu.seSök publikationer i DiVA
Ändra sökning
RefereraExporteraLänk till posten
Permanent länk

Direktlänk
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • oxford
  • Annat format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annat språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf
Performance of canonical correlation analysis in language tests by functional MRI
Linköpings universitet, Institutionen för medicin och vård, Radiologi. Linköpings universitet, Hälsouniversitetet.
Linköpings universitet, Institutionen för medicin och vård, Centrum för medicinsk bildvetenskap och visualisering. Linköpings universitet, Hälsouniversitetet.ORCID-id: 0000-0002-2167-2450
Linköpings universitet, Institutionen för medicinsk teknik. Linköpings universitet, Hälsouniversitetet.ORCID-id: 0000-0002-9091-4724
Linköpings universitet, Institutionen för medicin och vård, Medicinsk radiofysik. Linköpings universitet, Hälsouniversitetet.ORCID-id: 0000-0001-8661-2232
Visa övriga samt affilieringar
(Engelska)Manuskript (preprint) (Övrigt vetenskapligt)
Abstract [en]

In this paper a new method based on constraitwd canonical correlation analysis (CCA) for the analysis of fMRI data is evaluated. In particular the method benefits from a powerful way of choosing temporal basis functions in additiou to an adaptive spatial filtering scheme. A modified receiver operating characteristic (ROC) method was used to quantify the results and to compare it with traditionally used statistics in an objective way. The evaluation was performed using real fMRI data form a language test. It was shown that the CCA based method offers a significant gain in detection power.

Nationell ämneskategori
Medicin och hälsovetenskap
Identifikatorer
URN: urn:nbn:se:liu:diva-97715OAI: oai:DiVA.org:liu-97715DiVA, id: diva2:650285
Tillgänglig från: 2013-09-20 Skapad: 2013-09-20 Senast uppdaterad: 2014-10-02
Ingår i avhandling
1. Application of fMRI in clinical situations
Öppna denna publikation i ny flik eller fönster >>Application of fMRI in clinical situations
2006 (Engelska)Licentiatavhandling, sammanläggning (Övrigt vetenskapligt)
Abstract [en]

Since its discovery in the early 1990's functional MRI (fMRI) has become the most widely used technique for mapping of brain functions. Its non-invasiveness and the large number of MR-scanners have contributed to the popularity of fMRI. In recent years the interest in using fMRI as a clinical instrument has increased, primarily for pre-operative planning. The purpose of this work is to improve the applicability of fMRI to clinical situations.

In order to attain the objectives the capacity of analysis methods for fMRI was evaluated, design of paradigms to suit patients was looked into and the effects of an anxiolytic was investigated.

Especially when fMRI is used in the clinic it is crucial that the analysis method employed is sensitive and reliable. It was confirmed that the method developed by Friman et al. is a worthy competitor to other analysis methods. In general the abilities of patients are reduced compared with healthy volunteer subjects. Therefore one has to design the tasks and task instructions to be readily comprehensible. In addition it is not uncommon that patients are anxious before the examinations and the unfamiliar environment in the MR department. Some need a small dose of an anxiolytic to be able to undergo the examination. The effect of an anxiolytic on healthy volunteers was evaluated. No effects on the fMRI results was identified but the results were confounded by a large session effect.

Ort, förlag, år, upplaga, sidor
Linköping: Linköpings universitet, 2006. s. 83
Serie
Linköping Studies in Health Sciences. Thesis, ISSN 1100-6013 ; 76
Nationell ämneskategori
Medicin och hälsovetenskap
Identifikatorer
urn:nbn:se:liu:diva-36015 (URN)29386 (Lokalt ID)91-85497-79-7 (ISBN)29386 (Arkivnummer)29386 (OAI)
Presentation
2006-05-02, Wranne-salen, Hälsouniversitet, Linköping, 08:30 (Svenska)
Tillgänglig från: 2009-10-10 Skapad: 2009-10-10 Senast uppdaterad: 2013-09-20

Open Access i DiVA

Fulltext saknas i DiVA

Personposter BETA

Ragnehed, MattiasEngström, MariaKnutsson, HansLundberg, PeterSöderfeldt, Birgitta

Sök vidare i DiVA

Av författaren/redaktören
Ragnehed, MattiasEngström, MariaKnutsson, HansLundberg, PeterSöderfeldt, Birgitta
Av organisationen
RadiologiHälsouniversitetetCentrum för medicinsk bildvetenskap och visualiseringInstitutionen för medicinsk teknikMedicinsk radiofysikInstitutionen för nervsystem och rörelseorgan
Medicin och hälsovetenskap

Sök vidare utanför DiVA

GoogleGoogle Scholar

urn-nbn

Altmetricpoäng

urn-nbn
Totalt: 160 träffar
RefereraExporteraLänk till posten
Permanent länk

Direktlänk
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • oxford
  • Annat format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annat språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf