Susceptibility and chemical shift in MRI
Résumé
Geometrical distortion in Magnetic Resonance Images can be classified in two main categories : non-linear gradient fields and static and patient induced field heterogenetity. The first kind is machine dependent and can be corrected by calibration or post processing. The second kind will be the one discussed in this paper. It can be important near the skull. Since some registration techniques use these landmarks, field heterogeneity must be corrected for accurate registration.
Domaines
Traitement des images [eess.IV]
Origine : Fichiers produits par l'(les) auteur(s)
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