Edge Aberration in MRI - Correction of Dislocations in Sub-Voxel Edge Detection: A Proof of Concept
نویسندگان
چکیده
Direct application of conventional models for sub-voxel edge detection to modalities with intricate image formation like MRI results in systematic edge dislocations on a sub-voxel scale (edge aberration). By quantitative experimental analysis of this effect, a simple correction term can be calibrated, which is demonstrated to improve edge localization precision by a factor of 2.5 to surpass voxel size by 2 orders of magnitude. Kurzfassung. Die direkte Anwendung herkömmlicher Modelle zur Subvoxel-Kantendetektion auf Modalitäten komplizierter Bildentstehung wie MRT führt zu systematischen Kantenpositionsfehlern im Subvoxelbereich (Kantenaberration). Mittels quantitativ-experimenteller Untersuchung dieses Effekts kann ein einfacher Korrekturterm bestimmt werden, welcher die Kantenlokalisierungspräzision um den Faktor 2,5 auf 2 Größenordnungen über der Voxelgröße zu verbessern gezeigt wird. This work DOI 10.1007/978-3-642-19335-4 70 originally appeared on 2011-03-20 in Heinz Handels et al. (eds.): Bildverarbeitung für die Medizin 2011. Informatik aktuell. Springer-Verlag Berlin Heidelberg. ISBN 978-3-64219334-7. pp. 339–343 , was presented on 2011-03-21 at Bildverarbeitung für die Medizin, Lübeck, Germany, has been revised upon discussion at said conference, and was re-published on 2011-10-09 online. This latest version as of 2011-11-16 Revisions and corrections appear in red, rectification of errors introduced by the editors are highlited in orange, German translations not present in the original publication appear gray, and recent changes are reflected in blue.
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