Bias artifact suppression on MR volumes

Authors:
E. Ardizzone;R. Pirrone;O. Gambino
Affiliations:
Universitá degli studi di Palermo, DINFO-Dipartimento di Ingegneria Informatica, viale delle Scienze-Ed. 6-3opiano, 90128 Palermo, Italy;Universitá degli studi di Palermo, DINFO-Dipartimento di Ingegneria Informatica, viale delle Scienze-Ed. 6-3opiano, 90128 Palermo, Italy;Universitá degli studi di Palermo, DINFO-Dipartimento di Ingegneria Informatica, viale delle Scienze-Ed. 6-3opiano, 90128 Palermo, Italy
Venue:
Computer Methods and Programs in Biomedicine
Year:
2008

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Abstract

RF-inhomogeneity correction is a relevant research topic in the field of magnetic resonance imaging (MRI). A volume corrupted by this artifact exhibits nonuniform illumination both inside a single slice and between adjacent ones. In this work a bias correction technique is presented, which suppresses this artifact on MR volumes scanned from different body parts without any a priori hypothesis on the artifact model. Theoretical foundations of the method are reported together with experimental results and a comparison is presented with both the 2D version of the algorithm and other techniques that are widely used in MRI literature.