title: A Gabor-based technique for bias removal in MR images.
abstract: Magnetic Resonance images are often characterized by irregularly displaced luminance fluctuations that are called bias artifact. This disturb is due to a drop in signal intensity caused by the distance between imaged sample and receiver coil. An original approach to bias removal in Magnetic Resonance images is presented, which is based on the use of Gabor filter to extract the artifact. The proposed technique restores the image using a correction model, which is derived from the attenuation of signal diffusion across the tissues. No hypotheses are made about the structure of the tissues under investigation and the used MR spectrum. The approach is presented in detail, and extensive experimental results are reported along with a comparison with other popular techniques for bias removal.
authors.affiliation: Università degli studi di Palermo, DINFO Dipartimento di Ingegneria Informatica, viale delle Scienze, Ed. 6, 3 piano, 90128, Palermo, Italy. ardizzon@unipa.it
authors.forename: Edoardo
authors.initials: E
authors.lastname: Ardizzone
authors.forename: Roberto
authors.initials: R
authors.lastname: Pirrone
authors.forename: Mario
authors.initials: M
authors.lastname: Mastrella
authors.forename: Orazio
authors.initials: O
authors.lastname: Gambino
mesh_terms: D000465:Algorithms; D016477:Artifacts; D007089:Image Enhancement / Q000379:methods*; D007090:Image Interpretation, Computer-Assisted / Q000379:methods*; D008279:Magnetic Resonance Imaging; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D012815:Signal Processing, Computer-Assisted