title: A method of radio-frequency inhomogeneity correction for brain tissue segmentation in MRI.
abstract: An automatic method of correcting radio-frequency (RF) inhomogeneity in magnetic resonance images is presented. The method considers that image intensity variation due to radio-frequency inhomogeneity contains not only low frequency components, but also high frequency components. The variation is regarded as a multiplication of low frequency (capacity variation of coil) and the frequency of object (true image). The efficiency of the proposed method is illustrated with the aid of both phantom and physical images. The impact of the inhomogeneity correction on brain tissue segmentation is studied in detail. The results show significant improvement of the tissue segmentation after inhomogeneity correction.
authors.affiliation: Laboratoire Radiologie Expérimentale, Faculté de medecine Lariboisière-Saint-Louis, 10 avenue de Verdun, 75010, Paris, France.
authors.forename: L Q
authors.initials: LQ
authors.lastname: Zhou
authors.forename: Y M
authors.initials: YM
authors.lastname: Zhu
authors.forename: C
authors.initials: C
authors.lastname: Bergot
authors.forename: A M
authors.initials: AM
authors.lastname: Laval-Jeantet
authors.forename: V
authors.initials: V
authors.lastname: Bousson
authors.forename: J D
authors.initials: JD
authors.lastname: Laredo
authors.forename: M
authors.initials: M
authors.lastname: Laval-Jeantet
mesh_terms: D001921:Brain / Q000033:anatomy & histology*; D006801:Humans; D008279:Magnetic Resonance Imaging / Q000379:methods*; D019047:Phantoms, Imaging; D011846:Radio Waves; D011856:Radiographic Image Enhancement