title: Classification of LV wall motion in cardiac MRI using kernel Dictionary Learning with a parametric approach.
abstract: In this paper, we propose a parametric approach for the assessment of wall motion in Left Ventricle (LV) function in cardiac cine-Magnetic Resonance Imaging (MRI). Time-signal intensity curves (TSICs) are identified in Spatio-temporal image profiles extracted from different anatomical segments in a cardiac MRI sequence. Different parameters are constructed from specific TSICs that present a decreasing then increasing shape reflecting dynamic information of the LV contraction. The parameters extracted from these curves are related to: 1) an average curve based on a clustering process, 2) curve skewness and 3) cross correlation values between each average clustered curve and a patient-specific reference. Several tests are performed in order to construct different vectors to train a sparse classifier based on kernel Dictionary Learning (DL). Results are compared with other classifiers like Support Vector Machine (SVM) and Discriminative Dictionary Learning. The best classification performance is obtained with information of skewness and the average curve with an accuracy about 94% using the mentioned sparse based kernel DL with a radial basis function kernel.
authors.forename: Juan
authors.initials: J
authors.lastname: Mantilla
authors.forename: Jose
authors.initials: J
authors.lastname: Paredes
authors.forename: Jean-J
authors.initials: JJ
authors.lastname: Bellanger
authors.forename: Erwan
authors.initials: E
authors.lastname: Donal
authors.forename: Christophe
authors.initials: C
authors.lastname: Leclercq
authors.forename: Ruben
authors.initials: R
authors.lastname: Medina
authors.forename: Mireille
authors.initials: M
authors.lastname: Garreau
mesh_terms: D000465:Algorithms; D016022:Case-Control Studies; D016000:Cluster Analysis; D006321:Heart / Q000503:physiopathology*; D006352:Heart Ventricles / Q000503:physiopathology*; D006801:Humans; D008279:Magnetic Resonance Imaging / Q000379:methods*; D012815:Signal Processing, Computer-Assisted; D060388:Support Vector Machine; D013997:Time Factors