title: Functional Biomedical Images of Alzheimer's Disease. A Green's Function-based Empirical Mode Decomposition Study.
abstract: Positron emission tomography (PET) provides a functional imaging modality to detect signs of dementias in human brains. Two-dimensional empirical mode decomposition (2D-EMD) provides means to analyze such images. It decomposes the latter into characteristic modes which represent textures on different spatial scales. These textures provide informative features for subsequent classification purposes. The study proposes a new EMD variant which relies on a Green's function based estimation method including a tension parameter to fast and reliably estimate the envelope hypersurfaces interpolating extremal points of the two-dimensional intensity distrubution of the images. The new method represents a fast and stable bi-dimensional EMD which speeds up computations roughly 100-fold. In combination with proper classifiers these exploratory feature extraction techniques can form a computer aided diagnosis (CAD) system to assist clinicians in identifying various diseases from functional images alone. PET images of subjects suffering from Alzheimer's disease are taken to illustrate this ability.
authors.forename: S
authors.initials: S
authors.lastname: Al-Baddai
authors.forename: A
authors.initials: A
authors.lastname: Neubauer
authors.forename: A M
authors.initials: AM
authors.lastname: Tomé
authors.forename: V
authors.initials: V
authors.lastname: Vigneron
authors.forename: D
authors.initials: D
authors.lastname: Salas-Gonzalez
authors.forename: J M
authors.initials: JM
authors.lastname: Górriz
authors.forename: C G
authors.initials: CG
authors.lastname: Puntonet
authors.affiliation: CIML, Biophysics, University of Regensburg, D-93040 Regensburg, Germany. elmar.lang@ur.de.
authors.forename: E W
authors.initials: EW
authors.lastname: Lang
mesh_terms: D000544:Alzheimer Disease / Q000000981:diagnostic imaging* / Q000503:physiopathology*; D001921:Brain / Q000000981:diagnostic imaging* / Q000503:physiopathology*; D001931:Brain Mapping / Q000379:methods*; D060825:Cognitive Dysfunction / Q000000981:diagnostic imaging / Q000503:physiopathology; D019788:Fluorodeoxyglucose F18; D006801:Humans; D017711:Nonlinear Dynamics; D049268:Positron-Emission Tomography / Q000379:methods*; D019275:Radiopharmaceuticals; D060388:Support Vector Machine
chemical_list: D019275:Radiopharmaceuticals; D019788:Fluorodeoxyglucose F18