title: Emission CT Image Reconstruction Using the Augmented Lagrangian Method with a Modified Form of Nonnegativity Constraints.
abstract: The augmented Lagrangian method was applied to emission CT image reconstruction to attain the satisfactory elimination of negative pixels using a modified form of the original nonnegativity constraints. A penalty function was included in the augmented Lagrangian method to suppress image noise due to statistical noise in the projection data. A slight change in the original constraint form achieved almost complete nonnegativity without loss in the closeness of reconstruction to the original image.
authors.affiliation: Department of Computer Science, Kitami Institute of Technology. suzuki@cs.kitami-it.ac.jp
authors.forename: Shigehito
authors.initials: S
authors.lastname: Suzuki
authors.forename: Kazuhiro
authors.initials: K
authors.lastname: Koshino
authors.forename: Yohei
authors.initials: Y
authors.lastname: Goto
authors.forename: Kazunari
authors.initials: K
authors.lastname: Morita