title: Compton scatter compensation using the triple-energy window method for single- and dual-isotope SPECT.
abstract: The spatial distribution of scattered photons varies depending on many factors such as object size and source distribution. We propose a triple-energy window (TEW) scatter compensation method for determining position-dependent Compton scatter. We estimated the count of primary photons at each pixel in the acquired image using the 24% main window centered at the photo peak energy and 3 keV scatter rejection windows on both sides of the main window. We conducted a physical evaluation of this method using phantoms and also applied this method to patients in a clinical trial. The TEW method performed Compton scatter compensation with good accuracy.
authors.affiliation: Toshiba Nasu Works, Nuclear Medicine Systems Engineering Department, Tochigi-ken, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Ichihara
authors.forename: K
authors.initials: K
authors.lastname: Ogawa
authors.forename: N
authors.initials: N
authors.lastname: Motomura
authors.forename: A
authors.initials: A
authors.lastname: Kubo
authors.forename: S
authors.initials: S
authors.lastname: Hashimoto
mesh_terms: D015902:Gamma Cameras; D006321:Heart / Q000000981:diagnostic imaging; D006801:Humans; D009943:Organophosphorus Compounds; D015609:Organotechnetium Compounds; D017785:Photons; D015899:Tomography, Emission-Computed, Single-Photon / Q000379:methods*
chemical_list: D009943:Organophosphorus Compounds; D015609:Organotechnetium Compounds; C078700:technetium tc-99m tetrofosmin