Compton scatter compensation using the triple-energy window method for single- and dual-isotope SPECT.
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.
Ichihara
T
T
Toshiba Nasu Works, Nuclear Medicine Systems Engineering Department, Tochigi-ken, Japan.
Ogawa
K
K
Motomura
N
N
Kubo
A
A
Hashimoto
S
S
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*
D009943:Organophosphorus Compounds; D015609:Organotechnetium Compounds; C078700:technetium tc-99m tetrofosmin