title: Brain SPECT Simulation Using Half-Cone-Beam Collimation and Single-Revolution Helical-Path Acquisition.
abstract: In this study related to human brain SPECT imaging, simulation of half-cone-beam collimation and helical-path data acquisition is performed. We discuss problems related to circular-orbit acquisition using cone-beam collimation, such as shoulder interference resulting in object truncation, and insufficient sampling of the object resulting in axial distortions in the reconstructed images. We demonstrate that a triple-camera SPECT system with half-cone-beam collimation and single-revolution helical-path acquisition eliminates both issues and offers substantially improved sampling and almost artifact-free reconstruction of the object.
authors.affiliation: Department of Radiology, Duke University Medical Center, Durham, NC 27710 USA (e-mail: ruben@dec3.duhs.duke.edu ).
authors.forename: Ruben
authors.initials: R
authors.lastname: Ter-Antonyan
authors.forename: Ronald J
authors.initials: RJ
authors.lastname: Jaszczak
authors.forename: James E
authors.initials: JE
authors.lastname: Bowsher
authors.forename: Kim L
authors.initials: KL
authors.lastname: Greer
authors.forename: Scott D
authors.initials: SD
authors.lastname: Metzler