title: A rotating PET scanner using BGO block detectors: design, performance and applications.
abstract: Recent advances in fully three-dimensional reconstruction for multi-ring PET scanners have led us to explore the potential of a prototype scanner based on the rotation of two opposing arrays of BGO block detectors. The prototype contains only one-third of the number of detectors in the equivalent full ring scanner, resulting in reduced cost. With a lower energy threshold at 250 keV, the absolute efficiency of the scanner is 0.5% and the scatter fraction is 35% for a 20-cm cylinder. Transaxial and axial spatial resolution is about 6 mm. The maximum noise equivalent count rate estimated for a 15-cm diameter cylinder is 36,000 cps at a concentration of 26 kBq/ml. The minimum scan time for a 18F-fluoro-2-deoxyglucose (FDG) brain study is 55 sec. The camera has been validated for clinical applications using both FDG and 82Rb.
authors.affiliation: Division of Nuclear Medicine, University Hospital, Geneva, Switzerland.
authors.forename: D W
authors.initials: DW
authors.lastname: Townsend
authors.forename: M
authors.initials: M
authors.lastname: Wensveen
authors.forename: L G
authors.initials: LG
authors.lastname: Byars
authors.forename: A
authors.initials: A
authors.lastname: Geissbuhler
authors.forename: H J
authors.initials: HJ
authors.lastname: Tochon-Danguy
authors.forename: A
authors.initials: A
authors.lastname: Christin
authors.forename: M
authors.initials: M
authors.lastname: Defrise
authors.forename: D L
authors.initials: DL
authors.lastname: Bailey
authors.forename: S
authors.initials: S
authors.lastname: Grootoonk
authors.forename: A
authors.initials: A
authors.lastname: Donath
mesh_terms: D000465:Algorithms; D001729:Bismuth; D004867:Equipment Design; D015902:Gamma Cameras; D005857:Germanium; D006801:Humans; D007091:Image Processing, Computer-Assisted; D013679:Technology, Radiologic; D014055:Tomography, Emission-Computed / Q000295:instrumentation*
chemical_list: D005857:Germanium; C042364:bismuth germanium oxide; D001729:Bismuth