A rotating PET scanner using BGO block detectors: design, performance and applications.
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.
Townsend
D W
DW
Division of Nuclear Medicine, University Hospital, Geneva, Switzerland.
Wensveen
M
M
Byars
L G
LG
Geissbuhler
A
A
Tochon-Danguy
H J
HJ
Christin
A
A
Defrise
M
M
Bailey
D L
DL
Grootoonk
S
S
Donath
A
A
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*
D005857:Germanium; C042364:bismuth germanium oxide; D001729:Bismuth