A positron tomograph with 600 BGO crystals and 2. 6 mm resolution

Conference · Mon Feb 01 04:00:00 EST 1988 · IEEE Trans. Nucl. Sci.; (United States)

OSTI ID:7029230

Derenzo, S E; Huesman, R H; Cahoon, J L; Geyer, A B; Moses, W W; Uber, D C; Vuletich, T; Budinger, T F

The authors describe the imaging performance of the Donner 600-Crystal Positron Tomograph, a single 60 cm diam ring of 3 mm wide bismuth germanate (BGO) crystals coupled individually to 14 mm phototubes. With a pulse height threshold of 200 keV and a slice thickness of 5 mm, the sensitivity is 7024 events/sec per ..mu..Ci/ml in a 20 cm cylinder of water. The measured rates for 18 ..mu..Ci/ml are 95,000 trues/sec plus 20,000 random/sec. A 0.3 mm diam /sup 22/Na line source near the center of the tomograph has a circular point spread function (PSF) with a full-width at half-maximum (fwhm) of 2.6 mm. At 5 cm from the center the PSF is elliptical with a fwhm of 2.7 mm tangential x 3.2 mm radial. At 10 cm the PSF has a fwhm of 2.8 mm tangential x 4.8 mm radial. Attenuation data are accumulated with a 20 mCi /sup 68/Ge orbiting transmission source and 100 million coincident events are collected in 200 sec.

• Research Organization: Donner Lab. and Lawrence Berkeley Lab., Univ. of California, Berkeley, CA (US)
• OSTI ID: 7029230
• Report Number(s): CONF-871006-
• Conference Information: Journal Name: IEEE Trans. Nucl. Sci.; (United States) Journal Volume: 35:1
• Country of Publication: United States
• Language: English

Related Subjects

07 ISOTOPE AND RADIATION SOURCES
43 PARTICLE ACCELERATORS
430200* -- Particle Accelerators-- Beam Dynamics
Field Calculations
& Ion Optics
440101 -- Radiation Instrumentation-- General Detectors or Monitors & Radiometric Instruments
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
655002 -- Medical Physics-- Radiation Source Calibration & Standardization
ATTENUATION
BETA DECAY RADIOISOTOPES
BGO DETECTORS
BISMUTH COMPOUNDS
BISMUTH GERMANATES
COMPUTERIZED TOMOGRAPHY
CRYSTAL COUNTERS
DATA ANALYSIS
DAYS LIVING RADIOISOTOPES
DIAGNOSTIC TECHNIQUES
ELECTRON CAPTURE RADIOISOTOPES
EMISSION COMPUTED TOMOGRAPHY
EVEN-EVEN NUCLEI
GERMANATES
GERMANIUM 68
GERMANIUM COMPOUNDS
GERMANIUM ISOTOPES
HYDROGEN COMPOUNDS
IMAGE PROCESSING
IMAGE SCANNERS
INTERMEDIATE MASS NUCLEI
ISOTOPES
MEASURING INSTRUMENTS
MOLECULAR ORBITAL METHOD
NUCLEI
OXYGEN COMPOUNDS
PERFORMANCE TESTING
PHOTOTUBES
POSITRON COMPUTED TOMOGRAPHY
PROCESSING
RADIATION DETECTORS
RADIATION SOURCES
RADIOISOTOPES
SCINTILLATION COUNTERS
SOLID SCINTILLATION DETECTORS
TESTING
TOMOGRAPHY
WATER