High resolution computed tomography of positron emitters
Conference
·
· IEEE Trans. Nucl. Sci.; (United States)
OSTI ID:7213112
High resolution computed transaxial tomography has been performed on phantoms containing positron-emitting isotopes. The imaging system consisted of two opposing groups of eight NaI(Tl) crystals 8 mm x 30 mm x 50 mm deep and the phantoms were rotated to measure coincident events along 8960 projection integrals as they would be measured by a 280 crystal ring system now under construction. The spatial resolution in the reconstructed images is 7.5 mm FWHM at the center of the ring and approximately 11 mm FWHM at a radius of 10 cm. Measurements of imaging and background rates under various operating conditions are presented. Based on these measurements, the full 280 crystal system will image 10,000 events per sec with 400 ..mu..Ci in a section 1 cm thick and 20 cm in diameter. It is shown that 1.5 million events are sufficient to reliably image 3.5 mm hot spots with 14 mm center-to-center spacing and isolated 9 mm diameter cold spots in phantoms 15-20 cm in diameter.
- Research Organization:
- Univ. of California, Berkeley
- OSTI ID:
- 7213112
- Conference Information:
- Journal Name: IEEE Trans. Nucl. Sci.; (United States) Journal Volume: NS-24:1
- Country of Publication:
- United States
- Language:
- English
Similar Records
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Conference
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Journal Article
·
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· J. Nucl. Med., v. 16, no. 12, pp. 1166-1173
·
OSTI ID:4129908
Related Subjects
440101* -- Radiation Instrumentation-- General Detectors or Monitors & Radiometric Instruments
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
550601 -- Medicine-- Unsealed Radionuclides in Diagnostics
62 RADIOLOGY AND NUCLEAR MEDICINE
CAMERAS
COINCIDENCE METHODS
COUNTING TECHNIQUES
DESIGN
FILTERS
GAMMA CAMERAS
MEASURING INSTRUMENTS
MOCKUP
OPERATION
PARTICLE SOURCES
PERFORMANCE
PHANTOMS
POSITRON CAMERAS
POSITRON SOURCES
RADIATION DETECTORS
RADIATION SOURCES
RESOLUTION
SCINTILLATION COUNTERS
SOLID SCINTILLATION DETECTORS
SPATIAL RESOLUTION
STRUCTURAL MODELS
TOMOGRAPHY
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
550601 -- Medicine-- Unsealed Radionuclides in Diagnostics
62 RADIOLOGY AND NUCLEAR MEDICINE
CAMERAS
COINCIDENCE METHODS
COUNTING TECHNIQUES
DESIGN
FILTERS
GAMMA CAMERAS
MEASURING INSTRUMENTS
MOCKUP
OPERATION
PARTICLE SOURCES
PERFORMANCE
PHANTOMS
POSITRON CAMERAS
POSITRON SOURCES
RADIATION DETECTORS
RADIATION SOURCES
RESOLUTION
SCINTILLATION COUNTERS
SOLID SCINTILLATION DETECTORS
SPATIAL RESOLUTION
STRUCTURAL MODELS
TOMOGRAPHY