High resolution computed tomography of positron emitters. [Phantom testing of circular ring of NaI(Tl) crystal detectors]
Conference
·
OSTI ID:7330241
High resolution computed transaxial radionuclide 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. We present measurements of imaging and background rates under various operating conditions. 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. We show 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 to 20 cm in diameter.
- Research Organization:
- California Univ., Berkeley (USA). Lawrence Berkeley Lab.
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 7330241
- Report Number(s):
- LBL-4797; CONF-761006-28
- Country of Publication:
- United States
- Language:
- English
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Mon Jan 31 23:00:00 EST 1977
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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
COMPUTER CALCULATIONS
DATA PROCESSING
DESIGN
DIAGNOSTIC TECHNIQUES
DISTRIBUTION
GAMMA CAMERAS
IMAGES
MEASURING INSTRUMENTS
MEDICINE
MOCKUP
NUCLEAR MEDICINE
PARTICLE SOURCES
PHANTOMS
POSITRON CAMERAS
POSITRON SOURCES
PROCESSING
RADIATION DETECTORS
RADIATION SOURCES
RADIOISOTOPE SCANNERS
RADIONUCLIDE ADMINISTRATION
SCINTILLATION COUNTERS
STRUCTURAL MODELS
TESTING
TISSUE DISTRIBUTION
TOMOGRAPHY
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
550601* -- Medicine-- Unsealed Radionuclides in Diagnostics
62 RADIOLOGY AND NUCLEAR MEDICINE
CAMERAS
COMPUTER CALCULATIONS
DATA PROCESSING
DESIGN
DIAGNOSTIC TECHNIQUES
DISTRIBUTION
GAMMA CAMERAS
IMAGES
MEASURING INSTRUMENTS
MEDICINE
MOCKUP
NUCLEAR MEDICINE
PARTICLE SOURCES
PHANTOMS
POSITRON CAMERAS
POSITRON SOURCES
PROCESSING
RADIATION DETECTORS
RADIATION SOURCES
RADIOISOTOPE SCANNERS
RADIONUCLIDE ADMINISTRATION
SCINTILLATION COUNTERS
STRUCTURAL MODELS
TESTING
TISSUE DISTRIBUTION
TOMOGRAPHY