Development of small-diameter lead-glass-tube matrices for gamma-ray conversion in positron emission tomography
A gamma-ray converter for a multiwire proportional chamber (MWPC) positron emission tomograph is described. The converter is made of small-diameter (0.48 mm inner diameter, 0.06 mm wall thickness) lead-oxide-glass tubes fused to form a honeycomb matrix. The surfaces of the tubes are reduced in a hydrogen atmosphere to provide the drift electric field for detection of the conversion electrons. The detection efficiency for a 10 mm thick converter is 6.65%, with a time resolution of 160 ns (FWHM). A scheme which will improve the spatial resolution of the tomograph by use of the self quenching streamer mode of chamber operation is described. Details of construction of the converters and the MWPC are presented, as well as the design performance of a high spatial resolution positron emission tomograph (HISPET). 40 refs., 22 figs.
- Research Organization:
- Lawrence Berkeley Lab., CA (USA)
- DOE Contract Number:
- AC03-76SF00098
- OSTI ID:
- 5680472
- Report Number(s):
- LBL-19663; ON: DE85013817
- Country of Publication:
- United States
- Language:
- English
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550601* -- Medicine-- Unsealed Radionuclides in Diagnostics
62 RADIOLOGY AND NUCLEAR MEDICINE
COMPUTERIZED TOMOGRAPHY
CONSTRUCTION
DATA
DESIGN
DIAGNOSTIC TECHNIQUES
DRIFT CHAMBERS
EMISSION COMPUTED TOMOGRAPHY
EXPERIMENTAL DATA
GLASS
IMAGE CONVERTERS
IMAGE TUBES
INFORMATION
MEASURING INSTRUMENTS
MULTIWIRE PROPORTIONAL CHAMBERS
NUMERICAL DATA
PERFORMANCE TESTING
POSITRON COMPUTED TOMOGRAPHY
PROPORTIONAL COUNTERS
RADIATION DETECTORS
RESOLUTION
SPATIAL RESOLUTION
TESTING
TOMOGRAPHY
62 RADIOLOGY AND NUCLEAR MEDICINE
COMPUTERIZED TOMOGRAPHY
CONSTRUCTION
DATA
DESIGN
DIAGNOSTIC TECHNIQUES
DRIFT CHAMBERS
EMISSION COMPUTED TOMOGRAPHY
EXPERIMENTAL DATA
GLASS
IMAGE CONVERTERS
IMAGE TUBES
INFORMATION
MEASURING INSTRUMENTS
MULTIWIRE PROPORTIONAL CHAMBERS
NUMERICAL DATA
PERFORMANCE TESTING
POSITRON COMPUTED TOMOGRAPHY
PROPORTIONAL COUNTERS
RADIATION DETECTORS
RESOLUTION
SPATIAL RESOLUTION
TESTING
TOMOGRAPHY