A 5 inch diameter position-sensitive scintillation counter

Recent developments in photomultiplier technology have enabled the construction of 5-in-diameter position-sensitive scintillation counters. A 5-in-diameter hard X-ray imager has been built and a position resolution of 4.0 mm full width half maximum (FWHM) has been obtained at 122 keV using a standar...

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Bibliographic Details
Published in:IEEE Transactions on Nuclear Science (Institute of Electrical and Electronics Engineers); (United States) 1993-08, Vol.40 (4), p.447-451
Main Authors: He, Z., Bird, A.J., Ramsden, D., Meng, Y.
Format: Article
Language:English
Subjects:
440101 > Radiation Instrumentation-- General Detectors or Monitors & Radiometric Instruments
Biomedical imaging
BIOMEDICAL RADIOGRAPHY
BODY
DESIGN
DETECTION
DIAGNOSTIC TECHNIQUES
ENDOCRINE GLANDS
Exact sciences and technology
Experimental methods and instrumentation for elementary-particle and nuclear physics
GLANDS
INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
MEASURING INSTRUMENTS
MEDICINE
NAI DETECTORS
NUCLEAR MEDICINE
Nuclear physics
Optical imaging
ORGANS
PHOTOMULTIPLIERS
Photonic crystals
PHOTOTUBES
Physics
POSITION SENSITIVE DETECTORS
Position sensitive particle detectors
RADIATION DETECTION
RADIATION DETECTORS
Radiation detectors, dosimeters
RADIOLOGY
RADIOLOGY AND NUCLEAR MEDICINE
RESOLUTION
SCINTILLATION COUNTERS
Scintillation detectors
Sensor arrays
Solid scintillation detectors
SOLID SCINTILLATION DETECTORS 550602 > Medicine-- External Radiation in Diagnostics-- (1980-)
SPATIAL RESOLUTION
THYROID
X-RAY DETECTION
X-ray imaging
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Summary:Recent developments in photomultiplier technology have enabled the construction of 5-in-diameter position-sensitive scintillation counters. A 5-in-diameter hard X-ray imager has been built and a position resolution of 4.0 mm full width half maximum (FWHM) has been obtained at 122 keV using a standard 3-mm-thick, 125-mm-diameter NaI(Tl) crystal with a 100-mm-diameter exit window. The spatial resolution can be improved by making some simple changes in the crystal design. The results show that the light output and spatial resolution vary considerably over the surface of such a detector. In order to make the best use of the imaging capability of these tubes, individual photon events must be corrected both in energy and position. The results of a 300-point detailed survey of the characteristics of the position-sensitive detector demonstrate its overall performance. A thyroid phantom image was obtained using this imager.< >
ISSN:0018-9499
1558-1578
DOI:10.1109/23.256598