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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Veröffentlicht in:	IEEE Transactions on Nuclear Science (Institute of Electrical and Electronics Engineers); (United States) 1993-08, Vol.40 (4), p.447-451
Hauptverfasser:	He, Z., Bird, A.J., Ramsden, D., Meng, Y.
Format:	Artikel
Sprache:	eng
Schlagworte:	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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Beschreibung
Zusammenfassung:	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