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Open Access Gold as soon as Publ. Version/Full Text is submitted to ZB.
A detector of adjustable response for the study of lung clearance.
Health Phys. 32, 243-251 (1977)
A system of four 5phix5 in. cylindrical NaI (TI) is required for the study of regional deposition and lung clearance of inhaled γ emitting aerosol contaminants. Each of the four detectors is coupled to a collimation system of rectangular opening to achieve uniformity in response across the lung volume. The uniformity in response can be adjusted to any equired degree for the different γ ray energies by displacement of the detectors relative to the fixed collimation system. The parameters of the system are optimized by a computational study based on the theoretical evaluation of detection efficiency and response. The measured response of the system for a 137Cs point source at different positions of the assumed lung model is presented. The detection limits of the system with lead collimators of 4 cm wall thickness range from 6 to 17 nCi depending on photon energy and can be improved by additional shielding.
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Publication type
Article: Journal article
Document type
Scientific Article
ISSN (print) / ISBN
0017-9078
e-ISSN
1538-5159
Journal
Health Physics
Quellenangaben
Volume: 32,
Issue: 4,
Pages: 243-251
Publisher
Lippincott Williams & Wilkins
Reviewing status
Peer reviewed
Institute(s)
Abteilung Biophysikalische Strahlenforschung