No abstract available
Source
International Atomic Energy Agency, Vienna (Austria); World Health Organization, Geneva (Switzerland); Proceedings series; 635 p; ISBN 92-0-010081-3; 
; 1981; v. 1 p. 147-148; IAEA; Vienna; International symposium on medical radionuclide imaging; Heidelberg, Germany, F.R; 1 - 5 Sep 1980; IAEA-SM--247/40; Published in summary form only.
; 1981; v. 1 p. 147-148; IAEA; Vienna; International symposium on medical radionuclide imaging; Heidelberg, Germany, F.R; 1 - 5 Sep 1980; IAEA-SM--247/40; Published in summary form only.
[en] Two problems in the γ-γ-coincidence method for depth discrimination in scintigraphy are discussed. Firstly, the FW(1/e)M of the distribution function of time differences between 'coincident' pulses has been calculated to be the optimum resolving time for measurement of true coincidences. Secondly, the improvement of time resolution of such an apparatus by substituting a large volume NaI(Tl) crystal by an array of many small ones has been analysed. It was shown that such arrays have no practical advantage since the loss in efficiency is of the same order of magnitude as the gain in time resolution. (author)
Journal
Physics in Medicine and Biology; ISSN 0031-9155; ; v. 24(3); p. 571-576
; v. 24(3); p. 571-576
[en] Xe-133 is inhaled in a concentration of 2 μCi per ml oxygen for 1 minute. Usually the patient is in a sitting position. The arterial influx of Xe and the renal concentrations to the left and to the right are measured indirectly using external scintillation detectors, a 15 minutes follow up is needed. The kidney collimators were optimized for counting efficiency. Localization of detectors above the kidneys is done by injection of 10 μCi of I-131-hippuran, half an hour before the inhalation of Xe starts. A model of 3 compartments is accepted for the interpretation of the kidney curves. The fastest component represents the cortical flow. For analysis a computer program is used. A clinical example is presented: a case of nephroptosis
Source
Raynaud, C. (ed.); 1141 p; ISBN 0-08-027-090-5; ; 1982; v. 2 p. 1571-1574; Pergamon; Paris (France); 3. World congress on nuclear medicine and biology; Paris (France); 29 Aug - 2 Sep 1982
; 1982; v. 2 p. 1571-1574; Pergamon; Paris (France); 3. World congress on nuclear medicine and biology; Paris (France); 29 Aug - 2 Sep 1982
No abstract available
Source
Schmidt, H.A.E. (Evangelisches Krankenhaus Bethesda Gemeinnuetzige G.m.b.H., Duisburg (Germany, F.R.). Nuklearmedizinische Klinik und Poliklinik); Adam, W.E. (Ulm Univ. (Germany, F.R.). Abt. Radiologie 3); Nuklearmedizin. Supplementum; no. 20; 1080 p; ISBN 3-7945-0964-1; ; 1984; p. 542-545; Schattauer; Stuttgart (Germany, F.R.); 21. international annual meeting of the Society of Nuclear Medicine - Europa; Ulm (Germany, F.R.); 13-16 Sep 1983; Published in summary form only.
; 1984; p. 542-545; Schattauer; Stuttgart (Germany, F.R.); 21. international annual meeting of the Society of Nuclear Medicine - Europa; Ulm (Germany, F.R.); 13-16 Sep 1983; Published in summary form only.