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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Graefe's archive for clinical and experimental ophthalmology 211 (1979), S. 187-203 
    ISSN: 1435-702X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Es wird ein nuklearmedizinisches Verfahren zum nicht-invasiven Nachweis intraokularer Veränderungen vorgestellt. Eine Gamma Szintillations-Kamera mit nachgeschalteter Meßdatenverarbeitung dient als Untersuchungsinstrument. Ein Doppel Lochblenden-Kollimator entwirft für jedes Auge getrennt ein vergrößertes Abbild der Radioaktivitätsverteilung auf dem Detektor-Kristall der Kamera. Dieser Sonderkollimator wurde speziell für nuklearmedizinische Untersuchungen der Augen entworfen. Konstruktive Einzelheiten werden geschildert und die wesentlichen Abbildungsparameter des Gerätes — Auflösung und Ausbeute — anhand von Phantomversuchen erläutert.
    Notes: Abstract A gamma scintillation camera is used for noncontact detection of intraocular mass lesions. A double aperture pinhole collimator was designed for this special application. The collimator projects a magnified image of the radioactivity present in each, eye onto the detector crystal of the camera. Details of the collimator design are described. The image-making properties of a double aperture pinhole collimator for ocular, scintigraphy in regard to resolution and response were studied and demonstrated by phantom experiments. So far we have studied 50 cases with this new nuclear medicine procedure, using mainly technetium-pertechnetate as the radioindicator. Case histories and records of some typical results are presented. Better designed radiopharmaceuticals with appropriate tumor-seeking properties should be developed. Labeled melanin precursors are promising for detection of these lesions.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Neuroradiology 16 (1978), S. 322-323 
    ISSN: 1432-1920
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Within a test of interobserver variability 88 CCT images were described by four physicians. In spite of a standardized documentation method, first results demonstrate that continuous quality control is necessary if the data is gathered into CCT data bases. The evaluation of uncontrolled data seems to be limited.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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