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  • 1
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: We describe an improvement of the neutron activation system in operation on the Frascati Tokamak Upgrade (FTU) tokamak for the measurement of the total neutron yield. A HPGe well-type detector (200 cm3 active volume) is used to detect the photoemission from neutron activated samples (115mIn 336.2 keV γ rays from DD neutrons on indium for FTU). Due to their high geometrical efficiency, HPGe well-type detectors are particularly suited to the FTU low-level activity measurements. A particular effort has been devoted to the calibration of the measuring system. In particular, a multi-γ calibration source (59–1332 keV energy range) with a density of 7.31 g/cm3 consisting of a stack of indium foils has been prepared. This assures that the shape and volume of the calibration source are the same as those of the samples used in the actual measurements. The full-energy-peak efficiency at the 115mIn 336.2 keV line is 0.197 with an overall uncertainty of 2% (1σ). For a better characterization of the detector response as a function of the sample density, a further calibration source with the same geometry has been prepared in a gel aqueous solution (density ∼1 g/cm3). The calibration curves for the well-type detector at the two different density values are compared. © 1997 American Institute of Physics.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Journal of Economic Dynamics and Control 16 (1992), S. 93-108 
    ISSN: 0165-1889
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Economics
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Talanta 21 (1974), S. 601-603 
    ISSN: 0039-9140
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Neurological sciences 14 (1993), S. 61-67 
    ISSN: 1590-3478
    Keywords: Neuro-Behçet ; nuclear magnetic resonance (NMR) ; immunosuppressive and steroid therapy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Sommario Questo lavoro mette in risalto il ruolo fondamentale della RMN nella diagnosi delle complicanze neurologiche della malattia di Behcet. Gli autori presentano quattro casi clinici esaminati tra il 1990 e il 1991. In tutti i casi la terapia sembra aver migliorato la prognosi dei pazienti.
    Notes: Abstract This paper highlights the fundamental role of MRI in the diagnosis of Neuro-Behçet disease. We present 4 cases examined between 1990 and 1991. Treatment in all the cases seems to have improved the patients' prognoses.
    Type of Medium: Electronic Resource
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  • 5
    ISSN: 1590-3478
    Keywords: Magnetic Resonance Imaging ; streptokinase ; occlusion
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Sommario Una donna di 77 anni fu ricoverata a distanza di un'ora dall'insorgenza di emiplegia destra con afasia. Una Risonanza Magnetica dell'encefalo risultò negativa, mentre una Angio-RM indicava l'occlusione dell'arteria cerebrale media di sinistra; fu quindi intrapresa la terapia con streptokinasi. Dopo due ore dall'infusione, le capacità motorie della paziente migliorano sensibilmente. Una Angio-RM effettuata sei ore più tardi evidenziò la parziale ricanalizzazione del vaso occluso. Questo caso dimostra la potenziale utilità del monitoraggio con Angio-RM nel corso della terapia trombolitica.
    Notes: Abstract A 77 year old woman was hospitalized one hour after the onset of right hemiplegia and aphasia. Magnetic resonance imaging (MRI) examination was negative and MRA indicated occlusion of the left middle cerebral artery. Treatment with streptokinase was instituted (a 60 minute intravenous infusion of 1.5 MU of streptokinase in 100 ml of saline solution). Two hours after infusion, the patient's motor function clearly improved. An MRA examination performed six hours later showed partial recanalization of the obstructed vessel. Our report demonstrates the potential usefulness of MRA monitoring during thrombolytic therapy.
    Type of Medium: Electronic Resource
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