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  • 1995-1999  (3)
  • Atomic, Molecular and Optical Physics  (1)
  • Doppler- und Duplexsonographie  (1)
  • Dynamic contrast-enhanced imaging  (1)
Material
Years
Year
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Der Radiologe 38 (1998), S. 578-585 
    ISSN: 1432-2102
    Keywords: Schlüsselwörter Phlebographie ; Doppler- und Duplexsonographie ; Extremitätenvenen ; Qualitätssicherung ; Key words Phlebography ; Duplex-ultrasound ; Extremity veins ; Quality standards
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary By interdisciplinary cooperation with the German Societies for Angiology, Phlebology and Vascular Surgery, recommendations have been worked out which address the indication of phlebography of the veins of the extremities and which define the quality standards of phlebographic techniques. The specific clinical questions in varicose syndrome, acute thrombosis and postthrombotic syndrome have to be answered by employing adequate phlebographic technique, documentation, and description of relevant morphologic and functional findings.
    Notes: Zusammenfassung In Zusammenarbeit mit den Fachgesellschaften Deutsche Gesellschaft für Angiologie, Deutsche Gesellschaft für Phlebologie und Deutsche Gesellschaft für Gefäßchirurgie wurden Empfehlungen zur Indikationsstellung, Untersuchungstechnik und Qualitätssicherung der Extremitätenphlebographie erstellt. Für die speziellen klinischen Fragestellungen beim Varikosesyndrom, bei der akuten Phlebothrombose und beim Postthrombotischen Syndrom werden die Qualitätsmerkmale für die Dokumentation und Befundung nach morphologischen und funktionellen Gesichtspunkten tabellarisch zusammengefaßt.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1432-1920
    Keywords: Key words Magnetic resonance imaging ; Perfusion studies ; Dynamic contrast-enhanced imaging ; Cerebral blood volume ; Brain infarcts
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract MRI perfusion studies have focussed mainly on acute ischaemia and characterisation in ischaemia. Our purpose was to analyse regional brain haemodynamic information in acute, subacute, and chronic ischaemia. We performed 16 examinations of 11 patients on a 1.5 T MR images. Conventional and dynamic contrast-enhanced imaging were employed in all examinations. For the dynamic susceptibility sequences, a bolus (0.2 mmol/kg) of gadopentetate dimeglumine was injected. Reconstructed regional relative cerebral blood volume (rCBV) maps, bolus maps, and conventional images were analysed by consensus reading. In all examinations decreases in rCBV were observed in the lesions. The distribution of regional rCBV in lesions was heterogeneous. The rCBV of the periphery of the lesions was higher than that at their center. There was a correlation between the time since onset and abnormalities on the rCBV map and T2-weighted images (T2WI). In the early stage of acute stroke, the abnormalities tended to be larger on the rCBV than on T2WI. Many patterns of bolus passage were observed in ischaemic regions. rCBV maps provide additional haemodynamic information in patients with brain infarcts.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 0020-7608
    Keywords: Computational Chemistry and Molecular Modeling ; Atomic, Molecular and Optical Physics
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: An investigation of the influence of various gradient-corrected exchange and correlation functionals on the bond lengths and dipole moments of CO and N2O has been carried out using density functional theory. It is shown that whereas some functionals are found to be more sensitive to the basis set quality than are others, the more commonly used gradient-corrected functionals lead to properties in very good agreement with experiment provided that a sufficiently large basis set is employed. © 1995 John Wiley & Sons, Inc.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
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