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  • 1985-1989  (3)
  • 32.30.Rj  (1)
  • ISFET  (1)
  • Magnetic resonance (MR) imaging  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Magnetic resonance imaging of cerebral infarction: Time course of Gd-DTPA enhancement and CT comparison (1988)
    Springer
    Neuroradiology 30 (1988), S. 372-378 
    Details
    ISSN: 1432-1920
    Keywords: Magnetic resonance (MR) imaging ; Gd-DTPA ; Brain infarction
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Thirty-five patients (7 females and 28 males) with cerebral infarction and suspicion of cerebral infarction of 4 h to 27 months duration were studied 45 times with magnetic resonance (MR) imaging using Bd-DTPA. Spin echo (SE) images were obtained before and after the administration of Gd-DTPA (0.1 or 0.15 mmol/kg) and compared with the enhanced CT. MR imaging using Gd-DTPA was more sensitive than enhanced CT and very useful for detecting a new focus of cerebral infarction, especially in the cases with multiple infarcted areas and for showing the extent of cortical and subcortical infarction. In most cases the MR enhancement was obvious in the subacute stage, especially after cerebral embolism, and the signal intensity of the lesion tended to show a gradual increase. The diagnosis of embolism was accepted on the basis of acute onset without prior TIA, coupled with angiography showing the embolus itself and/or a capillary blush and a wide area of infarction.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00404100
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    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Multiple photoionization from 3p excitation of Kr and 4p excitation of Xe (1986)
    Springer
    The European physical journal 4 (1986), S. 25-30 
    Details
    ISSN: 1434-6079
    Keywords: 32.30.Rj ; 33.80.Dz ; 33.80.Hd
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The photoionization cross sections for multiply charged ions produced by 3p excitation of Kr and 4p excitation of Xe have been obtained by means of a time-of-flight mass spectrometer and synchrotron radiation. It is found that the main formation of doubly to quadruply charged ions in both Kr and Xe is caused from the each initialp-hole state through a Coster-Kronig transition followed by Auger or double Auger processes. The formation of singly charged ions in these excitation energy regions is caused by direct photoionization from outermost shell electrons in both Kr and Xe. Triply charged ions are prominently produced among the multiply charged ions. The quadruple photoionization cross sections show clearly the structures due to the Rydberg series, 3p −1 nl of Kr and 4p −1 nl of Xe. Their main structures were assigned to the 3p −1 nd series in Kr and the 4p −1 nd series in Xe.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01432495
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    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Online pH,pCO2 andpO2 monitoring system using two-way cyclic pumping of lactate Ringer as a baseline solution (1987)
    Springer
    Medical & biological engineering & computing 25 (1987), S. 45-50 
    Details
    ISSN: 1741-0444
    Keywords: Blood gas ; ISFET ; Lactate Ringer ; Patient monitoring ; pCO2 ; pH ; pO2
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Medicine
    Notes: Abstract A system for the online, simultaneous and intermittent analysis of blood pH, pCO2 pO2 using two-way cyclic pumping of lactate Ringer as a baseline solution is described. The multi-gas sensor is composed of a pH-ISFET with a temperature sensor, a pH-ISFET-based pCO2 sensor and a Clark-type pO2 sensor, bundled in an epoxy rod, and held in place in a flow cell which is directly connectable to an indwelling cannula. The system is controlled by a microcomputer, which supervises pump operation, temperature-compensation of sensor outputs, one-point calibration using sampled blood analysis, and provides graphical display of monitored results. Results of arterial blood-gas monitoring for mongrel dogs are presented which demonstrate the reliability of the present system over extended periods.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02442819
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    Paper (German National Licenses)
    Fulltext
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