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  • Electronic Resource  (2)
  • 1980-1984  (2)
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  • Electronic Resource  (2)
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  • 1
    ISSN: 0942-0940
    Keywords: Cerebral aneurysm ; subarachnoid haemorrhage ; vasospasm ; computed tomography ; Hounsfield number
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary We have studied the correlations between computed tomograms (CT), clinical severity at the time of onset, and subsequent development of cerebral infarction due to vasospasm in 32 cases with subarachnoid haemorrhage secondary to rupture of cerebral aneurysms. It was found that the clinical severity could be judged by CT as shown by the amount of blood in subarachnoid space. Furthermore, it was possible to predict the subsequent occurrence of cerebral infarction by sequential findings of CT. A Hounsfield number of the high density area over 60 showed good correlation with the development of cerebral infarction.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1572-9540
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The57Fe Mössbauer isomer shifts and magnetic hyperfine fields in Laves phase compounds RFe2 (R=Pr, Nd and Sm) are studied with particular reference to the effect of the Fe−Fe interatomic distance on the hyperfine interactions. It is shown that the charge density at the Fe nuclei scales linearly with fractional volume change up to 20%. The57Fe hyperfine field corrected for the influence of rare-earth moment shows a systematic variation with the distance, which can be understood in terms of the Bethe-Slater curve arguments. The similarity of the atomic volume dependence of the57Fe hyperfine interactions in Lves phase compounds to those in iron with close-packed structure is emphasized.
    Type of Medium: Electronic Resource
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