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  • Binneaarse radio-isotoop angiografie karotis-kaverneuse fistels 
    Van Heerden, P. D. R.   Rose Innes, A. P.   Klopper, J. F. (Health and Medical Publishing Group (HMPG), 1975)
    The use of intravenous radio isotope angiography in 3 cases of unilateral carotid cavernous sinus fistula is described. The lesion gives a characteristic image pattern distinguishable from that of arteriovenous malformation ...
  • A simple automated system for the routine production of (99m)Tc by methyl ethyl ketone extraction 
    Klopper, J. F.   Van Heerden, P. D. R.   Muller, U. D.   Baard, W. P. (HMPG, 1974-05)
    A relatively simple, automated system for the rapid, efficient and safe routine production of 99Tc(m)O4 from 99Mo03 by the metyl ethyl ketone (MEK) extraction technique is described. The 4 phases of the extraction process ...