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  • 1
    ISSN: 1432-1920
    Keywords: Spinal cord compression ; Computed tomography ; Magnetic resonance imaging ; Ossification of ligamentum flavum
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Sixteen cases of thoracic radiculomyelopathy due to ossification of the ligamentum flavum (OLF) were analyzed. The patients ranged in age from 39 to 78 years (average 57 years). There were 13 men and 3 women. A significant predilection of OLF for the lower thoracic spine (T9/10, T10/11, T11/12) was noticed. Plain X-ray of the thoracic spine and multidirectional tomography could give important information about the site of ossification. Computed tomography with the intrathecal injection of the water-soluble contrast material clearly demonstrated the ossification and the degree of compression of the spinal cord. The disadvantages of using computed tomography for diagnosing OLF included the necessity for the scan level to be previously decided by other methods because computed tomography of the entire spine was impractical. Magnetic resonance imaging was performed in 14 patients and gave important information about OLF and the compression of the spinal cord. The combination of MRI and computed tomography seems the most useful for the precise diagnosis of OLF.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Neuroradiology 33 (1991), S. 458-461 
    ISSN: 1432-1920
    Keywords: Capillary hemangioma ; Spinal vascular malformation ; Neuroradiological examination
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary A case of capillary hemangioma of the cauda equina is reported. Myelography with water-soluble contrast material showed a complete obstruction of the contrast column at the L1–L2 level. Neither plain nor intravenously enhanced CT revealed the tumor. Spinal angiography showed a feeding vessel to the tumor and a faint tumor stain. Magnetic resonance imaging (MRI) showed a mass lesion of slightly higher than cauda equina intensity, which was clearly enhanced with Gd-DTPA. MRI, especially Gd-DTPA- enhanced study, plays the most important role in the diagnosis of a spinal capillary hemangioma. Spinal angiography was interesting in showing a tumour with a capillary blush.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Chromatographia 20 (1985), S. 364-366 
    ISSN: 1612-1112
    Keywords: Thin-layer chromatography ; Cellulose phosphate ; Inorganic ions ; Sulfuric acid-organic solvent media
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary Thin-layer chromatographic behavior of 49 inorganic ions on cellulose phosphate (P-cellulose) has systematically been surveyed with binary solvent mixtures consisting of sulfuric acid and an organic solvent such as methanol or acetone. The Rf values of many bivalent and monovalent ions as well as Te(VI) decrease on the P-cellulose layer with an increasing concentration of the organic solvent. Polyvalent ions which form strong phosphato-complexes and precipitate insoluble sulfate are strongly retained on P-cellulose. Oxy-anions, Au(III) and Pt(IV) are not adsorbed on the cellulose to any great extent. Feasibilities of the separation of multicomponent mixtures are demonstrated on the P-cellulose layer.
    Type of Medium: Electronic Resource
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