title: [Demonstration of non-metallic foreign bodies by conventional x-ray techniques and computer tomography. Absorption coefficient of glass, plastic and wood (author's transl)].
abstract: Densitometric measurements were carried out on various types of glass, plastic and wood in order to determine the scope of computer tomography in detecting nonmetallic foreign bodies. CT was superior to conventional film techniques for localising glass when situated near bone. Densitometry of plastic materials showed wide variation of these substances and the results hae been tabulated. Heavy polymers exceeded +200 H, light synthetic materials were between 0 and -100 H. Computer tomographic absorption measurements of wood showed that the density depended on its water content. Measurements of different types of wood, with different degrees of hydration, showed that changes in density could be brought about by incorporation of fluid into the wood.
mesh_terms: D015502:Absorptiometry, Photon; D000273:Adipose Tissue / Q000000981:diagnostic imaging; D005547:Foreign Bodies / Q000000981:diagnostic imaging*; D005898:Glass; D009132:Muscles / Q000000981:diagnostic imaging; D010969:Plastics; D014054:Tomography; D014057:Tomography, X-Ray Computed; D014934:Wood
chemical_list: D010969:Plastics
vernacular_title: Nachweisbarkeit von nicht-metallischen Fremdkörpern durch konventionelle Röntgentechnik und Computertomographie. Strahlenabsorptionskoeffizienten von Glas, Kunststoff und Holz.