Introduction

  • Joseph Gambarelli
  • Gérard Guérinel
  • Laurent Chevrot
  • Mathieu Mattèi

Abstract

In radiological technology, the positional ray absorption by the object is evidenced by the action of the residual energy on the films. This results in superimposed image elements which do not allow small absorption differences to be apprehended. The advent of new positive or negative contrast media increased the discrimination possibilities, although it did not allow quantitative assessment.

Keywords

Attenuation Osteoporosis Convolution Lution Tate 

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Copyright information

© Springer-Verlag Berlin Heidelberg 1977

Authors and Affiliations

  • Joseph Gambarelli
    • 1
  • Gérard Guérinel
    • 1
  • Laurent Chevrot
    • 2
  • Mathieu Mattèi
    • 3
  1. 1.Faculté de Médecine de Marseille, Laboratoire d’AnatomieCollège Médical Français des Professeurs d’AnatomieMarseille Cedex 4France
  2. 2.Service Central de Radiologie du C.H.U. de la TimoneMarseilleFrance
  3. 3.Centre de Tomodensitométrie de la F.E.R.R.A.C.MarseilleFrance

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