Journal of Nondestructive Evaluation

, Volume 4, Issue 2, pp 75–88 | Cite as

The radiographic edge scattering distortion

  • D. R. Wyman
  • A. A. Harms


Previously described scattering based edge distortions in optical density scans obtained from a neutron radiographic knife-edge image have been here confirmed using analog Monte Carlo simulation. In an attempt to estimate the effects of additional object scatter on such artifacts, the effect on the edge response of diffusely incident neutrons has been determined both empirically and by Monte Carlo simulation. The diffuse neutron incidence has been found to diminish the relative magnitude of the distortion, offering explanation for the infrequent observation of the corresponding edge scattering halo artifacts. The potential of this edge distortion as a diagnostic indicator of the buildup factor in radiography is suggested and examined.

Key words

object scattering edge scattering knife edge neutron radiography buildup factor NDE 


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. 1.
    R. Halmshaw,Physics of Industrial Radiology (American Elsevier, New York, 1966).Google Scholar
  2. 2.
    D. R. Wyman and A. A. Harms, System transfer function applications in neutron radiography,Nucl. Sci. Eng., in press.Google Scholar
  3. 3.
    J. C. Osuwa and A. A. Harms, The extremum-slope criterion for precise dimensional measurements in neutron radiography,Proc. First World Conf. Neutron Radiography, San Diego, Calif., 1981 (D. Reidel, Holland, 1982), p. 859.Google Scholar
  4. 4.
    A. Vary and K. J. Bowles, Application of an electronic image analyzer to dimensional measurements from neutrons radiographs,Mat. Eval. 32(1):7 (1974).Google Scholar
  5. 5.
    S. J. Basham, D. R. Grieser, and J. W. Ray, Dimensional measurement of cylindrical specimens using neutron radiography,Mat. Eval. 26(6):140 (1970).Google Scholar
  6. 6.
    E. W. Marchand, From line to point spread function: the general case,J. Opt. Soc. Am. 55:352 (1965).Google Scholar
  7. 7.
    D. R. Wyman and A. A. Harms, Neutron image blurring in two dimensions,Trans. Am. Nucl. Soc. 44:206 (1983).Google Scholar
  8. 8.
    U. V. Gopala Rao and P. Fatouros, The relationship between resolution and speed of X-ray intensifying screens,Med. Phys. 5(3):205 (1978).Google Scholar
  9. 9.
    Y. Segal, A. Gutman, A. Fishman, and A. Notea, Point spread functions due to neutron scattering in thermal neutron radiography of aluminum, iron, zircaloy and polyethylene objects,Nucl. Instrum. Meth. 197:557 (1982).Google Scholar
  10. 10.
    Y. Segal, A. Gutman, A. Fishman, and A. Notea, Scattering point spread functions in neutron radiography, in ref. 3, p. 929.Google Scholar
  11. 11.
    G. B. Arfken,Mathematical Methods for Physicists (Academic Press, New York, 1970).Google Scholar
  12. 12.
    R. Matfield, On the underlying causes for the shape of the density trace of a round object, in ref. 3, p. 817.Google Scholar
  13. 13.
    M. P. Butler and A. A. Harms, Neutron image simulation by Monte Carlo methods, in ref. 3, p. 937.Google Scholar
  14. 14.
    J. J. Duderstadt and L. J. Hamilton,Nuclear Reactor Analysis (Wiley, New York, 1976).Google Scholar
  15. 15.
    L. L. Carter and E. D. Cashwell,Particle Transport Simulation with the Monte Carlo Method (USERDA Technical Information Center, Oak Ridge, Tenn., 1975).Google Scholar
  16. 16.
    J. Spanier and E. M. Gelbard,Monte Carlo Principles and Neutron Transport Problems (Addison Wesley, Reading, Mass., 1969).Google Scholar
  17. 17.
    D. R. Wyman, Neutron transport in radiography, Ph.D. dissertation, McMaster University, Hamilton, Canada (1984).Google Scholar
  18. 18.
    A. A. Harms, B. K. Garside, and P. S. W. Chan, Edge-spread function in neutron radiography,J. Appl. Phys. 43(9):3863 (1972).Google Scholar
  19. 19.
    R. H. Herz,The Photographic Action of Ionizing Radiations (Wiley-Interscience, New York, 1969).Google Scholar
  20. 20.
    J. P. Barton, Contrast sensitivity in neutron radiography,Appl. Mat. Res. (April, 1965), p. 90.Google Scholar
  21. 21.
    P. Von der Hardt and H. Röttgen, eds.,Neutron Radiography Handbook, Joint Research Centre, Petten Establishment (D. Reidel, Holland 1981).Google Scholar

Copyright information

© Plenum Publishing Corporation 1984

Authors and Affiliations

  • D. R. Wyman
    • 1
  • A. A. Harms
    • 1
  1. 1.Department of Engineering PhysicsMcMaster UniversityHamiltonCanada

Personalised recommendations