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Related Experiment Videos

Accurate characterization of image intensifier distortion.

S Rudin1, D R Bednarek, R Wong

  • 1Department of Radiology, State University of New York, School of Medicine and Biomedical Sciences, Buffalo 14215.

Medical Physics
|November 1, 1991
PubMed
Summary

Image intensifier distortion can be accurately modeled using a two-parameter odd-power polynomial. This new method surpasses existing one-parameter models for image intensifier distortion characterization.

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Area of Science:

  • Physics
  • Optical Engineering

Background:

  • Image intensifiers (IIs) are susceptible to distortion.
  • Photocathode curvature and electron optics are primary causes of II distortion.

Purpose of the Study:

  • To develop and validate a novel mathematical model for image intensifier distortion.
  • To compare the accuracy of a new two-parameter model against existing one-parameter models.

Main Methods:

  • Experimental data acquisition from four diverse image intensifier models (9-14 inch diameter).
  • Application of a two-parameter odd-power polynomial model to experimental distortion data.
  • Comparison of the proposed model's accuracy with two alternative one-parameter models.

Main Results:

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  • The two-parameter odd-power polynomial provided a highly accurate approximation of image intensifier distortion.
  • The proposed model demonstrated superior accuracy compared to existing one-parameter characterizations.
  • Standard errors for the two-parameter fit were below 0.1 mm, or 0.03% of the field of view, within measurement error.

    • Conclusions:

    • A simple two-parameter odd-power polynomial effectively models image intensifier distortion.
    • This model offers improved accuracy for characterizing distortion in various image intensifier types.
    • The findings provide a more precise method for correcting image intensifier distortions.