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Validating the process of taking lateral foot x-rays

P R Perlman1, P Dubois, V Siskind

  • 1Queensland University of Technology, Australia.

Journal of the American Podiatric Medical Association
|July 1, 1996
PubMed
Summary
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Standard weightbearing lateral X-rays are clinically similar to dynamic gait findings. This validates using static X-rays for assessing foot and ankle biomechanics during walking.

Area of Science:

  • Orthopedics
  • Radiology
  • Biomechanics

Background:

  • Assessing foot and ankle biomechanics is crucial for diagnosing gait abnormalities.
  • Traditional methods often involve dynamic analysis, which can be complex and resource-intensive.

Purpose of the Study:

  • To validate the clinical similarity between standard static weightbearing lateral X-rays and dynamic ambulatory gait findings.
  • To determine if static X-rays can reliably represent in-vivo gait parameters.

Main Methods:

  • Sixty female subjects underwent videofluoroscopy during walking gait.
  • A single-frame, shuttle-advance video recorder identified key fluoroscopic frames.
  • The calcaneal pitch angle was measured using a digitized program from static X-rays and dynamic fluoroscopy.

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Main Results:

  • The study demonstrated a high repeatability in the measurement process.
  • A high correlation was found between calcaneal pitch angle measurements from static X-rays and dynamic fluoroscopic assessments.
  • Static weightbearing lateral X-rays accurately reflect findings during ambulatory gait.

Conclusions:

  • Standard static weightbearing lateral X-rays, taken with an orthoposer, are clinically equivalent to dynamic gait assessments.
  • This validation supports the use of static X-rays as a practical and reliable tool for evaluating gait and foot biomechanics.