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Related Experiment Video

Updated: Jun 19, 2026

Lower-Limb Biomechanical Characteristics Associated with Unplanned Gait Termination Under Different Walking Speeds
05:52

Lower-Limb Biomechanical Characteristics Associated with Unplanned Gait Termination Under Different Walking Speeds

Published on: August 25, 2020

Reliability of lower limb alignment measures using an established landmark-based method with a customized computer

Elizabeth A Sled1, Lisa M Sheehy, David T Felson

  • 1Queen's University, Kingston, Canada.

Rheumatology International
|November 3, 2009
PubMed
Summary
This summary is machine-generated.

Computer-assisted lower limb alignment measurement using a bone landmark method is highly reliable. This study found excellent agreement between manual and computer measurements, and high reader reliability for computer analysis of full-limb radiographs.

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Area of Science:

  • Orthopedics
  • Radiology
  • Biomechanical analysis

Background:

  • Accurate measurement of frontal plane lower limb alignment is crucial for orthopedic diagnosis and treatment planning.
  • Traditional manual measurement methods can be subject to inter- and intra-reader variability.

Purpose of the Study:

  • To evaluate the reliability of a landmark-based method for measuring frontal plane lower limb alignment.
  • To compare the reliability of manual versus computer-assisted measurements.
  • To determine the inter- and intra-reader reliability of computer-assisted measurements from full-limb radiographs.

Main Methods:

  • A bone landmark-based method involving 10 femoral and tibial landmarks was used.
  • Manual and computer-assisted measurements were compared using digital and paper-based images of simulated limb alignments.
  • Inter- and intra-reader reliability of computer-assisted measurements was assessed using 100 full-limb digital radiographs from the Multicenter Osteoarthritis Study.

Main Results:

  • Both manual and computer-assisted measurements demonstrated excellent agreement (Intraclass Correlation Coefficients [ICCs] ranging from 0.820 to 0.999).
  • The computer program applied to full-limb radiographs showed high inter- and intra-reader reliability (ICCs 0.839-0.998).

Conclusions:

  • A bone landmark-based approach combined with a computer program provides highly reliable measurements for frontal plane lower limb alignment.
  • Computer-assisted measurement enhances the consistency and reliability of alignment assessments, beneficial for clinical and research applications.