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[Measurement of the hip joint space using automatic digital image analysis]
T Conrozier1, A M Tron, J C Balblanc
1Laboratoire d'Exploration Articulaire, Pavillon F. Hôpital Edouard Herriot, Lyon.
Revue Du Rhumatisme (Ed. Francaise : 1993)
|February 1, 1993
Summary
A new computer program accurately measures hip joint surface area (JSA) and mean joint space width (MJSW) from X-rays. This method shows high reliability and correlates well with existing techniques for assessing hip osteoarthritis.
Area of Science:
- Radiology
- Orthopedics
- Medical Imaging Analysis
Background:
- Accurate measurement of hip joint space is crucial for diagnosing and monitoring osteoarthritis.
- Traditional methods can be subjective and time-consuming.
Purpose of the Study:
- To evaluate a novel computer-assisted method for measuring hip joint surface area (JSA) and mean joint space width (MJSW).
- To assess the reliability and correlation of this new technique with existing methods.
Main Methods:
- Digitalized frontal weight-bearing pelvic roentgenograms were analyzed using the ICMS-Techline computer program.
- Measurements were taken within a defined angle (ECS) to ensure consistency.
- Interobserver and intra-observer variability were calculated, and results were compared to Lequesne's method.
Main Results:
- The ICMS-Techline program demonstrated high reliability with low interobserver (4.7% for JSA, 3.3% for MJSW) and intra-observer coefficients of variation.
- A strong positive correlation was found between MJSW and JSA (r=0.87).
- The new method showed excellent agreement with Lequesne's method for osteoarthritis assessment (r=0.89).
Conclusions:
- The ICMS-Techline computer program provides a reliable and reproducible method for measuring hip JSA and MJSW.
- This technique offers a valuable tool for the objective assessment of hip joint space, particularly in the context of osteoarthritis.