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Updated: Feb 5, 2026

Individualized Stem-positioning in Calcar-guided Short-stem Total Hip Arthroplasty
Published on: February 27, 2018
Assessment of magnification of digital radiographs in total HIP arthroplasty
Nuria I Olmedo-Garcia1, Jose L Martínez Vergara1, Tamara L Aparici Miralles1
1Castellon University General Hospital, Avenida Benicásim, s/n 12004, Castellón, Spain.
Objective:
Total hip arthroplasty (THA) preoperative planning requires the calibration of X-ray. We evaluate the magnification in standard pelvis hip X-ray and determine its relation with biometric factors.
Methods:
The magnification of 140 THA X-ray were calculated with the known femoral head (MFFH) and acetabular component (MFAC). Gender, age, height, weight, and BMI were correlated to the magnification.
Results:
The MFFH and MFAC were 113.2 ± 4,4 and 113,4 ± 3,6 respectively. No significant differences by gender and no correlation with height, weight or BMI.
Conclusion:
The X-ray magnification should be calibrated in every institution to improve the accuracy of preoperative planning.
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