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.
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.
Entities:
Keywords:
AC, Acetabular Component; BMI, Body Mass Index; FFD, Focus Film Distance; FH, Femoral Head; GE, General Electrics; HFD, Hip Film Distance; Hip arthroplasty; MF, Magnification Factor; MFAC, Magnification Factor from Acetabular Component; MFFH, Magnification Factor from Femoral Head; PACS, Picture Archivingand Communication System; Preoperative planning; THA, Total hip arthroplasty; X-ray magnification
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