Low-Dose Radiography,Radiography,and CT Measurements Of The Combined Anteversion Angle After Total Hip Arthroplasty

Propose:Low-Dose Radiography,Radiography,and CT were used to measure the the combined anteversion Angle after total hip arthroplasty.To investigate the clinical application value of radiography,especially low-dose radiography detection,in evaluating the position of prosthesis after hip arthroplasty.Methods:Fifty patients who underwent total hip arthroplasty in our hospital between 2021 and 2022 were collected.Low-dose radiography(70kVp,12.5mAs),radiography(75kVp,25mAs),pelvic CT and femur CT were taken after surgery for all patients.The femoral prosthesis anteversion,acetabular prosthesis anteversion and combined anteversion were measured and calculated,and the measured results were statistically analyzed.Results:(1)Low dose radiography(70kVp,12.5mAs)was selected to meet the needs of this study.(2)low-dose radiograph of femoral prosthesis anteversion 14.790°±5.783°,radiograph of femoral prosthesis anteversion 14.76°±5.111°,CT of femoral prosthesis anteversion 16.15°±9.436°;low-dose radiograph of acetabular prosthesis anteversion 22.01°±0.979°(Lewinnek method),21.86°±0.916°(Liaw method);radiograph of acetabular prosthesis anteversion 21.91°±0.850°(Lewinnek method),21.9°±1.014°(Liaw method),CT of acetabular prosthesis anteversion 23.85°±4.574°;low-dose radiograph of combined anteversion 36.80°±5.852°(Lewinnek method),36.740°±5.901°(Liaw method),radiograph of combined anteversion 36.68°±5.194°(Lewinnek method),36.62°±5.243°(Liaw method);CT of combined anteversion 40.00°±9.915°.The results of intra-group and inter-group consistency analysis showed good consistency(ICC>0.75).Therefore,it is considered that the experimental data have high reliability.(3)Compared with CT,there was no significant difference in the results of low-dose radiograph and radiograph detection(p>0.05).Compared with CT measurement of acetabular prosthesis anteversion,there was no statistical difference between low-dose radiograph and radiograph detection results(p>0.05).Compared with CT,there was no significant difference in the results of low-dose radiograph and radiograph detection(p>0.05).(4)There was a good correlation(r>0.40)between the low-dose radiograph of femoral prosthesis anteversion,radiograph of femoral prosthesis anteversion with CT of femoral prosthesis anteversion,low-dose radiograph of acetabular prosthesis anteversion,radiograph of acetabular prosthesis anteversion with CT of acetabular prosthesis anteversion,as well as low-dose radiograph of combined anteversion,and radiograph of combined anteversion with CT of combined anteversion.There was an excellent correlation(r>0.90)between low-dose radiograph with radiograph of femoral prosthesis anteversion,low-dose radiograph with radiograph of acetabular prosthesis anteversion,as well as low-dose radiograph with radiograph of combined anteversion.Conclusions:Low-dose radiography can be used to evaluate the position of prostheses after total hip arthroplasty and it is a reliable,low-radiation alternative to CT.Low-dose radiography testing,although not widely used in the clinic today,is worth promoting in the future.