Is There Any Difference Between a Spherical Marker and a Simple Coin for Hip Replacement Digital Planning?

 To evaluate the accuracy and differences between 2 types of metallic markers, sphere, and coin, for radiographic calibration in the preoperative planning of hip arthroplasty.  Four spherical metallic markers and four coins, both 25 mm in diameter, were placed on the greater trochanter, pubic symphysis, between the thighs, and on the table of the exam, for radiographic examination of the hip in 33 patients with hip prosthesis. The prosthesis head was used for calibration and two examiners measured the markers' image diameters, and the results were analyzed statistically.

Errata - Is it Important to Know Where to Place the Spherical Marker for Hip Replacement Digital Planning??

[This corrects the article DOI: 10.1055/s-0039-1693052.][This corrects the article DOI: 10.

Is it Important to Know Where to Place the Spherical Marker for Hip Replacement Digital Planning?

 The present paper aims to evaluate the influences of individual characteristics in radiographic magnification and to identify the most accurate method for radiographic calibration.  During radiographical exam of 50 patients with hip prosthesis, anthropometric data was collected and 4 spherical metal markers with 25 mm diameters were positioned: at the greater trochanter level and lateral to it, over the pubic symphysis, between the thighs at the greater trochanter level, and over the exam table. Since the prosthesis head is the best internal radiographic marker for hip arthroplasty, it was our calibration parameter.