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Medical AI Inquiry: You was designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.  Labels: OBJECTIVE, METHODS, RESULTS. Meshes: Arthroplasty, Replacement, Hip, Female, Hip Joint, Hip Prosthesis, Humans, Imaging, Three-Dimensional, Male, Middle Aged, Observer Variation, Prognosis, Prosthesis Fitting, Radiographic Image Interpretation, Computer-Assisted, Reproducibility of Results, Retrospective Studies, Sensitivity and Specificity, Signal Processing, Computer-Assisted, Software, Surgery, Computer-Assisted, Tomography, X-Ray Computed, Treatment Outcome.
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Does digital Planning Software fail to Reflect Stem Torsion on Plain Radiographs after Total Hip Arthroplasty? Context: The purpose of this study was to evaluate the validity of commercially available planning software on plain radiographs after THA compared to CT scans as the gold standard. In a prospective clinical study, anteroposterior (AP) radiographs and three-dimensional CT scans (3D-CT) were obtained for 121 patients, who underwent minimally invasive, cementless THA with a straight tapered stem, in a lateral decubitus position. For measuring SV, we used digital planning software (TraumaCad 2.0, BrainLAB Feldkirchen, Germany). Two independent raters repeated the analysis after a six-week interval. Radiological measurements were compared with 3D-CT measurements by an independent, blinded external institute. This investigation was approved by the local ethics commission (no. 10 -121- 0263) and is a secondary analysis of a larger project (DRKS00 000 739, German Clinical Trials Register May-02 - 2011). The radiograph measurements showed very high intra- and interrater agreement. The intra-class correlation (ICC) of the intrarater agreement was 0.97 for rater 1 and 0.98 for rater 2. The intrarater reliability was 0.99 using the mean values of both rater measurements. The mean difference between the average radiograph measurement and the 3D-CT-based measurement was 0.41° (SD 11.24°) (range: -33.85°-22.50°; 95 % limits of agreement: -21.63 - 22.45), but there was no correlation found between both methods.
assistant
Measuring stem version with the help of commercially available digital planning software on plain radiographs after THA has high intra- and interrater reliability but clinically inacceptable validity and reliability when compared to 3D-CT scans. Final Decision: yes