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Reliability of the Digital Image Analysis Program Mdesk for Assessing Acetabular Component Positioning on Plain

Anne Mette Stausholm1, Thomas Jakobsen1, Anders El-Galaly1

  • 1Department of Orthopedic Surgery, Aalborg University Hospital, 18-22 Hobrovej, 9000 Aalborg, Denmark.

Indian Journal of Orthopaedics
|October 7, 2025
PubMed
Summary

Mdesk software demonstrates high reliability for measuring acetabular component positioning after total hip arthroplasty (THA). This tool supports quality monitoring in THA patients, ensuring accurate component placement for successful outcomes.

Keywords:
Clinical monitoringDigitalHipHip replacementMdeskPostoperative analysisRadiologyReliabilityTHAValidation

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Area of Science:

  • Orthopedic surgery
  • Medical imaging analysis
  • Quality assurance in healthcare

Background:

  • Accurate fixation and positioning of acetabular and femoral components are crucial for successful total hip arthroplasty (THA).
  • Continuous monitoring of component positioning using postoperative X-rays is vital for quality assurance after THA.
  • Reliable measurement tools are essential for assessing component positioning in THA quality monitoring.

Purpose of the Study:

  • To evaluate the inter- and intra-observer reliability of the Mdesk digital image analysis program.
  • To assess Mdesk's accuracy in measuring acetabular component positioning in patients who underwent THA.

Main Methods:

  • A multicenter reliability study involving 102 patients with osteoarthritis undergoing unilateral THA.
  • Analysis of postoperative AP pelvic and cross-table lateral radiographs using Mdesk version 4.0.
  • Inter- and intra-tester reliability assessed using interclass correlation coefficients (ICC) with 95% confidence intervals (CI).

Main Results:

  • High intraobserver reproducibility for all acetabular measurements (ICC > 0.80).
  • High interobserver reliability for most measurements (ICC > 0.74).
  • Moderate interobserver reliability was found for Δ lateral offset and cup protrusion measurements (ICC = 0.665 and 0.614, 0.600).

Conclusions:

  • Mdesk demonstrates high reliability in measuring key acetabular parameters for THA.
  • The findings suggest Mdesk is a viable tool for postoperative monitoring in total hip arthroplasty.
  • Mdesk can aid in ensuring accurate component positioning and improving quality monitoring after THA.