Radiograph-Based Radiomics Successfully Classify MRI-Based Identification of Femoral Loosening in Patients With Total
Jack Consolini1, Elizabeth G Koretsky1, Kevin M Koch1
1Department of Radiology and Imaging, Hospital for Special Surgery, New York City, New York, USA.
Summary
Radiograph radiomics can accurately detect hip implant loosening, a common cause of total hip arthroplasty revision. This low-cost method uses standard X-rays to improve implant integration evaluation.
Area of Science:
- Orthopedic Surgery
- Medical Imaging
- Radiology
Background:
- Aseptic loosening is a primary reason for total hip arthroplasty (THA) revision.
- Three-dimensional multi-spectral magnetic resonance imaging (3D MSI-MRI) is sensitive for detecting femoral stem loosening but not routinely used.
- Standard radiographs are commonly acquired during routine follow-up.
Purpose of the Study:
- To investigate if radiograph-based radiomics can identify femoral component loosening confirmed by 3D MSI-MRI.
- To assess the potential of radiomics as an adjunct for evaluating implant integration in THA.
Main Methods:
- A cohort study included 38 symptomatic and 40 asymptomatic subjects with THA.
- 3D MSI-MRI confirmed loosening; standard AP pelvis radiographs were analyzed using radiomics.
- Radiomic features were extracted from periprosthetic regions (Gruen zones), processed, and analyzed using logistic regression.
Main Results:
- Radiograph radiomics achieved high accuracy in detecting loosening.
- Gruen zones 3 and 7 showed the highest performance (AUC=0.76).
- A full periprosthetic model yielded an AUC of 0.74.
Conclusions:
- Radiograph-based radiomics can accurately detect femoral component loosening in THA patients.
- This method offers a scalable, cost-effective tool for routine post-operative evaluation.
- Radiomics can enhance the assessment of implant integration using readily available radiographs.
