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Registration accuracy in computer-assisted pelvic surgery
P L Docquier1, L Paul, O Cartiaux
1Department of Orthopaedic Surgery, Saint-Luc University Hospital (Université catholique de Louvain), Brussels, Belgium. Pierre-Louis.Docquier@uclouvain.be
Summary
Computer-assisted surgery systems improve pelvic tumor resection accuracy. Optimal placement of the dynamic reference base (DRB) and sampling area are key for precise registration in computer-assisted pelvic surgery.
Area of Science:
- Orthopaedic Surgery
- Medical Imaging
- Computer-Assisted Surgery
Background:
- In vitro study to evaluate computer-assisted system accuracy in pelvic surgery.
- System applied to a simulated pelvic tumor resection using a sawbone model.
Purpose of the Study:
- Assess global registration accuracy of a computer-assisted system.
- Quantify accuracy errors in pelvic orthopaedic surgery simulations.
Main Methods:
- Twenty pelvic landmarks created; virtual model generated from CT scan.
- Surface-based matching algorithm used for sawbone registration.
- Landmark deviations calculated to determine global accuracy error.
Main Results:
- Initialization point location did not impact accuracy.
- Dynamic reference base (DRB) placement away from the working area yielded best results.
- Accuracy improved with increased sampling area, but decreased with excessive expansion.
Conclusions:
- DRB placement on the contralateral side of the pelvis is recommended.
- Posterior extension and inclusion of the entire working area in the sampling surface enhance accuracy.
- Optimizing DRB and sampling area improves computer-assisted pelvic surgery precision.
