Model based 3D CS-catheter tracking from 2D X-ray projections: binary versus attenuation models.

Area of Science:

• Medical Imaging
• Biomedical Engineering
• Interventional Cardiology

Background:

• Accurate tracking of medical devices in X-ray data is crucial for procedures.
• Existing methods may lack precision in capturing device motion and position.
• Coronary sinus (CS) catheterization requires precise navigation during interventions.

Purpose of the Study:

• To present and evaluate a 3D deformable catheter model for tracking CS catheters.
• To compare the efficacy of voxel-based models with attenuation information versus binary models for 2D/3D registration.
• To assess the tracking accuracy of the proposed approach in simulated and clinical rotational angiography data.

Main Methods:

• Development of a 3D deformable catheter model incorporating voxel-based attenuation information.
• Application of 2D/3D registration techniques to track a CS catheter through rotational angiography sequences.
• Evaluation using simulated and clinical data of contrast-enhanced left atrium imaging.

Main Results:

• The 3D deformable model with attenuation information achieved an average registration accuracy of 0.23 mm in 2D and 0.95 mm in 3D for catheter electrodes.
• Voxel-based models with attenuation information demonstrated superior performance compared to binary catheter models.
• The method enables extraction of 3D catheter shapes from individual 2D projections.

Conclusions:

• 3D deformable models with attenuation information offer enhanced accuracy for medical device tracking in X-ray imaging.
• This approach improves the precision of coronary sinus catheter tracking during rotational angiography.
• The findings support the use of detailed catheter models for improved interventional procedure guidance.