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Phantom evaluation of a navigation system for out-of-plane CT-guided puncture
L Moncharmont1, A Moreau-Gaudry2, M Medici2
1Service de radiologie et d'imagerie médicale, hôpital Nord, CHU de Grenoble, CS 10217, 38043 Grenoble cedex 9, France.
Diagnostic and Interventional Imaging
|May 5, 2015
Summary
A new electromagnetic navigation system significantly improved novice operator accuracy and speed for phantom punctures compared to standard CT guidance. This real-time navigation offers a promising alternative for minimally invasive procedures.
Area of Science:
- Medical Imaging and Interventional Radiology
- Surgical Navigation Technologies
Background:
- Computed tomography (CT) guidance is a standard method for minimally invasive procedures.
- Challenges exist in achieving high accuracy with CT guidance, especially for out-of-plane trajectories.
Purpose of the Study:
- To evaluate a novel real-time electromagnetically-guided navigation system.
- To compare its performance against standard CT guidance in a phantom study.
Main Methods:
- A prospective, randomized, comparative phantom study.
- 54 novice operators performed target punctures using either the new navigation system (NAV) or CT guidance.
- Out-of-plane trajectories to 6mm targets were assessed.
Main Results:
- 40.7% of operators achieved first-attempt target accuracy with NAV versus 0% with CT guidance (P<0.001).
- Puncture accuracy was superior with NAV (median distance 3.7mm vs 15mm, P<0.001).
- NAV significantly reduced planning and puncture time (median 76s vs 214s, P<0.001).
Conclusions:
- The electromagnetically-guided navigation system enables faster and more accurate phantom punctures for novice operators.
- This system demonstrates superior performance compared to standard CT guidance for out-of-plane trajectories.
