Keywords: MR-Guided Interventions, Interventional Devices, Active Tracking
Motivation: MR-thermometry is a promising approach for real-time monitoring of lesion formation during MRI-guided cardiac ablation. However, ablation catheters can potentially drift during ablation and lead to inaccurate lesion formation.
Goal(s): To develop a cardiac MR-thermometry sequence with integrated catheter drift detection.
Approach: Continuous active tracking modules were added between the cardiac triggered acquisitions of a cardiac MR-thermometry sequence. Low-pass temporal filtering of the active tracking signal was then applied to remove cardiac and respiratory components and estimate catheter drift. This approach was evaluated in a phantom.
Results: This study showed that catheter drift detection is possible within active tracking in an MR-thermometry sequence.
Impact: This study demonstrates the potential for simultaneous catheter drift detection and cardiac MR-thermometry, which may improve the safety of the procedure and the accuracy of lesion formation. Further evaluation in-vivo is now warranted.
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