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Abstract #1859

Automatic Device Tracking in a Closed-Bore MRI: Principle and Initial Experimental Results on a Robotically Driven Needle

Gregor Thrmer1, Nikita Garnov1, Jrgen Haase2, Thomas Kahn1, Michael Moche1, Harald Busse1

1Diagnostic and Interventional Radiology, Leipzig University Hospital, Leipzig, Germany; 2Physics and Geosciences Department, Leipzig University, Leipzig, Germany

Localization and tracking of devices in a closed-bore scanner may improve the accuracy and workflow of MR-guided interventions and also reduce a potential user bias. The goal was to evaluate the performance of a novel image-based approach for device tracking which is demonstrated in a phantom experiment with a robotically driven needle inside the magnet. The presented method is based on the automatic localization of wireless MR-visible markers in poorly resolved MR images. Integration of the localization algorithm into a custom-made pulse sequence with interleaved anatomical imaging would provide a relatively simple and safe alternative to other tracking approaches.