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Abstract #1196

Fast 3D Passive Needle Localization for MR-Guided Interventions using Radial White Marker Acquisitions and CNN Postprocessing

Jonas F. Faust1,2, Axel J. Krafft2, Daniel Polak2, Ralf Vogel3, Peter Speier2, Nicolas G. R. Behl2, Mark E. Ladd4, and Florian Maier2
1Ruprecht-Karls-Universität Heidelberg, Heidelberg, Germany, 2Siemens Healthcare GmbH, Erlangen, Germany, 3Pattern Recognition Lab, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany, 4Medical Physics in Radiology, German Cancer Research Center (DKFZ), Heidelberg, Germany


Accurate 3D localization of biopsy needles during MR-guided interventions is especially challenging due to time restrictions in real-time workflows. While active tracking methods rely on additional RF-sensitive hardware, rapid passive tracking methods often make use of markers or prior knowledge regarding the needle location. In an ex-vivo study, we investigated a novel passive tracking method using heavily undersampled, radial acquisitions in combination with contrast-optimized White Marker imaging and CNN image postprocessing regarding its potential to speed up passive needle artifact localization without the use of additional hardware or prior knowledge on the needle location.

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