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Abstract #0203

An MR-compatible Assistance System for MR-guided Needle Interventions: Initial Phantom Evaluation

Axel Joachim Krafft1,2,3, Simon Reiss2, Andreas Reichert2, Michael Vogele4, and Michael Bock2

1German Cancer Consortium (DKTK), Heidelberg, Germany, 2Radiology – Medical Physics, University Medical Center Freiburg, Freiburg, Germany, 3German Cancer Research Center (DKFZ), Heidelberg, Germany, 4iSYS Medizintechnik GmbH, Kitzbuehel, Austria

Minimally invasive interventions highly benefit from imaging guidance during instrument positioning and monitoring of therapeutic progress. MRI with its unique soft tissue contrast and ability for functional imaging is ideally suited for interventional guidance. To enable and facilitate minimally invasive interventions in closed-bore high-field MR systems with small bore diameters that severely limit patient access, we propose a novel, versatile assistance system in combination with passive instrument tracking. The system was studied in a systematic phantom experiment during needle procedures, and a mean targeting accuracy of less than 2 mm was achieved (mean procedure time: 6.5 min).

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