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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