Abstract #0203

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

Axel Joachim Krafft^1,2,3, 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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