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Abstract #1605

Improved Workflow for Freehand MR-Guided Percutaneous Needle Interventions: Methods and Validation

Eva Rothgang1, 2, Clifford R. Weiss3, Frank Wacker4, Joachim Hornegger1, Christine H. Lorenz2, 3, Wesley D. Gilson2, 3

1Pattern Recognition Lab, Department of Computer Science, Friedrich-Alexander University, Erlangen, Germany; 2Center for Applied Medical Imaging, Siemens Corporate Research, Baltimore, MD, United States; 3Russell H. Morgan Department of Radiology and Radiological Science, Johns Hopkins University, Baltimore, MD, United States; 4Department of Radiology, Hannover Medical School, Hannover, Germany

An increasing number of minimally-invasive percutaneous needle interventions is performed under MR guidance including biopsies, targeted drug delivery and thermal ablations. However, these procedures are still mainly performed at tertiary care centers and the complexity of the current workflow is a primary barrier for more widespread adoption. This study presents software-based methods to improve time efficiency and targeting accuracy of freehand percutaneous MR-guided punctures by simplifying trajectory planning, entry point localization, and slice alignment without introducing additional equipment.

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Keywords

abdominal accuracy adoption ahead aliasing align alignment appears appropriate artifact artifacts assess automatic automatically axes bands barrier biopsies boxes built capable care choosing community compatible continuous control coordinate corporate cross cubes dataset designed determined developed difficult display displaying distance embedded ensure entry experience experienced fingertip frank freehand front guided hairs ideal identify in vivo inferior initial integrated intelligent interactive interventions intra intuitive johns kidney knows laser lies literature localization long magnet manual measuring medical minimized minutes moreover movement much needle obliquity offset organ orientation orientations oriented orthogonal overall particularly patient pattern percutaneous phantom placement placements planned planning preferentially prescribed principal procedure procedures projection punctures radiological radiologists radiology rapid real reducing reformatting rendering reported respect reviewing ring saturation scanner school science screen seal sectional simplify site skin slice software space steps strategy structures studies superior syringe system table target targeting technician third tool trajectories trajectory typically upper user usually validation verification visible wherein widespread