Visualization tool for improved accuracy in needle placement during percutaneous radio-frequency ablation of liver tumors

Thomas Stüdeli; Denis Kalkofen; Petter Risholm; Wajid Ali; Adinda Freudenthal; Eigil Samset

doi:10.1117/12.769399

26 March 2008 Visualization tool for improved accuracy in needle placement during percutaneous radio-frequency ablation of liver tumors

Thomas Stüdeli, Denis Kalkofen, Petter Risholm, Wajid Ali, Adinda Freudenthal, Eigil Samset

Author Affiliations +

Proceedings Volume 6918, Medical Imaging 2008: Visualization, Image-Guided Procedures, and Modeling; 69180B (2008) https://doi.org/10.1117/12.769399
Event: Medical Imaging, 2008, San Diego, California, United States

Abstract

The European research network "Augmented reality in Surgery" (ARIS*ER) developed a system that supports percutaneous radio frequency ablation of liver tumors. The system provides interventionists, during placement and insertion of the RFA needle, with information from pre-operative CT images and real-time tracking data. A visualization tool has been designed that aims to support (1) exploration of the abdomen, (2) planning of needle trajectory and (3) insertion of the needle in the most efficient way. This work describes a first evaluation of the system, where user performances and feedback of two visualization concepts of the tool - needle view and user view - are compared. After being introduced to the system, ten subjects performed three needle placements with both concepts. Task fulfillment rate, time for completion of task, special incidences, accuracy of needle placement recorded and analyzed. The results show ambiguous results with beneficial and less favorable effects on user performance and workload of both concepts. Effects depend on characteristics of intra-operative tasks as well as on task complexities depending on tumor location. The results give valuable input for the next design steps.

Citation Download Citation

Thomas Stüdeli, Denis Kalkofen, Petter Risholm, Wajid Ali, Adinda Freudenthal, and Eigil Samset "Visualization tool for improved accuracy in needle placement during percutaneous radio-frequency ablation of liver tumors", Proc. SPIE 6918, Medical Imaging 2008: Visualization, Image-Guided Procedures, and Modeling, 69180B (26 March 2008); https://doi.org/10.1117/12.769399

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