Philipp J. Stolka

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Steerability in percutaneous medical devices is highly desirable, enabling a needle or needle-like instrument to avoid sensitive structures (e.g. nerves or blood vessels), access obstructed anatomical targets, and compensate for the inevitable errors induced by registration accuracy thresholds and tissue deformation during insertion. Thus, mechanisms for(More)
Many recent studies have demonstrated the efficacy of interstitial ablative approaches for the treatment of hepatic tumors. Despite these promising results, current systems remain highly dependent on operator skill, and cannot treat many tumors because there is little control of the size and shape of the zone of necrosis, and no control over ablator(More)
One of the steps during the implantation of hearing aids and cochlea implants is the creation of a shallow implant bed in the thin skull bone. Correct placement of the implant is paramount but difficult to achieve preoperatively. The profile of the calotte, which can be determined through e.g. 3D imaging, is important for this task. Additionally, in a(More)
Current approaches to establish or improve precision of registration and execution in (surgical) robotics, especially milling applications, mostly aim at determining an exact relationship between intervention area and the robot. However, this is subject to quality deterioration due to positional shifts and deformations under load. Therefore, in this work we(More)
Surgical procedures with navigation or robot system support usually require pre-operative planning data. This data can be acquired with imaging techniques such as computed tomography (CT), the current gold standard due to its high precision. With such imaging data, access trajectories, implant positions, individual milling paths, etc. can be computed. We(More)
We present an image-guided intervention system based on tracked 3D elasticity imaging (EI) to provide a novel interventional modality for registration with pre-operative CT. The system can be integrated in both laparoscopic and robotic partial nephrectomies scenarios, where this new use of EI makes exact intra-operative execution of pre-operative planning(More)
Currently, robotic systems employ almost exclusively global sensor information for navigation purposes. While a global map facilitates planning, it may have insufficient quality. Especially with autonomous robots, additional information - intra-process, spatial, current, and persistent sensor data - proves necessary to cope with uncertainty, measurement(More)