Home | english  | Impressum | KIT
Photo von Heinz Wörn

Prof. Dr.-Ing. Dr. h.c. Heinz Wörn

Professor im Ruhestand
Tel.: +49 721 608-44006
Fax: +49 721 608-47141
woernLrh3∂kit edu


Zur Person

Professor Wörn studierte Elektrotechnik an der Universität Stuttgart und promovierte dort am Institut für Werkzeugmaschinen mit seiner Arbeit zu dem Thema "Mehrprozessorsteuerungssystem für Werkzeugmaschinen mit standartisierten Schnittstellen". Im Anschluss arbeitete er bei KUKA Schweißanlagen und Roboter GmbH, wo er eine leitende Stellung in Forschung und Entwicklung inne hatte. Professor Wörn ist ein international anerkannter Experte für Roboter und Automation. Seine Erfahrung umfasst Roboteranwendungen, Robotersteuerungen und Sensoren für Roboter, sowie deren Programmmierung und Simulation. Seit 1997 leitet er das Institut für Prozessrechentechnik, Automation und Robotik der Universität Karlsruhe als Professor für "Komplexe Systeme in Automation und Robotik".

Forschungsgebiete

  • Planung, Programmierung, Steuerung, Diagnose und Sensorsysteme für Industrieroboter
  • Autonome, mobile Roboter, Mikroroboter, Serviceroboter, Teleroboter, Autonome Fahrzeuge
  • Planung und Simulation von Anlagen und Fabriken
  • Roboter- und sensorgestützte Chirurgie
  • Mikromontage
  • Modellierung komplexer Systeme in Produktion und Medizin

Minimal traumatic surgery on the lateral skull base

AutorM. Riechmann, P. U. Lohnstein, J. Raczkowsky, T. Klenzner, J. Schipper, H. Wörn
Jahr2007
Veröffentlicht inInternational Journal of Computer Assisted Radiology and Surgery
EditorU. Lembke
Kurzfassung1. Introduction Today surgeons reach their target structures in the lateral skull base by milling all bony structures starting from the mastoid by avoiding critical structures e.g. nerves, vessels. This produces a large cavity that guarantees a workspace wide enough to proceed with conventional surgical tools and an operation microscope. Introducing endoscopic surgery in skull base interventions promises the surgeon to carry out operations less traumatic, because the area of bone that needs to be ablated can be reduced to small channels. These provide just as much space as needed to insert the instruments into the situs. 2. Methods The challenge of this approach can be classified into two general tasks: The correct placement of the working channels into the anatomy of the temporal bone and the consideration of the endoscope’s working space. One task is the placement of the endoscopes: Beyond and inside the temporal bone there are several vital or functional important organs. When the access channels are drilled, the trajectories need to be chosen carefully to ensure they only pass through the bony area. Critical structures are to be avoided. Therefore very precise planning software is developed to help the surgeon performing this task. To support the process of image segmentation for finding the critical structures an interactive model based approach is intended. In addition to carefully defining the trajectories of the working channels the feasibility of the endoscopic intervention has to be verified due to the limited working space of the endoscopes. To render it computable the endoscopic instruments and the intervention itself are formalized. The operations considered in this project are the “decompression of the saccus endolymphaticus” and the “exploration of the inner auditory canal”. 3. Results Several model based image segmentation algorithms have been evaluated and the anatomy of the temporal bone has been examined for interindividual correlations and registration possibilities. As a result a model is being developed that allows automatically tagging the critical structures and a safety clearance around them. A mechanical training system has been built for exploring the working space of the endoscopic instruments und first experiments have been launched. 4. Conclusion Endoscopic interventions in surgery of the lateral skull base promise to reduce traumata and might even enable operations in anatomical situations where conventional techniques would fail. Using model based segmentation promises an efficient high precision planning of the intervention. Additional research is necessary for defining the formal descriptions and algorithms to verify the feasibility of the operation for a given set of channels.
Bibtex@article{ ipr_1170857176, author = "{M. Riechmann and P. U. Lohnstein and J. Raczkowsky and T. Klenzner and J. Schipper and H. W{{\"o}}rn}", title = "{Minimal traumatic surgery on the lateral skull base}", year = "2007", journal = "{International Journal of Computer Assisted Radiology and Surgery}", pages = "485--486", }
zurück zur Publikationsübersicht