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Haptic sensor-actuator-system based on ultrasound elastography and electrorheological fluids for virtual reality applications in medicine

  • Mechanical properties of biological tissue represent important diagnostic information and are of histological relevance (hard lesions, "nodes" in organs: tumors; calcifications in vessels: arteriosclerosis). The problem is, that such information is usually obtained by digital palpation only, which is limited with respect to sensitivity. It requires intuitive assessment and does not allow quantitative documentation. A suitable sensor is required for quantitative detection of mechanical tissue properties. On the other hand, there is also some need for a realistic mechanical display of those tissue properties. Suitable actuator arrays with high spatial resolution and real-time capabilities are required operating in a haptic sensor actuator system with different applications. The sensor system uses real time ultrasonic elastography whereas the tactile actuator is based on electrorheological fluids. Due to their small size the actuator array elements have to be manufactured by micro-mechanical production methods. In order to supply the actuator elements with individual high voltages a sophisticated switching and control concept have been designed. This haptic system has the potential of inducing real time substantial forces, using a compact lightweight mechanism which can be applied to numerous areas including intraoperative navigation, telemedicine, teaching, space and telecommunication.

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Metadaten
Author:W. Khaled, Helmut Ermert, Otto T. Bruhns, S. Reichling, Holger Böse, Michael Baumann, Gareth J. MonkmanORCiDGND, Stefan Egersdörfer, Alexander Meier, Dagmar Klein, Herbert Freimuth
Pubmed Id:https://pubmed.ncbi.nlm.nih.gov/15455880
Parent Title (German):Studies in health technology and informatics, Medicine Meets Virtual Reality (MMVR)
Publisher:IOS Press
Document Type:Article
Language:German
Year of first Publication:2003
Release Date:2022/12/12
Volume:11
Issue:94
First Page:144
Last Page:150
Institutes:Fakultät Elektro- und Informationstechnik
Fakultät Elektro- und Informationstechnik / Mechatronics Research Unit (MRU)
research focus:Produktion und Systeme
Licence (German):Keine Lizenz - Es gilt das deutsche Urheberrecht: § 53 UrhG