Sonja Wismath

Sonja Wismath
Technische Universität Darmstadt | TU · Department of Electrical Engineering and Information Technology (Dept.18)

Master of Science

About

3
Publications
1,099
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7
Citations

Publications

Publications (3)
Article
Full-text available
Capacitive micromachined ultrasonic transducers (CMUTs) represent an accepted technology for ultrasonic transducers, while high bias voltage requirements and limited output pressure still need to be addressed. In this paper, we present a design for ultra-low-voltage operation with enhanced output pressure. Low voltages allow for good integrability...
Conference Paper
Full-text available
We present a 10 N nominal needle tip force sensor based on silicon-based semiconductor strain gauges that can be used in brachytherapy or biopsies. As deformation body the guiding rod of such a surgical needle with a diameter of 1.2 mm is used. In a thinned area, near the tip of the needle, the strain gauge, as sensing element, is applied with a fl...
Conference Paper
Needle insertion is a common medical task. Certain procedures such as brachytherapy, biopsies or punctures of pericardial effusions require the insertion of comparably thick needles (Ø 1 mm) into human tissue. A large risk of additional tissue damaging exists because of the needle size. Additionally, the needle compresses and displaces tissue adjac...

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