Berlin 2008 – wissenschaftliches Programm
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ST: Fachverband Strahlen- und Medizinphysik
ST 4: Poster Session Radiation and Medical Physics
ST 4.4: Poster
Montag, 25. Februar 2008, 16:30–17:00, H 2033
Technique for a Sense of Touch inside the Head — •Ole Oehms1, Marcus Radicke1, Meinert Lewerenz1, Sarah Wrede1, Bernd Habenstein1, Peter Trautner2, Bernd Weber2, and Karl Maier1 — 1Helmholtz Institut für Strahlen- und Kernphysik, Universität Bonn — 2Life & Brain Research Center, Bonn
If a 30ms long Ultrasound (US) pulse is irradiated into a sample during a diffusion sensitive Magnetic Resonance Imaging (MRI) sequence, the US can generate contrasts in the image between tissues or liquids with different viscoelastic properties. If the US could be coupled through the cranium into the brain, this effect could possibly be used to visualize brain tumors or Alzheimer plaques. First measurements will be presented, which demonstrate the effect of the US on the MR image and the feasibilty of a coupling of the US through a model of a bone. The US frequency is tuned in such a way, that a resonance condition inside the bone occures. In this case, the US amplitude behind the bone rises enormously and the US effects on the sample can be visualized with the MRI scanner.