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Research in biomedical nanotechnology led already to a variety of applications of nanoparticles in diagnosis as well as in therapy. One of these medical applications is Magnetic Drug Targeting, a promising cancer treatment technique. The aim of this medical attendance is a local chemotherapeutic treatment of the cancerous tissue. For this purpose, chemotherapeutic drugs are bound to magnetic nanoparticles and accumulated in the tumor area by means of an external static magnetic field. Hereby, a well-defined particle concentration in the cancerous tissue requires monitoring of the particle accumulation. Therefore, we present an ultrasound imaging technique that is capable of detecting quantitatively the concentration of iron oxide nanoparticles in biological tissue. The evaluation is based on the variation of the speed of sound of an induced shear wave with respect to the particle concentration.

Sonographic Detection of Iron Oxide Nanoparticles Employing Shear Waves