Hier finden Sie wissenschaftliche Publikationen aus den Fraunhofer-Instituten.

Mechanical properties of single cells-measurement possibilities using time-resolved scanning acoustic microscopy

: Lemor, R.M.; Weiss, E.; Zinin, P.; Pilarczyk, G.


Yuhas, M.P. ; IEEE Ultrasonics, Ferroelectrics, and Frequency Control Society:
IEEE Ultrasonics Symposium 2004. Proceedings. Vol.1 : A conference of the IEEE Ultrasonics, Ferroelectrics, and Frequency Control Society (UFFC-S). Part of IEEE International Ultrasonics, Ferroelectrics, and Frequency Control 50th Anniversary Joint Conference. 23 - 27 August 2004, Palais des Congrès, Montréal, Canada
Piscataway, NJ: IEEE Operations Center, 2004
ISBN: 0-7803-8412-1
S.622- 629
IEEE Ultrasonics Symposium <2004, Montreal>
International Ultrasonics, Ferroelectrics, and Frequency Control Joint Fiftieth Anniversay Conference <2004, Montreal>
Fraunhofer IBMT ()

The interconnection between biochemical and mechanical processes inside cells, particularly cardiac cells, is of fundamental interest in biology and medicine. Scanning acoustic microscopy (SAM) allows the study of elastic properties of biological cells. However, conventional SAM is too slow to trace fast variations of cardiac cell mechanical properties during contraction, and low frequency time-resolved SAM used in biology and medicine does not provide enough resolution to study the elasticity of a single cell. In this report, we present the primary results obtained by the time-resolved, high frequency acoustic microscope on quantitative measurements of the local mechanical properties of single cultured cells in vivo. A Fourier spectrum approach is applied to determine the effect of the SAM characteristics, such as frequency response and semi-aperture angle of the lens, on the accuracy of the elastic properties' measurements. The potential of our approach is discussed through the investigation of the cytoskeleton of different cell lines and the contraction apparatus of cardiac muscle cells.