| Paper: | BIO-P3.6 | ||
| Session: | Biomedical Imaging | ||
| Time: | Thursday, May 18, 10:00 - 12:00 | ||
| Presentation: | Poster | ||
| Topic: | Bio Imaging and Signal Processing: Ultrasound imaging | ||
| Title: | Nonlinear Effects on Confocal-Beam Radiation-Force Imaging | ||
| Authors: | Alexia Giannoula, Dimitrios Hatzinakos, Richard Cobbold, University of Toronto, Canada | ||
| Abstract: | The dynamic acoustic radiation force produced by two confocal ultrasound beams, can be used for imaging the acoustic properties of tissue. In this paper we investigate how nonlinear propagation in an attenuating medium can affect image quality. Specifically, the effects of the second harmonic on the image formation process are studied, by means of the system point-spread-function (PSF). Incorporation of tissue nonlinearities in the model and extraction of higher-harmonic information, indicates that a more localized radiation force distribution and reduced sidelobe effects can be achieved and this could improve image resolution. | ||
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