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Lev Ostrosvsky, Applied Mathematics Colloquium
September 23, 2016 @ 4:00 pm - 5:00 pm
Tea at 3:30 in Phillips Hall 330
Title: Acoustic radiation force and its biomedical applications
Abstract: Radiation force (RF), stress, and pressure are average forces generated by a field and acting on a body, boundary, or distributed in space. The case ofelectromagnetic radiation pressure on an interface is well known and used to be a subject of intensive research in the past. The concept of AcousticRadiation Force (ARF) was introduced by Lord Rayleigh in 1902 as “the pressure of vibrations”. More recently this concept found broad biomedical applications as a tool for manipulation of biological cells and particles, and in medical diagnostics, particularly assessing viscoelastic properties of biological tissues and in their imaging. Here we give examples of such applications, as well as of theoretical modeling of the effects of shear wave generation by an ultrasonic beam. These are used for diagnostics and manipulation of micro-particles and micro-bubbles in standing acoustic waves in plane and cylindrical configurations. Theoretical results are compared with available experimental data.
