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Measurements of young's modulus of viscoelastic medium using a laser-induced microbubble under acoustic radiation force

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5 Author(s)
Sangpil Yoon ; Dept. of Mech. Eng., Univ. of Texas at Austin, Austin, TX, USA ; Aglyamov, S. ; Karpiouk, A. ; Seungsoo Kim
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An approach to assess the mechanical properties of a viscoelastic medium using laser-induced microbubbles is presented. A 532 nm wavelength nanosecond pulsed laser beam was focused into a phantom to create a microbubble at the desired location. A 3.5 MHz ultrasound transducer was used to generate acoustic radiation force to excite the laser-induced microbubble. Motion of the microbubble was tracked using a 25 MHz imaging transducer. An agreement between a theoretical model of bubble motion in viscoelastic medium and experimental measurements was demonstrated. Young's moduli reconstructed using the laser-induced microbubble approach were compared with those of direct measurements. Thus, the proposed approach can be used to assess the mechanical properties of viscoelastic medium such as soft tissue.

Published in:

Ultrasonics Symposium (IUS), 2010 IEEE

Date of Conference:

11-14 Oct. 2010

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