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Proceedings Paper

Ultrasonic radiation forces for elasticity imaging of 3-D tissue models
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Paper Abstract

A novel ultrasonic elasticity imaging technique is being developed to study structural properties of hydropolymers including biological tissues. Radiation force is applied to harmonically stress the medium while ultrasonic Doppler and optical methods track deformation. This paper delineates basic system design and describes methods for pressure-field calibration using an acoustic radiometer, this extends to applying a radiation force to the media to remotely exert a locally oscillating stress field at the desired frequency within or on the medium surface. We use a single-element, spherically-focused, circular piston element driven by a pulsing voltage to produce a vibrating stress. Spectral Doppler techniques were successfully adapted to image the locally induced vibration. Our system delivers acoustic energy locally with an intensity matched to the acoustic attenuation and stiffness of the common biopolymers matrigel and chitosan.

Paper Details

Date Published: 12 March 2007
PDF: 11 pages
Proc. SPIE 6513, Medical Imaging 2007: Ultrasonic Imaging and Signal Processing, 65130H (12 March 2007); doi: 10.1117/12.710644
Show Author Affiliations
M. Orescanin, Univ. of Illinois at Urbana-Champaign (United States)
M. F. Insana, Univ. of Illinois at Urbana-Champaign (United States)

Published in SPIE Proceedings Vol. 6513:
Medical Imaging 2007: Ultrasonic Imaging and Signal Processing
Stanislav Y. Emelianov; Stephen A. McAleavey, Editor(s)

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