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Proceedings Paper

Elasticity mapping of tissue mimicking phantoms by remote palpation with a focused ultrasound beam and intensity autocorrelation measurements
Author(s): C. Usha Devi; R. S. Bharat Chandran; R. M. Vasu; A. K. Sood
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Paper Abstract

We use a focused ultrasound beam to load a region of interest (ROI) in a tissue-mimicking phantom and read out the vibration amplitude of phantom particles from the modulation depth in the intensity autocorrelation of a coherent light beam that intercepted the ROI. The modulation depth, which is also affected by the local light absorption coefficient, which is employed in ultrasound assisted optical tomography, to read out absorption coefficient is greatly influenced by the vibration amplitude, depends to a great extend on local elasticity. We scan a plane in an elastography phantom with an inhomogeneous inclusion, in elasticity with the focused ultrasound and from the measured modulation depth variation create a qualitative map of the elasticity variation in the interrogated plane.

Paper Details

Date Published: 1 May 2007
PDF: 7 pages
Proc. SPIE 6535, Saratov Fall Meeting 2006: Optical Technologies in Biophysics and Medicine VIII, 65350R (1 May 2007); doi: 10.1117/12.740958
Show Author Affiliations
C. Usha Devi, Indian Institute of Science, Bangalore (India)
R. S. Bharat Chandran, Indian Institute of Science, Bangalore (India)
R. M. Vasu, Indian Institute of Science, Bangalore (India)
A. K. Sood, Indian Institute of Science, Bangalore (India)


Published in SPIE Proceedings Vol. 6535:
Saratov Fall Meeting 2006: Optical Technologies in Biophysics and Medicine VIII

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