Elasticity mapping of tissue mimicking phantoms by remote palpation with a focused ultrasound beam and intensity autocorrelation measurements

C. Usha Devi; R. S. Bharat Chandran; R. M. Vasu; A. K. Sood

doi:10.1117/12.740958

1 May 2007 Elasticity mapping of tissue mimicking phantoms by remote palpation with a focused ultrasound beam and intensity autocorrelation measurements

C. Usha Devi, R. S. Bharat Chandran, R. M. Vasu, A. K. Sood

Author Affiliations +

Proceedings Volume 6535, Saratov Fall Meeting 2006: Optical Technologies in Biophysics and Medicine VIII; 65350R (2007) https://doi.org/10.1117/12.740958
Event: Saratov Fall Meeting 2006, 2006, Saratov, Russian Federation

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.

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C. Usha Devi, R. S. Bharat Chandran, R. M. Vasu, and A. K. Sood "Elasticity mapping of tissue mimicking phantoms by remote palpation with a focused ultrasound beam and intensity autocorrelation measurements", Proc. SPIE 6535, Saratov Fall Meeting 2006: Optical Technologies in Biophysics and Medicine VIII, 65350R (1 May 2007); https://doi.org/10.1117/12.740958

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KEYWORDS

Modulation

Transducers

Ultrasonography

Absorption

Tissue optics

Photons

Tissues

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