Papers Published

1. Pinton, G.F. and McAleavey, S.A. and Dahl, J.J. and Nightingale, K.R. and Trahey, G.E., Real-time acoustic radiation force impulse imaging, Proc. SPIE - Int. Soc. Opt. Eng. (USA), vol. 5750 no. 1 (2005), pp. 226 - 35 [12.595846] .
   (last updated on 2007/04/13)

   Abstract:
   Acoustic radiation force impulse (ARFI) imaging uses short duration acoustic pulses to generate and subsequently determine localized displacements in tissue. Time delay estimators, such as normalized cross correlation and phase shift estimation, form the computational basis for ARFI imaging. This paper considers these algorithms and the effects of noise, interpolation, and quadrature demodulation on the accuracy of the time delay estimates. These results are used to implement a real-time ARFI imaging system and in an ex vivo liver ablation study

   Keywords:
   biological tissues;biomedical ultrasonics;delays;demodulation;estimation theory;interpolation;liver;medical image processing;noise;