Speckle decorrelation due to two-dimensional flow gradients

  title={Speckle decorrelation due to two-dimensional flow gradients},
  author={B H Friemel and L. N. Bohs and K. Florence Nightingale and G. E. Trahey},
  journal={IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control},
The performance of ultrasonic velocity estimation methods is degraded by speckle decorrelation, the change in received echoes over time. Because ultrasonic speckle is formed by the complex sum of echoes from subresolution scatterers, it is sensitive to the relative motion of those scatterers. Velocity gradients in flowing blood result in relative scatterer motion and can be a significant source of speckle decorrelation. Computer simulations were performed to evaluate speckle decorrelation due… CONTINUE READING

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