Combining the APES and Minimum-variance Beamformers for Adaptive Ultrasound Imaging

Ultrasonic Imaging
Babak Mohammadzadeh Asl

Abstract

In recent years, adaptive minimum-variance (MV) beamforming has been successfully applied to medical ultrasound imaging, resulting in simultaneous improvement in imaging resolution and contrast. MV has high resolution and hence can provide accurate estimates of the target locations. However, the MV amplitude estimates are significantly biased downward, especially when occurring the errors in model parameters. The amplitude and phase estimation (APES) beamformer gives much more accurate amplitude estimates at the target locations, but at the cost of lower resolution. To reap the benefits of both MV and APES, we have proposed a modified APES (MAPES) beamformer by adding a parameter which controls the trade-off between spatial and amplitude resolutions. We have also proposed an adaptive beamformer which combines the MV and APES. The proposed beamformer first estimates the peak locations using the MV estimator and then refines the amplitude estimates at these locations using the MAPES estimator. By using simulated and experimental data-point targets as well as cyst phantoms-we show the efficacy of the proposed beamformers.

References

Sep 1, 1996·Medical & Biological Engineering & Computing·K G Boone, D S Holder
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Aug 21, 2007·IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control·Johan-Fredrik SynnevågSverre Holm
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Oct 9, 2009·IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control·Johan-Fredrik SynnevagSverre Holm
Oct 9, 2009·IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control·Babak Mohammadzadeh Asl, Ali Mahloojifar
Nov 28, 2009·IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control·Carl-Inge Colombo Nilsen, Ines Hafizovic
Nov 3, 2010·IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control·Babak Mohammadzadeh Asl, Ali Mahloojifar
Feb 24, 2011·IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control·Johan-Fredrik SynnevagSverre Holm
Apr 22, 2011·IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control·Babak Mohammadzadeh Asl, Ali Mahloojifar
May 2, 2012·IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control·Babak Mohammadzadeh Asl, Ali Mahloojifar

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Citations

Jan 15, 2018·Ultrasonics·Babak Mohammadzadeh Asl, Ali Mohades Deylami

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Software Mentioned

Field II
MAPES

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