Improved estimation of phase aberration profiles

Two previous approaches to estimate phase aberration profiles with a single transmit pulse from speckle are examined. The first employs cross-correlation between signals on all pairs of neighboring elements. In the other, cross-correlation between signals on all elements and the beamsum is used. Here, the two methods are studied in detail, and the advantages and disadvantages of each are discussed. It is shown that cross-correlations between neighboring elements result in a bias in the estimated phase profile, while correlations to the beamsum result in higher error variance. A new approach combining the two is introduced. Experimental results demonstrate that this new method provides a superior phase aberration profile. Furthermore, it is shown that this improved phase profile enhances image quality when used to correct both transmitter and receiver.

[1]  Raoul Mallart,et al.  The van Cittert–Zernike theorem in pulse echo measurements , 1991 .

[2]  A. Weiss,et al.  Fundamental limitations in passive time delay estimation--Part I: Narrow-band systems , 1983 .

[3]  M. O'Donnell,et al.  Adaptive compensation of phase and magnitude aberrations , 1996, IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control.

[4]  Raoul Mallart,et al.  Adaptive focusing in scattering media through sound‐speed inhomogeneities: The van Cittert Zernike approach and focusing criterion , 1994 .

[5]  R C Waag,et al.  Measurements of ultrasonic pulse arrival time and energy level variations produced by propagation through abdominal wall. , 1994, The Journal of the Acoustical Society of America.

[6]  W. Walker,et al.  A fundamental limit on the performance of correlation based phase correction and flow estimation techniques , 1994, IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control.

[7]  M. O'Donnell,et al.  Phase-aberration correction using signals from point reflectors and diffuse scatterers: measurements , 1988, IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control.

[8]  Mathias Fink,et al.  Time Reversal of Ultrasonic Fields-Part 11: Experimental Results , 1992 .

[9]  R C Waag,et al.  Time-shift compensation of ultrasonic pulse focus degradation using least-mean-square error estimates of arrival time. , 1992, The Journal of the Acoustical Society of America.

[10]  S.W. Smith,et al.  Experimental results with a real-time adaptive ultrasonic imaging system for viewing through distorting media , 1990, IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control.

[11]  M. Fink,et al.  Time-reversal of ultrasonic fields. III. Theory of the closed time-reversal cavity , 1992, IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control.

[12]  D Rachlin.  Direct estimation of aberrating delays in pulse-echo imaging systems. , 1990, The Journal of the Acoustical Society of America.

[13]  G E Trahey,et al.  A real-time adaptive ultrasonic imaging system. , 1990, Investigative radiology.

[14]  S. W. Smith,et al.  Phase aberration correction in medical ultrasound using speckle brightness as a quality factor. , 1989, The Journal of the Acoustical Society of America.

[15]  M. O'Donnell,et al.  Phase Aberration Measurements in Medical Ultrasound: Human Studies , 1988 .

[16]  M. Fink,et al.  Time reversal of ultrasonic fields. Il. Experimental results , 1992, IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control.

[17]  B.D. Steinberg,et al.  Wavefront amplitude distortion and image sidelobe levels. II. In vivo experiments , 1993, IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control.

[18]  M. O'Donnell,et al.  Correlation-based aberration correction in the presence of inoperable elements , 1992, IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control.

[19]  G.E. Trahey,et al.  A comparative evaluation of several algorithms for phase aberration correction , 1994, IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control.

[20]  M O'Donnell,et al.  Transmit aperture processing for nonlinear contrast agent imaging. , 1996, Ultrasonic imaging.

[21]  B. Steinberg,et al.  Wavefront amplitude distortion and image sidelobe levels. I. Theory and computer simulations , 1993, IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control.

[22]  B D Steinberg.  A discussion of two wavefront aberration correction procedures. , 1992, Ultrasonic imaging.

[23]  M. O'Donnell,et al.  A phase aberration correction method for ultrasound imaging , 1993, IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control.

[24]  P. Isaacs,et al.  Body wall aberration correction in medical ultrasonic images using synthetic-aperture data , 1993 .

[25]  M. O’Donnell,et al.  Phase-aberration correction using signals from point reflectors and diffuse scatterers: basic principles , 1988, IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control.

[26]  R C Waag,et al.  Correction of ultrasonic wavefront distortion using backpropagation and a reference waveform method for time-shift compensation. , 1994, The Journal of the Acoustical Society of America.

[27]  M. O'Donnell,et al.  Efficient Two-Dimensional Blocked Element Compensation , 1994 .

[28]  Mathias Fink,et al.  Time-Reversal of Ultrasonic Fields-Part 111: Theory of the Closed Time-Reversal Cavitv J , 1992 .

[29]  W. Walker,et al.  A speckle target adaptive imaging technique in the presence of distributed aberrations , 1997, IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control.

[30]  M. Fink,et al.  Time reversal of ultrasonic fields. I. Basic principles , 1992, IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control.