TY - JOUR

T1 - Nonuniform Phase Distribution in Ultrasound Speckle Analysis—Part I

T2 - Background and Experimental Demonstration

AU - Weng, Li

AU - Reid, John M.

AU - Shankar, P. M.

AU - Soetanto, Kawan

AU - Lu, Xuan Ming

N1 - Funding Information:
Manuscript received June 3, 1991; revised October 15, 1991; accepted December 6, 1991. This work was supported in part by N.I.H. research grant #HL30045 from the National Heart, Lung and Blood Institute, and in part by research grant #CA52823-01 from the National Cancer Institute.

PY - 1992/5

Y1 - 1992/5

N2 - In some cases, the statistical properties of the phase of ultrasound speckle in B-scan images differ from the uniform distribution characteristic exhibited by the fully developed speckle. This phenomenon has been noted when examining scattering structures with a somewhat regular spacing using wideband pulse excitation. It is shown by computer simulation and experiments on phantoms that when the mean scatterer spacing is equal to multiples of a half wavelength at the reference frequency of the receiver quadrature demodulator, the center of the echo phase distribution, plotted on the complex plane, will shift away from the origin. When the spacing is equal to an odd multiple of a quarter wavelength, the phase distribution will have a figure “8” shape. By noticing these noncircular phase distributions while changing the demodulation frequency, the mean scatterer spacing can be estimated.

AB - In some cases, the statistical properties of the phase of ultrasound speckle in B-scan images differ from the uniform distribution characteristic exhibited by the fully developed speckle. This phenomenon has been noted when examining scattering structures with a somewhat regular spacing using wideband pulse excitation. It is shown by computer simulation and experiments on phantoms that when the mean scatterer spacing is equal to multiples of a half wavelength at the reference frequency of the receiver quadrature demodulator, the center of the echo phase distribution, plotted on the complex plane, will shift away from the origin. When the spacing is equal to an odd multiple of a quarter wavelength, the phase distribution will have a figure “8” shape. By noticing these noncircular phase distributions while changing the demodulation frequency, the mean scatterer spacing can be estimated.

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U2 - 10.1109/58.143169

DO - 10.1109/58.143169

M3 - Article

AN - SCOPUS:0026867504

SN - 0885-3010

VL - 39

SP - 352

EP - 359

JO - IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control

JF - IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control

IS - 3

ER -