### Abstract

For Pt. II, see ibid., vol. 39, no. 3, pp. 360-365 (1992). 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 those noncircular phase distributions while changing the demodulation frequency, the mean scatterer spacing can be estimated.

Original language | English |
---|---|

Pages (from-to) | 352-359 |

Number of pages | 8 |

Journal | IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control |

Publication status | Published - 1992 May |

Externally published | Yes |

### Fingerprint

### ASJC Scopus subject areas

- Electrical and Electronic Engineering
- Acoustics and Ultrasonics

### Cite this

*IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control*, 352-359.

**Nonuniform phase distribution in ultrasound speckle analysis--I : Background and experimental demonstration.** / Weng, Li; Reid, John M.; Shankar, P. M.; Soetanto, Kawan; Lu, Xuan Ming.

Research output: Contribution to journal › Article

*IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control*, pp. 352-359.

}

TY - JOUR

T1 - Nonuniform phase distribution in ultrasound speckle analysis--I

T2 - Background and experimental demonstration

AU - Weng, Li

AU - Reid, John M.

AU - Shankar, P. M.

AU - Soetanto, Kawan

AU - Lu, Xuan Ming

PY - 1992/5

Y1 - 1992/5

N2 - For Pt. II, see ibid., vol. 39, no. 3, pp. 360-365 (1992). 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 those noncircular phase distributions while changing the demodulation frequency, the mean scatterer spacing can be estimated.

AB - For Pt. II, see ibid., vol. 39, no. 3, pp. 360-365 (1992). 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 those noncircular phase distributions while changing the demodulation frequency, the mean scatterer spacing can be estimated.

UR - http://www.scopus.com/inward/record.url?scp=0026867504&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0026867504&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:0026867504

SP - 352

EP - 359

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

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

SN - 0885-3010

ER -