## 抄録

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.

本文言語 | English |
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ページ（範囲） | 352-359 |

ページ数 | 8 |

ジャーナル | IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control |

巻 | 39 |

号 | 3 |

DOI | |

出版ステータス | Published - 1992 5月 |

外部発表 | はい |

## ASJC Scopus subject areas

- 器械工学
- 音響学および超音波学
- 電子工学および電気工学