Nonuniform Phase Distribution in Ultrasound Speckle Analysis—Part II: Parametric Expression and a Frequency Sweeping Technique to Measure Mean Scatterer Spacing

Li Weng, John M. Reid, P. M. Shankar, Kawan Soetanto, Xuan Ming Lu

研究成果: Article査読

11 被引用数 (Scopus)

抄録

The existence of regularly spaced scatterers in the range cell of an ultrasonic imaging system results in speckle with a nonuniform phase distribution. Characteristic phase distributions occur at those particular demodulator frequencies at which the spacing is a multiple of one-quarter wavelength. A demodulator frequency sweeping technique for scatterer spacing estimation has been developed that uses parametric expressions of the phase statistics to detect and to identify scatterers with regular spacings. Changes in these parameters separately identify the mean scatterer spacing when it is an even and an odd multiple of the quarter wavelength of the demodulator frequency. This technique has good tolerance for variations in mean scatterer spacing, and has real-time implementation capability.

本文言語English
ページ(範囲)360-365
ページ数6
ジャーナルIEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
39
3
DOI
出版ステータスPublished - 1992 5
外部発表はい

ASJC Scopus subject areas

  • Instrumentation
  • Acoustics and Ultrasonics
  • Electrical and Electronic Engineering

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