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

doi:10.1109/58.143170

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

Research output: Contribution to journal › Article › peer-review

12 Citations (Scopus)

Abstract

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.

Original language	English
Pages (from-to)	360-365
Number of pages	6
Journal	IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
Volume	39
Issue number	3
DOIs	https://doi.org/10.1109/58.143170
Publication status	Published - 1992 May
Externally published	Yes

ASJC Scopus subject areas

Instrumentation
Acoustics and Ultrasonics
Electrical and Electronic Engineering

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10.1109/58.143170

Cite this

Nonuniform Phase Distribution in Ultrasound Speckle Analysis—Part II: Parametric Expression and a Frequency Sweeping Technique to Measure Mean Scatterer Spacing. / Weng, Li; Reid, John M.; Shankar, P. M. et al.
In: IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, Vol. 39, No. 3, 05.1992, p. 360-365.

Research output: Contribution to journal › Article › peer-review

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abstract = "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.",

author = "Li Weng and Reid, {John M.} and Shankar, {P. M.} and Kawan Soetanto and Lu, {Xuan Ming}",

note = "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 #CA52X23-01 from the National Cancer Institute.",

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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 #CA52X23-01 from the National Cancer Institute.

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AB - 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.

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

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