Journal article
Nonuniform phase distribution in ultrasound speckle analysis. II. Parametric expression and a frequency sweeping technique to measure mean scatterer spacing
IEEE transactions on ultrasonics, ferroelectrics, and frequency control, v 39(3), pp 360-365
May 1992
PMID: 18267646
Abstract
For pt.I see ibid., vol.39, no.3, p.352-9 (1992). 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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13 citations in Scopus
Details
- Title
- Nonuniform phase distribution in ultrasound speckle analysis. II. Parametric expression and a frequency sweeping technique to measure mean scatterer spacing
- Creators
- L Weng - Drexel UniversityJ.M Reid - Drexel UniversityP.M Shankar - Drexel UniversityK Soetano - Drexel UniversityX.-M Lu - Drexel University
- Publication Details
- IEEE transactions on ultrasonics, ferroelectrics, and frequency control, v 39(3), pp 360-365
- Publisher
- IEEE
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Microbiology and Immunology; Electrical and Computer Engineering; School of Biomedical Engineering, Science, and Health Systems
- Scopus ID
- 2-s2.0-0026866522
- Other Identifier
- 991019183949904721