Image analysis – Applications – Biomedical applications
Patent
1994-12-22
1997-01-14
Johns, Andrew
Image analysis
Applications
Biomedical applications
382168, 382261, G06K 940
Patent
active
055948073
ABSTRACT:
An interrogation region, such as a portion of a patient's body, is imaged as an unfiltered pattern of image elements, to each of which is assigned a numerical value such as brightness. One element is selected either automatically or manually as a reference element, which lies in a substantially homogeneous image portion. For ultrasonic imaging, the homogeneous portion preferably corresponds to a region of speckle noise. A reference histogram of the numerical values is then accumulated for all the elements in a region or window about the reference element. All of the remaining elements are sequentially designated as current elements, for each of which a current histogram is accumulated. Each current histogram is compared with the reference histogram using an error function for each corresponding pair of histogram bins. The error function values for all bins, which may be normalized and weighted, are used to generate a similarity value between the current and reference histograms. The more similar to the reference histogram the current histogram is, the more strongly it is assumed that the current element lies in a homogeneous portion of the image, and the greater it is smoothed. All possible error function values may be prestored to increase computation speed. The degree of smoothing may be adjusted by the user. The user preferably also may adjust a comparison factor, which determines how strongly a difference between a current and a reference bin will contribute to the similarity value.
REFERENCES:
patent: 4729019 (1988-03-01), Rouvrais
patent: 4783839 (1988-11-01), Bamber
patent: 5050226 (1991-09-01), Collet-Billon
"Acoustic Attenuation Estimation for Soft Tissue from Ultrasound Echo Envelope Peaks," Ping He, IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, vol. 36, No. 2, pp. 197-203, 1989.
"Application of stochastic analysis to ultrasonic echoes--Estimation of attenuation and tissue heterogeneity from peaks of echo envelope," Ping He & James F. Greenleaf, J. Acoust. Soc. Am., vol. 79(2), pp. 526-534, Feb. 1986.
"Rational Gain Compensation for Attenuation in Cardiac Ultrasonography," Hewlett Melton & David Skorton, Ultrasonic Imaging, 5, pp. 214-228, 1983.
"Quantitative Volume Backscatter Imaging," Matthew O'Donnell, IEEE Transactions on Sonics and Ultrasonics, vol. 30, No. 1, pp. 26-36, 1989.
"Attenuation measurement uncertainties caused by speckle statistics," Kevin Parker J. Acoust. Soc. Am., vol. 80(3), pp. 727-734, Sep. 1986.
"Estimation of Local Attenuation from Multiple Views Using Compensated Video Signals," K. J. Peters, et al., Acustica, vol. 79, pp. 251-258, 1993.
"Adaptive Time Gain Compensation for Ultrasonic Imaging," S. D. Pye, et al., Ultrasound in Med. & Biol., vol. 18, No. 2, pp. 205-212, 1992.
Bamber, et al., "Fast image processing systems for evaluating the clinical potential of ultrasound speckle suppression and parametric imaging," SPIE vol. 1092, Medical Imaging III: Image Processing, pp. 33-39, 1989.
Bamber & Daft, "Adaptive filtering for reduction of speckle in ultrasonic pulse-echo images," Ultrasonics, pp. 41-44, 1986.
Bamber & Daft, "Intelligent Filtering for the Suppression of Speckle in Ultrasonic Pulse-Echo Images," WFUMB 1985, p. 545.
Bleck, et al., "Intelligent two-dimensional filter in the diagnosis of diffuse and focal liver disease," AIUM, 1991.
Huang, et al., "A Fast Two-Dimensional Median Filtering Algorithm," IEEE Transactions on Acoustics, Speech, and Signal Processing, vol. ASSP-27, No. 1, pp. 13-17, Feb. 1979.
Kuc, "Ultrasonic Tissue Characterization Using Kurtosis," IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, vol. UFFC-33, No. 3, pp. 273-279, May 1986.
Loupas, et al., "An Adaptive Weighted Median Filter for Speckle Suppression in Medical Ultrasonic Images," IEEE Transactions on Circuits and Systems, vol. 36, No. 1, pp. 129-135, Jan. 1989.
Magnin, et al., "Frequency Compounding for Speckle Contrast Reduction in Phased Array Images," Ultrasonic Imaging 4, pp. 267-281, 1982.
Thijssen, et al., "Gray Level Transforms and Lesion Detectability in Echographic Images," Ultrasonic Imaging 10, pp. 171-195, 1988.
Trahey, et al, "Speckle Pattern Correlation with Lateral Aperture Translation: Experimental Results and Implications for Spatial Compounding,", IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, vol. UFFC-33, No. 3, pp. 257-264, May 1986.
Tuthill, et al., "Deviations from Rayleigh Statistics in Ultrasonic Speckle," Ultrasonic Imaging 10, pp. 81-89, 1988.
Johns Andrew
Siemens Medical Systems Inc.
Slusher Jeffrey
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