NDLI: P2F-8 Performance Comparison of Attenuation Estimation Techniques

Content Provider	IEEE Xplore Digital Library
Author	Hyungsuk Kim Varghese, T.
Copyright Year	2006
Description	Author affiliation: Dept. of Med. Phys., Wisconsin-Madison Univ., Madison, WI (Hyungsuk Kim; Varghese, T.)
Abstract	Ultrasound attenuation measurements in soft tissue is important both for the clinical diagnosis of various pathological conditions as well as for further analysis of ultrasound B-mode images artifacts such as shadowing and enhancement. In this paper, we present a new method for estimating local attenuation coefficients using spectral cross-correlation between consecutive power spectra obtained from the backscattered radiofrequency echo signals at different depths. Since the spectral cross-correlation method estimates the spectral shift by comparing the entire power spectra, it is more robust and stable to the noise artifacts in the backscattered radiofrequency signals. We compare the attenuation estimation performance of spectral cross-correlation to the centroid downshift, and reference phantom methods reported in the literature. Ultrasound simulations that incorporate variations in the transducer dependent parameters and backscatter properties of tissue are utilized to compare the accuracy and precision of each method. Simulation results demonstrate that the estimation accuracy of the reference phantom and spectral cross-correlation methods are better than the centroid downshift method in uniform backscatter regions. However, as backscatter properties change along the beam propagation path, the reference phantom method fails to estimate attenuation coefficients at the boundaries where the backscatter changes occur while the spectral cross-correlation and centroid downshift are fairly independent of backscatter variations. Experimental results using tissue mimicking phantoms also illustrate that the spectral cross-correlation method is more robust towards changes in tissue backscatter properties
Starting Page	1722
Ending Page	1725
File Size	266317
Page Count	4
File Format	PDF
ISBN	1424402018
ISSN	10510117
DOI	10.1109/ULTSYM.2006.434
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2006-10-02
Publisher Place	Canada
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Backscatter Imaging phantoms Ultrasonic imaging Radio frequency Attenuation measurement Biological tissues Clinical diagnosis Pathology Image analysis Shadow mapping
Content Type	Text
Resource Type	Article

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