NDLI: Key parameters for precise lateral displacement estimation in ultrasound elastography

Content Provider	IEEE Xplore Digital Library
Author	Jianwen Luo Konofagou, E.E.
Copyright Year	2009
Description	Author affiliation: Departments of Biomedical Engineering, Columbia University, New York, NY (Jianwen Luo; Konofagou, E.E.)
Abstract	Complementary to axial, lateral and elevational displacement and strain can provide important information on the mechanical properties of biological soft tissues. In this paper, the effects of key parameters on the lateral displacement estimation were investigated in simulations and validated in phantom experiments. The performance of the lateral estimator was evaluated by measuring its associated bias, and jitter (i.e., standard deviation). Simulation results showed that the bias and jitter undergo periodic variations depending on the lateral displacement, with a period equal to the pitch (i.e., adjacent element distance). The performance of the lateral estimation was improved, when a smaller pitch, or a larger beamwidth, was used. The effects of the pitch were found to be greater than those of the beamwidth. The results of the phantom experiments were shown in good agreement with the simulation findings, including the periodic variation of the performance with lateral displacement, effects of pitch and beamwidth. In conclusion, smaller pitches and wider beamwidths were found to be key in reducing the jitter error in the lateral displacement estimation. The same results also hold for tracking in the elevational direction.
Starting Page	4407
Ending Page	4410
File Size	463982
Page Count	4
File Format	PDF
ISBN	9781424432967
ISSN	1557170X
DOI	10.1109/IEMBS.2009.5333692
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-09-03
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Ultrasonic imaging Capacitive sensors Imaging phantoms Acoustic scattering Jitter Frequency Motion estimation Biological tissues Sampling methods Ultrasonic transducers Ultrasound elastography Beamwidth Bias Pitch
Content Type	Text
Resource Type	Article
Subject	Signal Processing Biomedical Engineering Health Informatics Computer Vision and Pattern Recognition

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