NDLI: Physics of ultrasound contrast imaging: scattering in the linear range

Content Provider	IEEE Xplore Digital Library
Author	Uhlendorf, V.
Copyright Year	1986
Abstract	A simple model for B-mode image formation in diagnostic ultrasound is presented. It is used to give a general description of the effects, which scattering ultrasound contrast agents have on B- or M-mode images, as long as linear propagation of ultrasound is prevailing. The results of the model calculations are illustrated for the case of a homogeneous medium. It turns out that acoustical shadowing is limiting the maximum attainable backscatter enhancement. This becomes obvious when the model is also applied to the slightly more complicated case of cardiac and especially myocardial (or tissue) contrast. Conditions for optimum enhancement are derived for a number of typical diagnostic situations. Some possible pitfalls, which may prevent good results, are also called to attention. Microbubble suspensions are discussed as an important special example for contrast agents. In this case, the limits of the linear range can be estimated from the acoustically driven pulsations of a microbubble in a viscous fluid. The properties of contrast agents in the linear range described here should also provide a basis for later discussion of their nonlinear properties, which may help to overcome limitations imposed on tissue contrast in the linear range.<>
Starting Page	70
Ending Page	79
Page Count	10
File Size	1129012
File Format	PDF
ISSN	08853010
Volume Number	41
Issue Number	1
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1994-01-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Ultrasonic imaging Physics Acoustic scattering Biomedical imaging Medical diagnostic imaging Shadow mapping Myocardium Suspensions Lungs Acoustic propagation
Content Type	Text
Resource Type	Article
Subject	Acoustics and Ultrasonics Instrumentation Electrical and Electronic Engineering

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