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231223s2010 xx |||||o 00| ||eng c |
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|a 10.1109/TUFFC.2010.1737
|2 doi
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|a eng
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| 100 |
1 |
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|a Shen, Yi-Ting
|e verfasserin
|4 aut
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| 245 |
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|a Computational models of distributed aberration in ultrasound breast imaging
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|c 2010
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
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|2 rdamedia
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|a ƒa Online-Ressource
|b cr
|2 rdacarrier
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| 500 |
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|a Date Completed 29.03.2011
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|a Date Revised 15.12.2010
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|a published: Print
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|a Citation Status MEDLINE
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|a Two methods for simulation of ultrasound wavefront distortion are introduced and compared with aberration produced in simulations using digitized breast tissue specimens and a conventional multiple time-shift screen model. In the first method, aberrators are generated using a computational model of breast anatomy. In the second method, 10 to 12 irregularly shaped, strongly scattering inclusions are superimposed on the multiple-screen model to create a screen-inclusion model. Linear 2-D propagation of a 7.5-MHz planar, pulsed wavefront through each aberrator is computed using a first-order k-space method. The anatomical and screen-inclusion models reproduce two characteristics of arrival-time fluctuations observed in simulations using the digitized specimens that are not represented in simulations using the multiple-screen model: non-Gaussian first-order statistics and sharp changes in the rms arrival-time fluctuation as a function of propagation distance. The anatomical and screen-inclusion models both produce energy- level fluctuations similar to the digitized specimens, but the anatomical model more closely matches the pulse-shape distortion produced by the specimens. Both aberration models can readily be extended to 3-D, and the screen-inclusion model has the advantage of simplicity of implementation. Both models should enable more rigorous evaluation of adaptive focusing algorithms than is possible using conventional time-shift screen models
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|a Journal Article
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| 650 |
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|a Research Support, Non-U.S. Gov't
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| 700 |
1 |
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|a Daoud, Mohammad I
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Lacefield, James C
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t IEEE transactions on ultrasonics, ferroelectrics, and frequency control
|d 1986
|g 57(2010), 12 vom: 15. Dez., Seite 2627-36
|w (DE-627)NLM098181017
|x 1525-8955
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|g volume:57
|g year:2010
|g number:12
|g day:15
|g month:12
|g pages:2627-36
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|u http://dx.doi.org/10.1109/TUFFC.2010.1737
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