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231224s2012 xx |||||o 00| ||eng c |
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|a 10.1109/TUFFC.2012.2357
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|a eng
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|a Osmanski, Bruno-Felix
|e verfasserin
|4 aut
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|a Aberration correction by time reversal of moving speckle noise
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|c 2012
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|a Text
|b txt
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|a ƒaComputermedien
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|a Date Completed 02.01.2013
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|a Date Revised 25.07.2012
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|a published: Print
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|a Citation Status MEDLINE
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|a Focusing a wave through heterogeneous media is an important problem in medical ultrasound imaging. In such aberrating media, in the presence of a small number of point reflectors, iterative time reversal is a well-known method able to focus on the strongest reflector. However, in presence of speckle noise generated by many non-resolved scatterers, iterative time reversal alone does not work. In this paper, we propose the use of the echoes coming from moving particles in a flow, such as red blood cells, to generate a virtual point reflector by iterative time reversal. The construction of the virtual point reflector is performed by a coherent addition of independent realizations of speckle coming from moving particles. After focusing on a virtual point reflector, ultrasound images can be locally corrected inside an isoplanatic patch. An application for the correction of power Doppler images is presented. A theoretical analysis shows that this iterative method allows focusing on the point of maximal insonification of the uncorrected beam
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|a Journal Article
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|a Montaldo, Gabriel
|e verfasserin
|4 aut
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|a Tanter, Mickaël
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Fink, Mathias
|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 59(2012), 7 vom: 01. Juli, Seite 1575-83
|w (DE-627)NLM098181017
|x 1525-8955
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|g volume:59
|g year:2012
|g number:7
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|g month:07
|g pages:1575-83
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