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231224s2015 xx |||||o 00| ||eng c |
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|a 10.1109/TUFFC.2015.007133
|2 doi
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|a pubmed24n0839.xml
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|a eng
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| 100 |
1 |
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|a Kuzmin, Andrey
|e verfasserin
|4 aut
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|a Multi-frame elastography using a handheld force-controlled ultrasound probe
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|c 2015
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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
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|2 rdacarrier
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| 500 |
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|a Date Completed 12.05.2016
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| 500 |
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|a Date Revised 25.11.2016
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|a published: Print
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|a Citation Status MEDLINE
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|a We propose a new method for strain field estimation in quasi-static ultrasound elastography based on matching RF data frames of compressed tissues. The method benefits from using a handheld force-controlled ultrasound probe, which provides the contact force magnitude and therefore improves repeatability of displacement field estimation. The displacement field is estimated in a two-phase manner using triplets of RF data frames consisting of a pre-compression image and two post-compression images obtained with lower and higher compression ratios. First, a reliable displacement field estimate is calculated for the first post-compression frame. Second, we use this displacement estimate to warp the second post-compression frame while using linear elasticity to obtain an initial approximation. Final displacement estimation is refined using the warped image. The two-phase displacement estimation allows for higher compression ratios, thus increasing the practical resolution of the strain estimates. The strain field is computed from a displacement field using a smoothness- regularized energy functional, which takes into consideration local displacement estimation quality. The minimization is performed using an efficient primal-dual hybrid gradient algorithm, which can leverage the architecture of a graphical processing unit. The method is quantitatively evaluated using finite element simulations. We compute strain estimates for tissue-mimicking phantoms with known elastic properties and finally perform a qualitative validation using in vivo patient data
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|a Journal Article
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| 700 |
1 |
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|a Zakrzewski, Aaron M
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Anthony, Brian W
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Lempitsky, Victor
|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 62(2015), 8 vom: 16. Aug., Seite 1486-500
|w (DE-627)NLM098181017
|x 1525-8955
|7 nnns
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| 773 |
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|g volume:62
|g year:2015
|g number:8
|g day:16
|g month:08
|g pages:1486-500
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| 856 |
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|u http://dx.doi.org/10.1109/TUFFC.2015.007133
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