Please use this identifier to cite or link to this item: http://hdl.handle.net/1783.1/57449

On Feature Motion Decorrelation in Ultrasound Speckle Tracking

Authors Liang, Tianzhu HKUST affiliated (currently or previously)
Yung, Ling Sing HKUST affiliated (currently or previously)
Yu, Weichuan View this author's profile
Issue Date 2013
Source IEEE Transactions on Medical Imaging , v. 32, (2), 2013, article number 6362227, p. 435-448
Summary Speckle tracking methods refer to motion tracking methods based on speckle patterns in ultrasound images. They are commonly used in ultrasound based elasticity imaging techniques to reveal mechanical properties of tissues for clinical diagnosis. In speckle tracking, feature motion decorrelation exists when speckle patterns are not identical before and after tissue motion and deformation. Feature motion decorrelation violates the underlying assumption of most speckle tracking methods. Consequently, the estimation accuracy of current methods is greatly limited. In this paper, two types of speckle pattern variations, the geometric transformation and the intensity change of speckle patterns, are studied. We show that a coupled filtering method is able to compensate for both types of variations. It provides accurate strain estimations even when tissue deformation or rotation is extremely large. We also show that in most cases, an affine warping method that only compensates for the geometric transformation is able to achieve a similar performance as the coupled filtering method. Feature motion decorrelation in B-mode images is also studied. Finally, we show that in typical elastography studies, speckle tracking methods without modeling local shearing or rotation will fail when tissue deformation is large.
Subjects
ISSN 0278-0062
1558-254X
Language English
Format Article
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