International Journal of Biomedical Imaging / 2015 / Article / Fig 7

Research Article

Clutter Mitigation in Echocardiography Using Sparse Signal Separation

Figure 7

Example of (a) tissue atoms and (b) clutter atoms in the obtained subdictionaries from applying MCA with a cut-off value of . The dictionary is learned using the simulated sequence echo data. The magnitude of the atoms is presented. The atoms are shown after being transformed from vectors into 2D patches and being envelope-detected. The horizontal direction refers to the temporal dimension and the vertical direction to the axial dimension.
(a) Tissue atoms
(b) Clutter atoms

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