Improving Spatial Adaptivity of Nonlocal Means in Low-Dosed CT Imaging Using Pointwise Fractal Dimension

<table class="table-group" width="800px"><tr class="fig-image" id="a"><td><img alt="902143.fig.003a" src="https://static.hindawi.com/articles/cmmm/volume-2013/902143/figures/902143.fig.003a.jpg"/></td></tr><tr class="fig-caption"><td align="center"><table><tr><td><b>(a) </b> Original SDCT image with tube current time product 150 mAs</td></tr></table></td></tr><tr class="fig-image" id="b"><td><img alt="902143.fig.003b" src="https://static.hindawi.com/articles/cmmm/volume-2013/902143/figures/902143.fig.003b.jpg"/></td></tr><tr class="fig-caption"><td align="center"><table><tr><td><b>(b) </b>Original LDCT image with tube current time product 60 mAs</td></tr></table></td></tr><tr class="fig-image" id="c"><td><img alt="902143.fig.003c" src="https://static.hindawi.com/articles/cmmm/volume-2013/902143/figures/902143.fig.003c.jpg"/></td></tr><tr class="fig-caption"><td align="center"><table><tr><td><b>(c) </b>Reconstructed image from (b) using NLMs</td></tr></table></td></tr><tr class="fig-image" id="d"><td><img alt="902143.fig.003d" src="https://static.hindawi.com/articles/cmmm/volume-2013/902143/figures/902143.fig.003d.jpg"/></td></tr><tr class="fig-caption"><td align="center"><table><tr><td><b>(d) </b>Reconstructed image from (b) using PWBCD-NLMs</td></tr></table></td></tr></table>

<table>(b) Real LDCT reconstructed image, (a) related SDCT reconstructed images and (c)-(d) reconstructed images from LDCT sinogram using NLMs and the new method.  </table>

Computational and Mathematical Methods in Medicine

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Figure 3

Figure 3: Improving Spatial Adaptivity of Nonlocal Means in Low-Dosed CT Imaging Using Pointwise Fractal Dimension 