Reducing Noises and Artifacts Simultaneously of Low-Dosed X-Ray Computed Tomography Using Bilateral Filter Weighted by Gaussian Filtered Sinogram
Figure 3
Shoulder CT images of a 60-year-old man. (a) Original SDCT image acquired at a standard tube current-time product 135 mAs. (b) Original LDCT image acquired at a reduced tube current-time product 35 mAs. (c, f, g, h) LDCT images processed by BF, context, MBF, and MRBF, respectively. (d) LDCT image processed by WIA-LN. Note that both the streak artifacts and informative human tissues tend to be smoothed. (e) LDCT image processed by the proposed method. Compared to the original LDCT images in (a), the obvious improvement of noise suppression in the improvement of preservation of the subscapular arteries (white circles) for the proposed method can be observed.
