Computational and Mathematical Methods in Medicine / 2015 / Article / Fig 3

Research Article

A Model of Regularization Parameter Determination in Low-Dose X-Ray CT Reconstruction Based on Dictionary Learning

Figure 3

The difference between the reconstructed image and the original image (OI) of the human abdomen slice image. From top to bottom, the noise levels are 0.0% and 0.1% in turn. From left to right, the regularization parameters are , , and . The display window is  HU.