Adaptively Tuned Iterative Low Dose CT Image Denoising

Figure 2

Noise statistics of the soft tissue region surrounding the lung. (a) Top: the thoracic phantom which is used to evaluate the noise characteristics and bottom: the soft tissue region of the phantom (denoted by in Algorithm 1). (b) The statistical distribution of the noise in the soft tissue region is shown by the blue experimental values and these are compared with Gaussian distribution with the same variance (red dashed line).

(a)

(b)