Denoising X-ray CT images based on product Gaussian mixture distribution models for original and noise images

Combination of hybrid median filter and total variation minimisation for medical X‐ray image restoration

“…However, less radiation causes a reduced signal to noise ratio (SNR) and a loss of image sharpness. Although the main problem of CT is reconstruction, the lower SNR of the projection data (sinogram) produces a noisy reconstructed image, which is difficult to analyse [2]. Additive Gaussian noise is very common in medical images [3].…”