Department of Mathematics and Computing, Universidad de Oriente, Santiago de Cuba, Cuba;
Medical Exposure Department, Public Health England (PHE), Chilton, UK;
Radiation Medical Physics Group, Centre of Medical Biophysics, Universidadde Oriente, Santiago de Cuba, Cuba;
Universidad Central Marta Abreu, Santa Clara, Cuba;
CT; Nonlinear; Noise; Model; Beam; Hardening; Effect; Image; Processing; Filters; Effect;