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;