Methods of image filtering in the x-ray computed tomography

The essential part of the computation connected with creation of the image of KT belongs to abbreviation of number and deleting artifacts in the medical X-ray computer tomography (CT).Theoretically, any artifact of the image can be defined as any distinction between the reconstructed values of the image and the true attenuation coefficients of object. Though this determination is rather wide to cover almost all types of imperfect images, it has small practical value because almost each image received from the KT scanner contains “artifacts” by this determination.Systematization of methods of filtering of artifacts and images noises in relation to CT images is carried out, their filtering qualities are considered, the most significant methods and their combinations for CT are defined, algorithms and programs for combined (composite) methods of filtering are developed and their application in CT software is realized.