The book from the popular series "Secrets of Medicine," created under the guidance of well-known American radiologists, at the modern level outlines the basic principles and physical foundations of computed tomography, as well as the possibility of its application in the diagnosis of diseases of the chest, abdominal cavity, retroperitoneal space and pelvis. The publication uses a user-friendly principle of presentation (question-answer), it is well illustrated, each chapter highlights key points that need to be paid special attention to.