The application of ionized radiation has become an integral part in the field of medicine specially for diagnosis and treatment purposes. We have to be very cautious when using this kind of radiation due to its hazards on people. CT scan computers use more than 34% of the counted dosages for diagnosis when using x-rays across the world UNSCER 2000. These amounts of dosages may lead to many types o diseases because computer CT scanning may result in big amounts of dosages compared with the traditional x-rays. For instance, the application of CT scanning on someone's chest may produce a dose that which is equivalents to 400 images on someone's chest when is (smsv), applying traditional x-rays. Therefore, protection from radiation is essential and as a result there are many ways to help achieve high levels of safety and protection from radiation there are some hazards resulted from the use of CT scanning, for instance, some complications are due to the injection of dye substances in veins on some patients who have allergy to iodine. Also, radiation protection inside the CT scanning unit is of a great value due to its remarkable utilization for diagnosis and treatment and the use of big amounts of radiation may lead alone to almost 50% of the overall exposure that is resulted from the source of artificial radiation according to the National council for radiation protection in 2009.