[Radiation-exposure studies of CT diagnosis with the standard and spiral technics]

Comparison of the radiation exposure during CT quoted in the literature shows considerable variation; this depends on differences in apparatus, methods of examination and measurements. A systematic investigation into radiation dose during CT is therefore necessary to obtain accurate radiation doses during various examinations in order to balance risks against usefulness. The present paper deals with the radiation dose received by the patient during examinations of the cerebrum, neck, thorax, upper and lower abdomen and pelvis, using standard and spiral CT techniques. Organ doses for all organs at risk, surface dose, total body dose and dose profiles along the body axis for each type of examination have been established, which will allow the user to evaluate radiation dose.