Master’s Thesis Radiation protection in CT examinations is written in the form of a review article that analyzes the accepted and established and emphasizes modern methods of radiation protection in the field of computed tomography. The Introduction describes the accelerated development of MSCT technology and the increase in its use, which has been continuous for almost two decades. Then, the main facts about radiation protection are clarified and the basic concepts related to radiation dose measurement are defined. Furthermore, the biological impact of the dose range radiation generated when performing the MSCT test is described in order to provide the reader with knowledge about the harmful effects of ionizing radiation and thus the importance of its reduction. The most important MSCT parameters that affect the radiation dose are listed and processed, with which all employees involved in medical irradiation of the population should be familiar - tube voltage, tube current and exposure time, beam collimation, slice width, scan range and significance of precise positioning of the patient. Optimization strategies for reducing the patient's radiation dose in MSCT examinations indicate the possibilities of clinical application of dose reduction techniques. On the one hand, the methods implemented in the device by the manufacturer are listed, and on the other hand it is explained how careful manual adaptation of imaging parameters can lead to a significant reduction of patient exposure if the operator has the knowledge, ability and desire to apply them.