Goal: The aim of the study is to examine the patients' knowledge of informed consent or approval in relation to signing, pre-information, understanding information about examination and all circumstances about informed consent for magnetic resonance imaging and computer tomography. Methods: The examination was conducted by a patient questionnaire after the patient has fulfilled the consent for magnetic resonance imaging and computer tomography. It was performed at the Clinical Institute of Radiology, KBC Rijeka in the period from 01.05. 2018 to 30.05. 2018. The survey contained five basic questions related to informed consent of the patient. 60 patients were examined and 93.33% respondents successfully surveyed, 3.33% respondents refused interviewing and 3.33% respondents were unable to respond to the survey due to bed health conditions. Results: Statistically, 56 patients were interviewed and 55.35% replied that they are familiar with the concept of informed consent, while 12.50% the respondents have some knowlege about it and 32.14% respondents were unaware of the notion of informed consent. In further questionnaires it is of paramount importance that patients are not well acquainted with the recommended examination by a physician who sent them to the examination because of the 56 respondents, 44.64% subjects received the information about the examination by the physician, 16.07% respondents were informing themselves on the internet independently and 39.28 % of the respondents did not know about the examination or the manner of conducting the examination. Conclusion: It is immensely important that the patient gets all the knowledge about the recommended radiological examination as well as the procedure for conducting the examination, also they have the right to be involved in the decision about his health and he must be informed during the process of signing the consent for the examination. Health care workers are obliged to take care of the patient's goodwill, they also have to worry about the patient's autonomy and make decisions that are in the patient's interest. According to the above mentioned at the Clinical Institute of Radiology Rijeka, measures are being implemented to inform the patients how medical examination was performed as well as the right of the patient to reject specified examination.