In the chest, there are vital anatomical structures that are necessary for the functioning of the organism. Conventional radiography is an old diagnostic radiologic method. It is used in several organic systems that besides morphology also show a function, for example in intravenous urography. Like in any medical examination, for any examination patient needs to have a valid indication. There are a lot of methods, either invasive or non-invasive, for the examination of the thoracic organs, because the chest is anatomically complex. It includes lungs, heart, soft tissue, bone structure, part of digestive tubes. However, the most used image of the thoracic organs is the X-ray of the heart and lungs, that is, more precisely, the sumative of the thoracic organs. In addition to conventional x-ray radiography, ultrasound, angiography, radionuclide diagnostics, CT and MR are used, but the search algorithm should be respected if valid diagnoses can only be made on the basis of x-rays. Each examination has certain benefits depending on the diagnosis. Moreover, CT angiography is used for visualization of blood vessels, ultrasound for some blood spill. PET / CT has similar indications as CT, but it unifies the technical characteristics of both examinations. Magnetic resonance is not yet a widespread method because it is not in big use, but for magnetic resonances is most important advantage that there is no ionizing radiation. The work of the radiological technologist is a professional approach to the patient during the exam. The radiological technologist should make his work following the instructions. Every exam should perform on the principle of less harm for the patient, less radiation for the more profit. When performing ionizing radiation, it is imperative to put protection on the patient, like protective aprons. It is important to pay special attention to women at a generational age and to confirm that they are not pregnant, because exposure to radiation causes the harm of the fetus. In addition to protecting the patient, radiological technologists must also carry their protection and follow the dosimetry device they are required to carry, and which are controlled monthly.