Congenital heart disease (CHD) is a group of big structural anomalies which are present from the birth and are most common anomalies in newborns. Due to development of medicine and improvements in operative techniques, perioperative care and better understanding of CHD, the possibility of treating these anomalies is greater and more than 85% of children are expected to reach adulthood. That emphasizes the importance of quality diagnostic processing and indicates the need for long-term monitoring of these patients. The most commonly used method in this area is still echocardiography. It is extremely suitable due to its low price, speed, non-invasiveness and harmlessness, as well as the possibility of implementation in the clinic itself. However, this method has a number of limitations, so in many cases more complex methods must be used to adequately assess the condition, such as computed tomography (CT) and magnetic resonance (MR). MR imaging is a non-invasive diagnostic method that has an increasingly important place in the diagnosis, follow-up and treatment planning of patients with CHD. Due to the absence of ionizing radiation, and at the same time excellent display with the ability to characterize tissue, assess cardiac function and hemodynamics, it is the gold standard for assessing ventricular function, volume and flow, but also an excellent method for assessing other parameters and in general for complete heart evaluation in patients with CHD. CT is a non-invasive method that, due to the existence of ionizing radiation, is less commonly used in this group of patients. Nevertheless, in some cases it has an advantage over other methods and is used in cases of contraindication to MR, the presence of metal foreign bodies or pacemakers/defibrillators, the need for rapid diagnosis in unstable patients and to display small structures such as coronary arteries. This paper provides an overview of radiological methods that play a role in the diagnostic algorithm of PSG with emphasis on MR and CT and a comparison of their advantages and disadvantages on the example of the most common PSG.