Introduction: MR has greatly improved diagnostic medicine in recent decades. By constantly changing and improving technological aspects, MR is becoming an increasingly sophisticated and refined method. By constantly tending to increase the used magnetic field, the spatial resolution and contrast increase due to the increase in SNR. These factors enable a detailed and clear presentation of previously invisible pathologies, especially pathologies in the brain The aim of the work: The aim of this work is to compare the importance of the technological features of 3T and 7T MR in brain imaging and to distinguish their advantages and disadvantages. Discussion: MR 3T is used in daily clinical practice worldwide. One of the basic questions that scientists deal with in most research is the importance of 7T compared to 3T in the presentation of various brain pathologies. It was found that the improved technological characteristics of the device with a higher magnetic field affect the better representation of epileptogenic lesions and lesions that are specific for multiple sclerosis. In addition, a better representation of the internal structure of the tumor, a better representation of aneurysms and microbleeds and changes that are characteristic of neurodegenerative diseases such as Alzheimer's disease and Parkinson's disease is obtained. It was of great importance to determine whether there is superiority of 7T in these pathologies to determine all the available possibilities, advantages and disadvantages because these are diseases that have an increasing prevalence in the population. On the MR 7T, there are also technological problems that can lead to poor recording quality, for which various solutions are proposed and investigated. Conclusion: After reviewing numerous studies, it was determined that 3T MR is a quality device for current use, but 7T has the ability to display details and can provide a higher quality image and greater diagnostic precision and can be of great importance, especially in certain patients where 3T is not detailed enough. It should be noted that 7T MR still needs to be researched, but it is safe for human use and represents the future of diagnostic medicine.