Introduction:
Magnetic resonance imaging (MRI) is one of the high-tech diagnostic-imaging methods, popular due to non-invasiveness, painlessness and delivery of high-volume information in a short time.

Aim:
The aim of study was to analyze the prevalence of specific diagnoses and demographics of the patient population examined using MRI during 2011–2015 at the University Clinical Hospital in Olsztyn (UCH).

Material and methods:
Data from the study population (gender, age and diagnosis) were collected over a 5-year period and SPSS software was used to analyze the frequencies of descriptive variables.

Results and discussion:
This report presents data and demographic analyses generated during a 5-year utilization of the Siemens Magnetom Trio. Over this time, there were 12381 patients and 13298 visits, averaging 2660 visits per year. The scans were more commonly performed on female than male patients, 61.3% and 38.7% respectively. Patient age ranged from 2 to 92 years, and the largest group, third part of all visits, consisted of visitors between 51 and 60 years. During these 5 years, MRI diagnoses were applied in 19 out of 26 main letter-coded categories of diseases and health problems as classified by the ICD-10. More than half of all visits concerned the musculoskeletal system and connective tissue; less common, but still frequent were diseases of the nervous system; neoplasms; symptoms, signs and clinical findings not elsewhere classified; injury, poisoning and certain other consequences of external causes.

Conclusions:
This study reports on MRI utilization at the UCH, and discusses the use of MRI in the best interest of patient.