Contrast-enhanced computer tomography (CT) is considered the «gold standard» for assessing residual liver volume in planning surgical treatment of tumor pathology. However, in recent years, magnetic resonance tomography (MRT) with hepatotropic contrast substance (HCS) has become an integral part of liver tumor diagnosis. Therefore, the study aims to explore the possibilities of preoperative MR volumetry using HCS compared to CT volumetry in patients with primary and secondary liver tumor lesion Objective. To study the possibilities of preoperative MR volumetry using HCS in comparison with CT volumetry of the liver in patients with primary and secondary tumor lesions of the liver Material and methods. Data from 46 patients with primary and secondary liver neoplasms were analyzed. A comprehensive assessment of the planned residual liver volume was performed using MRT with HCS and CT with multiphase contrast at the preoperative stage. Results. According to the statistical analysis, liver volumetric indicators from MRT with HCS and CT showed a direct correlation with significantly high correlation between variables and a significance level of p<0.005. Conclusion. MRT with HCS has equivalent accuracy in assessing residual liver volume compared to CT volumetry and can be used as an alternative method in planning extensive liver resections. © 2024, Media Sphera Publishing Group. All rights reserved.