Background: Ovarian masses are late symptomatic so early detection and characterization of the ovarian neoplasm is very important for adequate therapeutic procedure, this starts from the physical examination to the imaging technique and laboratory investigations. MRI show high contrast resolution so MRI gives proper detection and differentiation of benign and malignant ovarian masses by the utility of different sequences like conventional MRI imaging, To obtain anatomical data and study the different signal intensities of the ovarian lesions T1 and T2 sequences are needed, T1 SPIR to assess the hemorrhagic and fatty areas, MRI with Gadolinium enhance the MRI ability to differentiate  between benign and malignant ovarian masses, tumor staging and follow up.Diffusion-weighted imaging and proton MRI spectroscopy are a functional MRI sequences increase MRI sensitivity and specificity in diagnosis of ovarian lesions.  
Conclusion: MRI is considered solving problem imaging modality in early determine the site and characterize the ovarian masses, also it is helpful at ovarian tumor staging.