Purpose: To determine the extent to which the accuracy of magnetic resonance imaging (MRI) basedvirtual 3-dimensional (3D) models of the intact orbit can approach that of the gold standard, computedtomography (CT) based models. The goal was to determine whether MRI is a viable alternative to CT scansin patients with isolated orbital fractures and penetrating eye injuries, pediatric patients, and patients requiringmultiple scans in whom radiation exposure is ideally limited.Materials and Methods: Patients who presented with unilateral orbital fractures to the Royal BrisbaneandWomen’s Hospital from March 2011 to March 2012 were recruited to participate in this cross-sectionalstudy. The primary predictor variable was the imaging technique (MRI vs CT). The outcome measurementswere orbital volume (primary outcome) and geometric intraorbital surface deviations (secondary outcome)between the MRI- and CT-based 3D models.Results: Eleven subjects (9 male) were enrolled. The patients’ mean age was 30 years. On average, theMRI models underestimated the orbital volume of the CT models by 0.50 0.19 cm3. The average intraorbitalsurface deviation between the MRI and CT models was 0.34 0.32 mm, with 78 2.7% of the surfacewithin a tolerance of 0.5 mm.Conclusions: The volumetric differences of the MRI models are comparable to reported results from CTmodels. The intraorbital MRI surface deviations are smaller than the accepted tolerance for orbital surgicalreconstructions. Therefore, the authors believe that MRI is an accurate radiation-free alternative to CT forthe primary imaging and 3D reconstruction of the bony orbit.