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Objective: To evaluate tools for the fusion of images generatedby tomography and structural and functional magnetic resonanceimaging. Methods: Magnetic resonance and functional magneticresonance imaging were performed while a volunteer who hadpreviously undergone cranial tomography performed motor andsomatosensory tasks in a 3-Tesla scanner. Image data were analyzedwith different programs, and the results were compared. Results:We constructed a flow chart of computational processes that allowedmeasurement of the spatial congruence between the methods. Therewas no single computational tool that contained the entire set offunctions necessary to achieve the goal. Conclusion: The fusion ofthe images from the three methods proved to be feasible with the useof four free-access software programs (OsiriX, Register, MRIcro andFSL). Our results may serve as a basis for building software that willbe useful as a virtual tool prior to neurosurgery.