A method for imaging the brain of a living patient includes creating and displaying an unconstrained 3D virtual reality image of the brain of the living patient based on a plurality of 3D images captured by magnetic resonance imaging (MRI). An administration of a drug is simulated into brain tissue. The simulation includes displaying a simulated diffusion of the drug in 3D VR image of the brain； displaying simulated brain tissue uptake of the drug in the 3D VR image of the brain； displaying a simulated stimulation of individual neurons in the 3D VR image of the brain； and analyzing a simulated activity of the individual neurons based on at least one predetermined property of the drug. The method further includes determining a brain treatment protocol based at least in part on the simulated administration of the drug into the brain.
