1. A method of storing data in a neurostimulation system, the method comprising: generating a first image of a patient's brain and a second image of the patient's brain, the first image generated before a plurality of electrodes are implanted within the patient's brain and the second image generated after the plurality of electrodes are implanted within the patient's brain; generating patient-specific imaging-related data indicating a location of the plurality of electrodes within the patient's brain, the patient-specific imaging-related data generated based on both of the first and second images, wherein the patient-specific imaging-related data is at least one of imaging data of the patient's brain or a transformation data set to transform a generic 3D atlas into a patient-specific 3D atlas; and storing the patient-specific imaging-related data in a portable component of the neurostimulation system, wherein the portable component is selected from the group consisting of an implantable neurostimulator coupled to the plurality of electrodes implanted within the patient's brain and an external charger for transcutaneously charging the implantable neurostimulator, wherein the portable component is either a) implanted in the patient, b) configured and arranged to be worn by the patient, or c) configured and arranged to fit in a palm of a hand of the patient.