1. A computer-implemented anatomical modeling system comprising: a processor configured to: import from an external system at least one medical image associated with a patient; display one or more of the at least one medical image; generate a patient-specific anatomical model that outlines anatomical structures based on the at least one medical image; display the patient-specific anatomical model; and display, overlying the patient-specific anatomical model that was generated based on the at least one medical image, a graphical representation of at least one of: a leadwire that is (a) implanted into an anatomical region of the patient that is modeled by the anatomical model, and (b) configured for stimulating tissue in the anatomical region; and a volume of tissue estimated by the processor to be activated by the implanted leadwire; wherein: the imported at least one medical image was generated prior to the implantation of the leadwire; and the displayed anatomical model and the displayed one or more of the at least one medical image are displayed overlying each other so that the outlines of the anatomical model outline the anatomical structures within the display of the one or more of the at least one medical image.