Retrospective, Non-significant Risk, Deep Brain Stimulation (DBS) Care Management Software Feasibility Study

Inclusion Criteria: * Patient with Medtronic Deep Brain Stimulation therapy for idiopathic levodopa responsive Parkinson's Disease * Patient who has had lead placement in the Subthalamic nucleus * Patient with pre-op MRI available * Patient with post-op CT scan available showing placement of the lead * Patient who has documented improvement of at least 35% on UPDRS III scores from baseline preoperative off medication state compared to post DBS implant stimulation on/medications off Exclusion Criteria: * Patient who has had clinically significant persistent stimulation related adverse effects * Patient who has evidence of lead migration without lead revision * Patient with other brain malformations that would make it difficult to process images (ablative surgery in the basal ganglia, resective surgery, brain tumor)