DBS Electrode Positioning Accuracy in the STN & GPi with Intraoperative MR Guidance

Alastair Martin¹, Paul Larson¹, Geoffrey Bates², Philip Starr¹

MR guided DBS electrode implantation is evaluated in a series of patients with Parkinsons disease and dystonia. Both the STN and GPi are targeted and a novel optimized implantation system is employed. Targeting accuracies of 0.70.4mm were achieved when targeting both the STN and GPi and only a single brain penetration was necessary in 97% of electrodes implanted. There was no demonstrable bias in the direction of the error with either target. The achieved results with the optimized system are shown to exceed those obtained with our initial DBS implantation approach.