PMC9803938_01
Post-operative 1.5 T T2-weighted MRI in the axial (A), reconstructed sagittal (B), coronal planes (C) and magnified coronal (D) visualize the right lead well-placed in GPi. The ventral edge of the right 2 contact is visually estimated to be 6 mm dorsal to the ventral edge of the 0 contact (approximating the ventral border of GPi superior to the optic tract). The orange dashed line represents pre-operative optimized planned targeting well-aligned with the post-operative visualized lead in all planes. (For interpretation of the references to color in this figure legend, the reader is referred to the web version of this article.)
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Additionally, postoperative MRI confirmed that the electrodes were well-placed bilaterally (Fig. 1, Fig. 2). Measuring from the MRI-visualized distal edge of the 0 contact, the distal (ventral) edge of the 2 contact was measured at 6 mm above the stereotactic target and ventral border of GPi (Fig. 1b, d).