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PTT target lesion sub-units (ICL ≥26mm) (gray circles) on preoperative MR images. (A) axial scan centered on the intercommissural plane (DV0). ICL is the distance between the center of the anterior (ac) and posterior (pc) commissures. The mid-commissural line (mcl) is represented as dotted line. (B) mid-sagittal scan onto which target lesion sub-units 1 to 7 (ICL ≥26mm) are projected.
