Fig 4. Topographical effect of craniectomy without tumor resection.

A. Field strength distributions with and without craniectomy (coronal, axial, and sagittal sections from left to right, colorbar 0–300 V/m). B. Paired difference between craniectomy and no craniectomy scenarios, i.e. Δ|E| = |E|_craniectomy—|E|_{no craniectomy}, for both electrode pairs. Leftmost panels show a rotated surface view of the region of pathology. Craniectomy produced a marked and focal increase in electrical field strength in the regions of pathology underlying the craniectomy, while healthy tissues were largely unaffected.