Fig 9. Topographical effect of craniectomy for a deeply seated tumor.

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 surface view of the region of pathology. Craniectomy caused no considerable changes in electrical field strength in the regions of pathology, but rather induced a significant increase in field strength in the healthy tissues immediately underlying the skull defect.