Fig. 116: Frontoparietal cortex, horizontal section. On both sides, three vertical, virtually acellular, parallel, brighter «marker» stripes are visible in the cortex, 30 days after parasagittal microplanar irradiation. The central cortical area situated between the «marker» triplets appears normal by light microscopy, although six equidistant, parasagittal planes were irradiated in this area with a nominal head-entrance absorbed "test" dose of 342 Gy each.