(a) RANDO phantom setup on Icon™ with nose marker (white arrow), immobile reflective markers (hollow arrows) and stereotactic axes indicated. (b) Cerebellar point (99.6, 66.3, 106.0)mm. (c) Left trigeminal nerve root point (117.3, 106.1, 100.7)mm. (d) Superior point (92.3, 120.6, 21.4)mm. (e) Posterior point (98.9, 51.9, 50.4)mm. (f) Anterior point (85.1, 172.2, 59.5)mm. (g) Right lateral point (53.3, 118.6, 58.0)mm. (h) Left lateral point (156.0, 102.0, 64.0)mm.