Patient 8, possible Joubert malformation. Patient 8, possible Joubert malformation. A, Coronal IR T1-weighted image (11520/60/400/2) shows rostral vermian dysgenesis (black arrowhead), bilateral abnormal arborization of the white matter (double black arrowhead), and linear heterotopia (white arrow).B, Axial T2-weighted image (5000/120/2 [TR/TE/excitations]) shows vermian dysgenesis (short arrow) associated with mega cisterna magna and prominent appearance of the superior cerebellar peduncles (long arrow). Gustavo Soto-Ares et al. AJNR Am J Neuroradiol 2000;21:1511-1519 ©2000 by American Society of Neuroradiology