 There is marked dilatation of the lateral ventricles with absence of septum pellucidum. The ventricular size is unchanged since the previous study. The cerebral aqueduct is not well visualized and most likely stenosed. The floor of the third ventricle is thin in some areas, but no clear evidence of a gap or perforation is seen, similar to prior. The positioning of the sagittal CSF flow sequence is slightly to the right of the midline of the third ventricle. Given flow imaging was acquired as a 10 mm imaging slab, however, the midline is probably covered. Given this, no flow is detected across the floor of the third ventricle, also similar to prior.
1. Unchanged size of the ventricles since previous study.2. No flow detected across of the floor of the third ventricle. No evidence to indicate patent ventriculocisternostomy.