MRI - 1.5T MRI 8 days after symptoms onset
Sagittal T1
Axial T2
Axial Gradient Echo
Axial DWI
Axial ADC
Coronal FLAIR
Linear low-intensity vascular structures at T2* gradient echo and high intensity at T1 images reflecting dilated and thrombosed veins. Note "caput medusae" appearance. Subarachnoid blood in basal cisterns as well as ventricles and other CSF cisterns (Fisher 4 SAH).
Low-intensity lines in the pons as well as inhomogeneous diffuse signal increase, consistent with vasogenic oedema. Inhomogeneous, low and slightly high signal intensity at b=1000 DWI images in the pons. No restricted diffusion found, which is consistent with vasogenic oedema and explains high signal at b=1000 as T2 shine through.
Early signs of hydrocephalus are also present: dilated 3rd ventricle, lower displacement of its bottom and dilated temporal horns.