Superficial Siderosis of the Central Nervous System Induced by a Single-Episode of Traumatic Subarachnoid Hemorrhage: A Study Using MRI-Enhanced Gradient Echo T2 Star-Weighted Angiography
Figure 1
An MRI performed on a healthy subject using spin-echo T1-weighted imaging.
We obtained axial slices of the normal brain. The anatomical structures of the subarachnoid space were labeled according to the following method. The subarachnoid area of each cerebral hemisphere was divided into 5 regions (frontal lobe, temporal lobe, occipital lobe, parietal lobe, and Sylvian fissure), and the subarachnoid areas of the cerebellum and the brainstem were divided into two relatively independent regions. Then, the number of regions, ranging from 0 to 12, of the subarachnoid area of the entire brain, excluding the ventricular system, was determined.