Prevalence of Anatomical Variants of Dural Sinuses by MRV Evaluation in Sohag

Inclusion Criteria: * Sohag by nationality and residence, male or female by sex, having normal cerebral MRV reported and consented to participate in the research work will be included in this research. Exclusion Criteria: * Having the diagnosis of cerebral venous sinus thrombosis, congential or acquired intracranial abnormalities, ischemic or hemorrhagic stroke, intracranial hypertension, intracranial space occuping lesion, and previous head injury or neurosurgery, also patients with absolute or relative contraindications for imaging including claustrophobia, metallic implants, pacemaker and prosthetic heart valves for MRI.