الفهرس 
Anatomy of the brainOnly 14 pages are availabe for public view
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Abstract
Cerebrovascular diseases are considered a very hard burden as they may lead to poor outcome and they are very common to a degree that considered the second most common cause of morbidity and mortality after coronary artery disease. They include wide variety of diseases that affect vascularity of brain tissue with the most common one is stroke either ischemic or hemorrhagic.They are presented with wide variety of symptoms and signs but the diagnosis is established clinically and confirmed by different imaging modalities with CT and MRI are the gold standard ones. CT is the first imaging modality in trauma patients and MRI in patients with symptoms suspected stroke. Advances in new MRI sequences are in progress for further assessment and understanding the pathophysiology of different cerebrovascular diseases and subsequently improving the methods of management with better outcome. One of these new MRI sequence is susceptibility weighted imaging (SWI) that recently show significant help in diagnosis of different cerebrovascular diseases and has wide variety of clinical applications.SWI is different from other routine MRI sequences as it is a fully velocity compensated high-resolution 3D gradient-echo sequence that uses magnitude and filtered-phase information to create a different form of contrast especially to substances with different susceptibilities than their neighboring tissues, This special data acquisition is exquisitely sensitive to venous blood, hemorrhage iron storage and calcification. These properties make SWI very sensitive in detection of microbleed and hemorrhage in any pathological condition like infarction, diffuse axonal injury, and vascular malformation like cavernoma, and arteriovenous malformation, also calcium with it’s different compounds are very susceptible substances that make SWI also very sensitive in diagnosis of calcification in various pathological lesions that were difficult to be diagnosed with conventional MRI sequences. So the aim of this study is to evaluate the role of SWI in better detection and assessment of different cerebrovascular diseases.