Imaging Techniques: Computed Tomography and Magnetic Resonance Imaging in Neuroradiology
The early diagnosis of intracranial tumours in statu nascendi is not yet possible. Since many lesions can attain quite a large size without clinical manifestations, diagnosis cannot be made before initial symptoms have become obvious. Prior to the establishment of computed tomography (CT) in the early 1970s, the diagnosis of a brain tumour could only be accomplished when the lesion was large enough to cause indirect morphological signs such as a significant shift of midline structures or displacement of normal vessels, or when pathological vasculature could be demonstrated. CT initiated a diagnostic revolution as brain tissue could, for the first time, be visualised directly. Magnetic resonance imaging (MRI) has further improved the possibility of direct diagnosis.
KeywordsMagnetic Resonance Imaging Pilocytic Astrocytoma Central Nervous System Disease Midline Structure Benign Meningioma
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