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Liver hypodensity on a CT scan is caused by a variety of factors, according to Radiopaedia, such as benign and malignant neoplasms, focal nodular hyperplasia, focal fatty infiltration, benign epithelial cysts, cysts caused by liver disease and infection, pyogenic abscesses, fungal abscesses, amoebic abscesses, vascular infarctions, lacerations, old ...
Infractions generally show up on a CT scan about six to eight hours after the start of stroke symptoms. If a stroke is caused by hemorrhage, or bleeding into the brain, a CT scan can show evidence of this almost immediately after stroke symptoms appear.Hemorrhage is the primary reason for avoiding certain drug treatments for stroke, such as thrombolytic therapy, the only proven acute stroke therapy for ischemic stroke.t will quickly rule out a hemorrhage, and can occasionally show a tumor that might mimic a stroke. A CT scan may even show evidence of early infarction -- an area of tissue that is dead or dying due to a loss of blood supply.