CT brain scan showing stroke (or CVA)

CT brain scan showing stroke (or CVA)

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Credit: SIMON FRASER/RVI, NEWCASTLE/SCIENCE PHOTO LIBRARY

Caption: Stroke: computed X-ray tomography (CT) scan of the brain of woman aged 48 years, revealing an area of cerebral infarction - the result of a stroke. The infarct - brain tissue starved of blood - appears as the dark rectangular area in centre. In CT, a narrow X-ray beam is directed through the subject towards a diametrically-opposed detector. A series of "slices" is made, with source & detector moving synchronously around the subject. Measurements of transmitted X-rays are processed by computer to reveal how elements of tissue in each "slice" affect the passage of X-rays & so construct an image of the section.

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Keywords: blood vessel, cerebral infarction, cerebrovascular accident, cerebrovascular disease, condition, ct scan, cva, disease, disorder, healthcare, medical, medicine, neuroimaging, stroke, vascular

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