| 词条 | Draft:Acute stroke imaging |
| 释义 |
{{one source|date=December 2018}}{{Advert|date=December 2018}} Acute stroke imaging is neuroimaging, namely tomographic scanning of the brain using X-rays, magnetic resonance, or ultrasound, that occurs within twenty-four hours of a stroke. "Acute" refers not to the nature of a stroke, but to the first twenty-four-hour-period after onset of a stroke.[1] X-ray scan lines or other scan data are complied by a computer to produce a three-dimensional image, or model, of the affected brain area. Like other x-ray techniques involving soft tissue, a CT scan can be enhanced by the injection of iodinated or other contrast material. Every year, about 795,000 people experience a new or a recurrent stroke. Cerebrovascular disease ranks No. 4 among all causes of death and is the leading cause of serious long-term disability in the United States. Hence the need for rapid diagnosis and management is vital.[2] The diagnosis of acute stroke is made on the basis of patient history, clinical examination and neuroimaging. Temporally, stroke is defined as acute (24 hours), sub-acute (1–5 days) and chronic (weeks). The newer category hyper-acute stroke refers to stroke during the first six hours after onset. References1. ^{{Cite web|title=Acute Stroke |publisher=World Health Organization |url=http://archives.who.int/prioritymeds/report/background/stroke.doc }} {{Clear}}Category:Neuroimaging2. ^{{Cite journal|last1=Nentwich |first1=Lauren M. |first2=William |last2=Veloz |year=2012|title=Neuroimaging in Acute Stroke |journal=Emergency Medicine Clinics |volume=30 |issue=3 |pages=659–680 |doi=10.1016/j.emc.2012.06.005 |pmid=22974643 }} |
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