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Dynamic CT brain scanning in the haemodynamic evaluation of cerebral arterial occlusive disease

✍ Scribed by S. M. Davis; B. M. Tress; J. L. Hopper; A. H. Kaye; S. C. Rossiter

Publisher: Springer
Year: 1987
Tongue: English
Weight: 672 KB
Volume: 29
Category: Article
ISSN: 0028-3940
DOI: 10.1007/bf00451764

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✦ Synopsis

Dynamic cerebral CT scanning (DCT) was used to quantitatively analyse the haemodynamic effects of extracranial and intracranial arterial occlusive lesions in 17 patients with TIA's or minor cerebral infarcts. Using DCT and gamma variate curve fitting, mean transit times were determined for the terminal internal carotid arteries, middle cerebral arteries and middle cerebral-supplied Sylvian cortex at the level of the Circle of Willis. Six patients were studied sequentially, four before and after transcranial bypass surgery. No arterial or tissue delays were found in patients without haemodynamic arterial lesions or cortical infarcts. Seven of nine patients with haemodynamic, extracranial carotid lesions showed ipsilateral delays in arterial or tissue transit times. Tissue delays usually correlated with CT or clinical evidence of infarction. Improved haemodynamics in patients re-studied correlated with the effects of surgery or clinical recovery. DCT has several important limitations but has the potential to provide additional haemodynamic information about the cerebral circulation in selected patients with cerebral arterial occlusive disease.

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