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British Journal of Radiology (1976) 49, 330-334
© 1976 British Institute of Radiology
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The British Journal of Radiology, Vol 49, Issue 580 330-334, Copyright © 1976 by British Institute of Radiology

ARTICLES

Computer subtraction in regional cerebral blood-volume measurements using the EMI-Scanner

E Zilkha, G Ladurner, LD Iliff, GH Du Boulay and J Marshall

A computerized subtraction technique has been described to measure regional cerebral blood volume (rCBV) using the EMI-Scanner in a group of 13 patients. Sodium iothalamte was injected intravenously (1-75 ml./kg) to increase the absorption of X rays in the cerebral circulation. Significant regional differences in CBV were shown, values in the frontal and temporal regions being lower than the mean hemisphere value (4-9 +/- 0-7) and higher in the occipital region. The left hemisphere showed a significantly higher CBV when compared with the right. Measurements of CBV in the cortex showed no regional variation, but the mean cortical value of 6-0 +/- 1-8 was significantly higher than the hemisphere mean.


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