COMPARISON OF XE-CT CBF AND QUANTITATIVE ECD-SPECT/

We compared stable xenon enhanced X-ray computed tomography (Xe-CT) wi th Technetium-99m ethylsteinate dimer single-photon emission computed tomography (ECD-SPECT) in 12 patients. We evaluated the cerebral blood flow (CBF) values in the territory of the anterior, middle and poster ior cerebral artery, and in the thalamus. The CBF values were higher i s ECD-SPECT than in Xe-CT except for the values of the thalamus. The p osterior cerebral artery territory showed a lower correlation and the thalamus had no correlation between two methods. We discussed causes o f these differences.