sodium-pertechnetate-tc-99m and Seizures

False positive dynamic imaging of the cerebral circulation simulating vascular occlusive disease resulted from a clinically insignificant congenital variation in several patients at our institutions. The anomaly consisted of the asymmetrical caliber of the internal carotid and proximal anterior cerebral arteries. The 1 mm difference in the diameter of the internal carotid arteries was sufficient to be appreciated on dynamic imaging. The frequency of this anomaly was found to be 5% in a series of 200 bilateral carotid angiograms.

Topics: Adult; Arterial Occlusive Diseases; Brain; Carotid Artery, Internal; Cerebral Angiography; Cerebral Arteries; Cerebrovascular Circulation; False Positive Reactions; Humans; Male; Radionuclide Imaging; Regional Blood Flow; Seizures; Sodium Pertechnetate Tc 99m; Technetium