Cerebral transit time of 99m technetium sodium pertechnetate before and after cerebral arteriography.

✓ In a group of 18 patients the cerebral transit time was studied with 99mtechnetium sulfur colloid and 99mtechnetium sodium pertechnetate before and after cerebral arteriography. The results were compared with a similar study in a group of 21 control patients, and no statistical difference was noted. Cerebral arteriography, when performed without complications, does not alter the cerebral transit time.