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✓ In a group of 18 patients the cerebral transit time was studied with 99m technetium sulfur colloid and 99m technetium 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.
Crandell et al. (Tue,) studied this question.