Baid (NIH, Bethesda, MD), one of the researchers. Reports of hypertensive crisis after contrast-enhanced CT scan in patients with pheochromocytoma had led clinicians to question the safety of this ...

[2] Noncontrast CT in the emergency diagnosis of appendicitis is attractive for several reasons. Administration of oral contrast consumes valuable time in today's fast-paced and overcrowded ED.

to do an immediate delayed phase CT scan to get a better image if a suspected clot or slow flow is seen in the single phase. “The delayed phase scan gives time for the IV contrast to get to left ...