Contrast agents in pediatric neuroimaging.

During the last two decades the development of contrast agents for myelography, angiography, computed tomography (CT) and magnetic resonance imaging (MR) has been remarkable. What follows is a review of contrast agents used in neuroradiology-specifically, the ionic and nonionic contrast agents for radiographic/CT procedures, and the paramagnetic contrast agents used in MR studies. Topics covered are the indications for and use of contrast agents, doses and comparisons, complications and cost benefits, and what the future of contrast media might hold.