Amersham Health, Princeton, NJ, provides a comprehensive portfolio of technologically advanced products for virtually every modality: x-ray, magnetic resonance imaging, nuclear imaging, and ultrasound, with products such as Omnipaque? (iohexol), Visipaque? (iodixanol), Omniscan? (gadodiamide), Myoview” (technetium Tc99m Tetrofosmin), and Optison” (Perflutren Protein Type-A Microspheres for Injection, USP). (609) 514-6000; www.amershamhealth.com .