PRINCETON, N.J.--(BUSINESS WIRE)--Bracco Diagnostics Inc., the US-based subsidiary of Bracco Imaging SpA which is part of Bracco Group and is one of the world leading companies in the imaging agent business, and HealthTrust Purchasing Group (HealthTrust), one of the leading healthcare group purchasing organizations in the United States, announced today a three year agreement, to make Bracco Imaging SpA’s Magnetic Resonance Imaging (MRI) contrast media products available to HealthTrust members through 2010.