Imaging Middleware is a set of tools, libraries, and applications designed to support multiple operations including DICOM compliant picture archiving and communication systems (PACS) interoperability with the caGrid, remote client operations on a PACS server, and secure bulk data transfer of DICOM objects in a grid based environment.
Imaging Core Middleware/Virtual PACS. Radiological Society of North America 2009 Scientific Assembly and Annual Meeting, November 29 - December 4, 2009 ,Chicago IL.
http://archive.rsna.org/2009/8503045.html