Overview
iHistory^® is our end-to-end technology platform for the construction and management of health information exchanges (HIEs). Based on the same interoperability standards being mandated by governments around the world, iHistory provides healthcare IT vendors, system integrators, and regional and national intiatives with the components required to link disparate healthcare organization to securely exchange clinical data on the patients that they share. Further, iHistory provides unparalleled features to support the cross-enterprise sharing of medical imaging results.

Architectural components
iHistory enables the construction of federated, centralized or hybrid models of health information exchange, providing interoperable, plug-and-play components including:

Privacy/security features
iHistory is designed to simultaneously enforce multiple privacy policies that can vary among different medical institutions. This flexibility enables each exchange participant to implement the very same policies already in use for disclosing protected health information (PHI) on paper or film without requiring consensus among all participants on a common set of data sharing policies. iHistory can simultaneously support patient opt-in and opt-out models, while restricting access to PHI on the basis of site-defined role-based access controls.

Technical implementation
To ensure the highest standards of reliability, availability and scalability, iHistory components are built in Java and conform to a service oriented architecture (SOA) that streamlines integration with third party applications and systems through web services.

Standards and interoperability
HxTI is a dedicated sponsor and active participant in the Integrating the global Integrating the Healthcare Enterprise (IHE) initiative, the global effort to establish “plug-and-play” interoperability between clinical IT systems.

iHistory is perhaps unique in having proven compliance with every IHE "integration profile" introduced to date for the cross-enterprise exchange of health information. These include:

• XDS
  cross-enterprise document sharing
• PIX
  patient identity cross-referencing
• PDQ
  patient demographics query
• XCA
  cross community access
• XUA
  cross-enterprise user assertion
• ATNA
  audit trail and node authentication
• NAV
  notification of availability
• BPPC
  basic privacy and patient consent
• CT
  consistent time