Diagnostic Imaging Common Service Standard (DI CS)

This initiative will enhance the delivery of patient care in Ontario by building on the success of regional diagnostic imaging repositories. It will provide comprehensive secure access to a patient’s provincial longitudinal DI record from anywhere and at any time, as well as consistent displays of information to clinicians at point-of-service. The DI common service standard will be used by system implementers to support the sharing of DI reports and images.

Key benefits include: consistent data exchange format across the regional diagnostic imaging repositories, easier access for retrieval of reports and images for viewing, and standardized naming of diagnostic imaging procedures for consistent naming of DI procedures provincially.


The diagnostic imaging initiative will enable and support sharing and viewing of diagnostic imaging results across Ontario to all hospital and community-based health care providers anytime, anywhere, using the tools best suited to their work practices. Currently it offers clinicians the ability to view reports through eHealth Ontario’s ONE® Portal. This will be followed by the provincial DI viewer, the three regional integration portals, electronic medical record devices and individual organizations’ picture archiving and communications systems.

The diagnostic imaging common service standard includes the following;

  • diagnostic imaging implementation guide
  • local to provincial mapping guidelines
  • sample terminology map
  • vocabulary worksheet 
  • terminology set and guidelines


The standard was validated by numerous stakeholder groups including the Ministry of Health and Long-Term Care, Canada Health Infoway, OntarioMD, Cancer Care Ontario and Ontario Telemedicine Network.

Stakeholder reviews generated more than 133 comments and recommendations; more than 57 per cent of the recommendations resulted in changes to the final version. The standard was approved by the EHR Architecture and Standards Strategic Committee on July 16, 2015.

April 30th, 2015 - May 22nd, 2015

Open Review

May 6th, 2015 - May 7th, 2015

One-hour webinar

July 16th, 2015 -

EHR Architecture and Standards Strategic Committee approved the standard



This standard is available to download.