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The Quality Standard for Imaging (formerly ISAS)

The Royal College of Radiologists (RCR) and College of Radiographers (CoR) have developed the Quality Standard for Imaging (QSI) to support diagnostic imaging services to make continuous improvements to ensure that patients consistently receive high quality services delivered by competent staff working in safe environments.

Services meet the Standard through accreditation via an independent third party.

The Standard reflects wide consultation with professional colleagues, as well as relevant UK government agencies and regulatory bodies. It has been assessed for use in all four countries of the UK.

QSI 2019

The current Standard was first released in January 2017 and can be found here. A review will be held in 2021.

Support for QSI 2019

The RCR and the CoR acknowledge that many imaging services are operating in an environment where time, money and resources are very limited. 

A staged approach to meeting the QSI Standard has been developed. 

See the video of the QSI launch which explains the staged approach and the support available to imaging services.

A brochure explaining the staged approach can be downloaded here and FAQs about the staged approach can be downloaded here.

Below are a number of resources:

Email to request a visit to introduce the Standard and the support available.


The United Kingdom Accreditation Service (UKAS) delivers accreditation against all elements of QSI, providing formal third-party recognition that a provider has demonstrated their organisational competence to deliver high quality imaging services.

Currently 35 services across the UK have attained accreditation and they are all happy to answer questions you may have about their experiences. You are welcome to visit their sites. Find their details here.

Accreditation to Professional Standards is supported by the Care Quality Commission, NHS England, NHS Northern Ireland, and NHS Wales.

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