Revision History

In emergency situations, MRI, Nuclear Medicine, PET and Ultrasound facilities may use units and may perform imaging exams that are not accredited in a specific module without jeopardizing their accreditation status.

Timeframe and examination limits for emergency use are provided in the table below. Facilities must notify the ACR and submit testing if the volume of examinations exceeds these limits.


Acceptable Number of ‘Emergency Use’ Examinations/Isotopes

Performed Outside a Unit’s Accreditation Status

MRI exams

Nuclear Medicine/PET/Ultrasound exams

Nuclear Medicine Isotopes (In-111, Ga-67, and TI-201)
30 daysFewer than 10Fewer than 5Fewer than 5
12 monthsFewer than 50Fewer than 25Fewer than 25

Revision History for this Article



Description of Revision(s)



Article created; FAQs incorporated; No criteria changes

Grammatical edit
3-3-2022TableAdded column for Isotopes

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