RadFollow
Sign in
Guideline Current ACR 2020

O-RADS MRI

Ovarian-Adnexal Reporting and Data System for MRI. Risk categories 0–5 for adnexal lesions incompletely characterized at ultrasound.

Updated Jul 5, 2026
Applies to
  • Indeterminate adnexal lesions on MRI
Classification
  • O-RADS MRI 1
  • O-RADS MRI 2
  • O-RADS MRI 3
  • O-RADS MRI 4
  • O-RADS MRI 5
Exclusions

None listed

Interactive

Decision tree

Enter a finding to compute a recommendation without leaving the page.

Recommendation builder

Select the O-RADS MRI risk category.

Evidence

References

  1. PrimaryThomassin-Naggara I, et al. Ovarian-Adnexal Reporting Data System Magnetic Resonance Imaging (O-RADS MRI) Score for Risk Stratification of Sonographically Indeterminate Adnexal Masses. JAMA Netw Open. 2020;3(1):e1919896.
FAQ

Frequently asked

Does this guideline apply to oncology patients?

No — patients with known malignancy fall outside the scope unless the guideline states otherwise. Follow oncologic surveillance protocols instead.