What this calculator does
Organizes ovarian and adnexal lesion descriptors into the applicable O-RADS assessment pathway.
Choose the imaging pathway and enter the visible lesion descriptors. The tool applies the matching US or MRI decision logic.
Clinical scope
Use O-RADS to describe and risk-stratify ovarian or other adnexal lesions on ultrasound or MRI. Ultrasound is the primary pathway; MRI is a complementary problem-solving pathway with separate descriptors and logic.
Applicability and exclusions
- Do not apply an ultrasound category from MRI findings, or an MRI category from ultrasound findings.
- Pregnancy, acute symptoms, known malignancy, and lesions clearly arising outside the ovary/adnexa require clinical context beyond the score.
Method and calculation logic
Select the imaging pathway first. The calculator then combines pathway-specific morphology, solid tissue, vascularity or enhancement, and other descriptors into an O-RADS assessment category.
Interpretation table
| Category | General interpretation |
|---|---|
| O-RADS 0 | Incomplete evaluation |
| O-RADS 1 | Normal ovary |
| O-RADS 2 | Almost certainly benign |
| O-RADS 3 | Low risk |
| O-RADS 4 | Intermediate risk |
| O-RADS 5 | High risk |
Worked example
Case: Fictional example: a unilocular smooth cystic adnexal lesion is assessed on ultrasound without a solid component.
Calculation: Choose the US pathway and enter the lesion morphology, size, wall features, and Doppler information shown on the examination.
Interpretation: The generated category must be checked against the complete O-RADS US table, menopausal status, symptoms, and local management policy.
How to use this calculator
- Complete the visible imaging and measurement fields. Required inputs are marked in the workbench.
- Review the calculated category, score, measurements, and any recommendation or warning.
- Copy the report-ready text only after checking the result against the complete examination and source guideline.
Calculator-specific questions
Are the US and MRI categories interchangeable?
No. They are complementary systems with different descriptors and decision pathways.
Does an O-RADS category determine treatment by itself?
No. Management also depends on symptoms, menopausal status, risk factors, prior imaging, and local practice.
Are patient measurements sent to RadPhrases?
No. Calculator inputs and results are processed in the browser and are not submitted by this page.