Breast imaging-reporting and data system (BI-RADS) > 의학

Breast imaging studies are assigned one of seven assessment categories:

• BI-RADS 0: incomplete

  • need additional imaging evaluation (additional mammographic views or ultrasound) and/or

  • for mammography, obtaining previous images not available at the time of reading

• BI-RADS 1: negative

  • symmetrical and no masses, architectural distortion, or suspicious calcifications

• BI-RADS 2: benign

  • 0% probability of malignancy

• BI-RADS 3: probably benign

  • <2% probability of malignancy

  • short interval follow-up suggested

• BI-RADS 4: suspicious for malignancy

  • 2-95% probability of malignancy

  • for mammography and ultrasound, these can be further divided:

    • BI-RADS 4A: low suspicion for malignancy (2-9%)

    • BI-RADS 4B: moderate suspicion for malignancy (10-49%)

    • BI-RADS 4C: high suspicion for malignancy (50-94%)

  • biopsy should be considered

• BI-RADS 5: highly suggestive of malignancy

  • >95% probability of malignancy

  • appropriate action should be taken

• BI-RADS 6: known biopsy-proven malignancy