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The BI-RADS (Breast Imaging- Reporting and Data System ) atlas is a comprehensive guide that standardizes the language, report format, assessment structure, and classification system used in breast imaging, including mammography, ultrasound, and MRI. This standardized reporting system allows radiologists to convey their findings and recommendations to the referring physician in a clear, consistent, and organized manner. This ensures that there is a common understanding of the results and next steps for patient management, minimizing any potential miscommunication or misunderstanding.
| BI-RADS Classification | Description |
|---|---|
| BI-RADS 0: Incomplete | Need additional imaging evaluation (additional mammographic views or ultrasound) and/or 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 | 2-94% 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... |
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