The meaning of imaging examination report BI-RADS grading Nowadays, many hospitals’ mammograms, ultrasound examinations and MRI reports diagnose how many levels of breast changes BI-RADS, BI-RADS (Breast imaging reporting and data system) that is recommended by the American College of Radiology “Breast imaging reporting and data system”, such a report is more standardized, and the individual meanings are as follows Grade 0: Needs to be recalled and re-evaluated after combining with other examinations. It indicates that the information obtained from the examination may not be complete. Grade I: No abnormality is seen. Grade II: benign changes are considered and regular follow-up is recommended (e.g., once a year). Grade III: Benign disease is possible, but a shorter follow-up period of once every 3 to 6 months is needed, with a malignant percentage of less than 2%. Grade IV: There are abnormalities, and the possibility of malignancy cannot be completely excluded, requiring biopsy for clarification. Grade IVa: low likelihood of malignancy. Grade IVb: moderate likelihood of malignancy. Grade IVc: high probability of malignancy. Grade V: High suspicion of malignant lesion (almost identified as malignant disease), requiring surgical excisional biopsy. Grade VI: Malignant lesion has been confirmed by pathology.