The Breast Imaging Reporting and Data System (BI-RADS) is a standardized system to describe mammogram findings and results. Developed by the American College of Radiology (ACR), results of mammograms are sorted into categories numbered 0 through 6 with interpretation as follows:
Category 0: Additional imaging evaluation and/or comparison to prior mammograms is needed.
Category 1: Negative.
Category 2: Benign (noncancerous) finding.
Category 3: Probably benign finding—Follow-up in a short time frame is suggested.
Category 4: Suspicious abnormality—Biopsy should be considered.
Category 5: Highly suggestive of malignancy—Appropriate action should be taken.
Category 6: Known biopsy-proven malignancy—Appropriate action should be taken. ■
The quality of mammography images has markedly improved over the past few decades. However, the quality of the interpretation of mammograms remains variable. That said, more than 38 million mammograms are performed annually in the United States.
So said Diana Buist, PhD, Senior Scientific...