Table 4.
Alterations in individual lesion BI-RADS grading on account of DBT to DM.
| DM | DBT | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| BI-RADS 0 | BI-RADS 1 | BI-RADS 2 | BI-RADS 3 | BI-RADS 4a | BI-RADS 4b | BI-RADS 4c | BI-RADS 5 | Total | |
| Not seen | 10 (5.6) | 2(1.1) | 4 (2.2) | 2 (1.1) | 1(0.6) | 19 (10.6) | |||
| BI-RADS 0 | 6 (3.4) | 2 (1.1) | 8 (4.5) | ||||||
| BI-RADS 1 | 0 | ||||||||
| BI-RADS 2 | 0 | ||||||||
| BI-RADS 3 | 13 (7.3) | 20 (11.2) | 22 (12.3) | 2 (1.1) | 6 (3.4) | 5 (2.8) | 68 (38.2) | ||
| BI-RADS 4a | 18 (10.1) | 11 (6.2) | 9 (5.1) | 6 (3.4) | 22 (12.3) | 66 (37.1) | |||
| BI-RADS 4b | 6 (3.4) | 6 (3.4) | |||||||
| BI-RADS 4c | 9 (5.1) | 2 (1.1) | 11 (6.2) | ||||||
| BI-RADS 5 | 0 | ||||||||
| Total | 13 (7.3) | 48 (27) | 41(23) | 11 (6.2) | 10 (5.6) | 24 (13.5) | 31(17.4) | 178 (100) | |
Information is presented as numbers with percentages indicated in parentheses. The colors indicate whether DBT was upgraded (blue), downgraded (orange), or maintained the same grade (green) as DM. DBT: digital breast tomosynthesis; DM: digital mammography; BI-RADS: Breast Imaging Reporting and Data System.