Table 2.
DM and DBT findings
| Findings | DM (n = 318) | DBT (n = 355) |
|---|---|---|
| Site of lesion | ||
| Right breast | 181 (56.9) | 204 (57.5) |
| Left breast | 122 (38.4) | 136 (38.3) |
| Both breasts | 15 (4.7) | 15 (4.2) |
| Type of lesion | ||
| Mass | 148 (46.5) | 281 (79.2) |
| Asymmetry | 111 (34.9) | |
| Architecture distortion | 26 (8.2) | 15 (4.2) |
| Clusters of micro-calcification with no underlying mass | 18 (5.7) | 7 (2) |
| Dense breast (BIRADS 0) | 15 (4.7) | |
| Dilated ducts | 11 (3.1) | |
| Asymmetrical densities | 15 (4.2) | |
| Overlapped glandular tissue | 21 (6.6) | 26 (7.3) |
| Characters of mass | ||
| Mass margin | ||
| Obscured on mammography and speculated on tomosynthesis | 70 (47.3) | 111 (39.5) |
| Ill-defined | 56 (37.8) | 44 (15.7) |
| Well-defined | 22 (14.9) | 126 (44.8) |
| Mass shape | ||
| Irregular | 67 (45.3) | 130 (46.3) |
| Round | 44 (29.7) | 92 (32.7) |
| Oval | 19 (12.8) | 37 (13.2) |
| Macrolobulated | 18 (12.2) | 22 (7.8) |
| ACR BI-RADS density | ||
| A | 15 (4.7) | 15 (4.2) |
| B | 107 (33.7) | 111 (31.3) |
| C | 170 (53.5) | 189 (53.2) |
| D | 26 (8.1) | 40 (11.3) |
The data are represented as numbers with the corresponding percentages given in parentheses
DBT digital breast tomosynthesis, DM digital mammography, BI-RADS Breast Imaging Reporting and Data System, ACR American college of radiology