Table 3.
Fibroglandular tissue volumes, total breast volumes, fibroglandular tissue percentages, and breast densities (mean ± standard deviation) measured from patients (n = 29, 39 breasts) imaged with tomosynthesis and MRI with different slice thicknesses
| FGT volume (cm3) | Total breast volume (cm3) | Mammographic breast density or FGT-% (%) | |
|---|---|---|---|
| MRI (N = 39) | |||
| 4-mm slice | 86 ± 60 | 756 ± 425 | 13.4 ± 8.4 |
| 2-mm slice | 80 ± 60 | 707 ± 426 | 13.1 ± 8.9 |
| 0.7-mm slice | 94 ± 66 | 740 ± 418 | 14.4 ± 8.6 |
| Tomosynthesis | |||
| MLO (N = 35) | 126 ± 92 | 862 ± 506 | 16.6 ± 8.2 |
| CC (N = 36) | 106 ± 76 | 821 ± 438 | 14.6 ± 7.6 |
| AVG (N = 33) | 119 ± 83 | 862 ± 464 | 15.0 ± 7.4 |
MLO, mediolateral oblique view; CC, craniocaudal view; AVG, averaged measurements; FGT, fibroglandular tissue; FGT-%, fibroglandular tissue percentage