Table 1.
Sequence Parameters of T2w MR Images Used for Measuring Breast Volume
| Institute 1 | Institute 2 | Institute 3 | Institute 4 | |
|---|---|---|---|---|
| No. scans | 25 | 1 | 1 | 1 |
| Vendor | Philips Ingenia | Siemens Spectra | Philips Achieva | Philips Ingenia |
| Sequence | T2w TSE (VISTA) 3D scanmode | T2w TSE 2D scanmode | T2w TSE 2D scanmode | T2 TSE 2D scanmode |
| Field strength | 1.5 T | 3.0 T | 1.5 T | 1.5 T |
| Coil | 16-channel breast coil | 16-channel breast coil | 7-channel breast coil | 16-channel breast coil |
| Echo time (TE) | 225 ms | 75 ms | 120 ms | 120 ms |
| Repetition time (TR) | 2000 ms | 5000 ms | 5827 ms | 3789 ms |
| Flip angle (FA) | 90 degrees | 80 degrees | 90 degrees | 90 degrees |
| In-plane resolution | 1.0 × 1.0 × 2.00 Mm | 0.75 × 0.75 × 4.0 mm | 0.68 × 0.68 × 3.0 mm | 0.66 × 0.66 × 3.0 mm |
| No. signal acquisitions (NSA) | 1 | 2 | 1.5 | 2 |