Table 2.
Postmortem MR parameters for axial T2-weighted acquisition of the foetal head
| Site 1 1.5T Siemens Symphony (N = 8) |
Site 1 3T Philips Ingenia (N = 1) |
Site 2 3T GE Excite (N = 2) |
Site 3 3T Siemens Magnetom Verio (N = 2) |
|
|---|---|---|---|---|
| Coil | 16-channel head | 8-channel paediatric head | 12-channel knee or 16-channel head | 12-channel head with 4-channel neck |
| T2 W seq (ax/cor/sag) | SPACE | TSE–ETL 30 | FSE (ax/cor/sag) | TSE |
| TR/TE |
3200/388 TI 1100 |
3500/160 | 3320/110 | 2500 / 73 |
| FOV | 250 | 100 |
160 (ax) 140 (sag/cor) |
150 |
| Slice (mm) | 1 | 3 no skip | 3/skip 0.3 | 3 |
| Matrix | 512 × 516 | 168 × 168 |
192 × 320 (ax) 192 × 352 (cor/sag) |
163 × 256 |
| Voxel (mm) | 0.5 × 0.5 × 1.0 | 0.6 × 0.6 × 3 | 0.7 × 0.4 × 3.3 | 0.7 × 0.6 × 3 |
| Excitations | 1 | 1 | 2 | 1 |
| Bandwidth (Hz/pixel) | 435 | 31.25 | 222 |
seq sequence, TR repetition time, TE echo time, TI inversion time, ax axial, cor coronal, sag sagittal, FOV field of view, Hz Hertz, TSE turbo spin echo, ETL echo train length, FSE fast spin echo, SPACE sampling perfection with application optimised contrasts using different flip angle evolution