Table 2 Pulmonary MR angiography protocol used at our institution on a 1.5-T magnet
From: Looking beyond the thrombus: essentials of pulmonary artery imaging on CT
| Â | Sequence type | Orientation | Slice thickness/gap (mm) | TE/TR (msec) | Flip angle (degrees) | Matrix | Field of view (mm) | Bandwidth (Khz) | NEX | Information acquired |
|---|---|---|---|---|---|---|---|---|---|---|
Non-contrast | SSFP | Axial, coronal, ventricle short axis | 4/0 | 1.4/3.4 | 45 | 200 × 160 | 350–420 | 125 | 0.75 | Morphology, ventricle function |
T1 | Axial, short axis | 6/0 | 42 | 90 | 256 | 38 | 62.5 | 1 | Morphology, characterise mass lesions, oedema | |
T2 | Axial, short axis | 6/0 | 41/1,791 | 90 | 256 × 256 | 350 | 62.5 | 1 |  | |
Phase Contrast | Perpendicular to pulmonary flow | 8 | 2.7/5.6 | 25 | 192 × 128 | 350 | 31.25 | 1 | Quantify pulmonary flow volume, peak-mean velocity, regurgitation | |
Contrast-enhanced MR angiography | MR angiography | Coronal | 2.0 | 1.4/3.9 | 30 | 224 × 224 | 320–420 | 62.5 | .5 | Luminal assessment |
Time resolved | Coronal | 2.6 | 1.2/3.2 | 38 | 256 × 192 | 40 | 62.5 | 0.5–0.75 |  | |
3D GRE | Axial | 4/–2 | 1.9/3.9 | 12 | 320 × 160 | 320–420 | 83.3 | 0.75 |  | |
Delayed enhanced | Axial, short axis | 8/0 | 1.3/5.3 | 20 | 224 × 192 | 35 | 22.7 | 1 | Thrombus, vessel wall, inflammation/scar |