Table 1 Cardiovascular magnetic resonance protocol for UK Biobank
From: UK Biobank’s cardiovascular magnetic resonance protocol
Description | Sagittal anatomy | Coronal and Transverse anatomy” | Long axis cines | Short axis cines | Aortic distensibility cine | Tagging | Coronal LVOT cine | Aortic valve flow | Native T1 map |
|---|---|---|---|---|---|---|---|---|---|
Pulse sequence: Simplified terminology (scientific terminology) | White blood CMR (bSSFP) | White blood CMR (bSSFP) | Cine CMR (bSSFP) | Cine CMR (bSSFP) | Cine CMR (bSSFP) | Strain CMR (GRE) | Cine CMR (bSSFP) | Flow CMR (GRE) | Parametric CMR (ShMOLLI WIP780B) |
Flip angle (°) | 80 | 80 | 80 | 80 | 80 | 12 | 80 | 20 | 35 |
TR (ms) | 2.6 | 2.6 | 2.7 | 2.6 | 2.8 | 8.2 | 2.7 | 4.6 | 2.6 |
TE (ms) | 1.12 | 1.12 | 1.16 | 1.10 | 1.17 | 3.90 | 1.16 | 2.47 | 1.07 |
GRAPPA factor | 2 | 2 | 2 | 2 | 2 | 0 | 2 | 2 | 2 |
Slice thickness (mm) | 8.0 | 8.0 | 6.0 | 8.0 | 6.0 | 8.0 | 6.0 | 6.0 | 8.0 |
Slice gap (mm) | 2.64 | 4 | n.a. | 2 | n.a. | n.a. | n.a. | n.a. | n.a. |
Typical Field of View (mm) | 400 x400 | 400 x 400 | 380 x 274 | 380 x 252 | 380 x 294 | 350 x 241 | 380 x 384 | 340 x 340 | 360 x 236 |
Matrix | 240 x 158 | 240 x 158 | 208 x 187 | 208 x 187 | 240 x 216 | 256 x 174 | 208 x 187 | 192 x 173 | 192 x 192 |
Voxel size | 1.7 x 1.7 x 8.0 | 1.7 x 1.7 x 8.0 | 1.8 x 1.8 x 6.0 | 1.8 x 1.8 x 8.0 | 1.6 x 1.6 x 6.0 | 1.4 x 1.4 x 8.0 | 1.8 x 1.8 x 6.0 | 1.8 x 1.8 x 6.0 | 0.9 x 0.9 x 8.0 (Interpolation = On, factor 2) |
Acquired temporal resolution (ms) | n.a. | n.a. | 32.64 | 31.56 | 28.00 | 41.05 | 32.64 | 37.12 | 368.28 |
Calculated cardiac phases | 1 | 1 | 50 | 50 | 50 | 1 | 50 | 30 | 1 |
ECG triggering/gating | PT | n.a. | RG | RG | RG | PT | RG | RG | PT |
Other parameters | Inline Evaluation Ventricular Function | Inline Evaluation Ventricular Function | Grid spacing 6 mm, shared phases | T1 map determined on-line. | |||||
Image Filter | Off | Off | Off | Off | Off | Off | Off | Off | Off |
Distortion Corr | On (2D) | On (2D) | On (2D) | On (2D) | On (2D) | On (2D) | On (2D) | On (2D) | Off |
Raw Filter | Off | Off | Off | Off | Off | Off | Off | Off | On: Weak, slope 25 |
Elliptical filter | Off | Off | Off | Off | Off | Off | Off | Off | Off |
No of breath-holds (expiration) | 1 | 1 | 1 slice per breath-hold | 1 slice per breath-hold | 1 | 1 slice per breath-hold | 1 | 1 | 1 |
Orientation | Sagittal (x11) PE direction = AP | Coronal (x10), Transverse (x10) PE direction = RL & AP | HLA, VLA, LVOT (sagittal) views PE direction = varies | Coverage based to apex in SA views (approximately x10) PE direction = AP | Transverse at level of pulmonary trunk/right pulmonary artery PE direction = AP | SA views (b, m, a) PE direction = AP | LVOT (coronal) view PE direction = RL | Aortic valve plane planned on both LVOT cines PE direction = AP | SA (m) PE direction = AP |
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