Variable | Data |
---|---|
Field strength | 1.5T |
Coil | Synergy spine phased array coil |
Pulse sequence | 3D fast-gradient recalled echo, with centric k-space filling |
TR/TE/FA | 6.0 ms/1.7 ms/30° |
Directions | Frequency-encoding CC; phase-encoding AP; sagittal slices |
FOV/RFOV | ≤50 cm CC/40%–70% reduction AP |
Acquisition time | 35-52 seconds per dynamic phase |
Contrast administration | 0.2–0.3 mmol Gd-DTPA/kg body weight, injected at 3 mL/s |
Voxel size | ∼0.8 × 0.8 × 1.2 mm |
Precontrast | Similar acquisition for subtraction |
Dynamic phases | ≥2 |
Scan delay | Scan delay time of acquisition is set to filling of abdominal aorta, determined by MR fluoroscopy with 2-mL test bolus |
Note:—FA indicates flip angle; RFOV, reduced FOV; CC, craniocaudal; AP, anterior-posterior; Gd-DTPA, gadolinium-diethylene-triaminepentaacetic acid.