Table 2:

Scanning parameters of ASL-MRA and CE-MRA

ParameterASL-MRACE-MRA
MRA typeDynamic (4D)Dynamic (4D)
Scan duration (min:sec)5:583:19
Contrast
 AcquisitionT1-TFEPIT1-FFE
 TR (ms)123
 TE (ms)51
 Flip angle10°25°
Resolution
 FOV (RL × AP × CC mm)210 × 210 × 90150 × 210 × 210
AcquisitionTransversalSagittal
Slabs11
Acquisition matrix172 × 172 × 7050 × 248 × 248
Acquired voxel size (mm)1.22 × 1.26 × 1.33 × 0.85 × 0.85
Reconstruction matrix256 × 256288 × 288
reconstructed voxel size (mm)0.82 × 0.82 × 0.651.5 × 0.73 × 0.73
No. of slices140100
SENSE factor2.5/14/2
Dynamic acquisition
 Dynamic imaging modeTFEPICENTRA keyhole
 No. of dynamic phases824
 Phase interval (temporal resolution) (ms)200 608 
 Label delay (ms)200 
 ContrastGadovist 0.1 mL/Kg; IV pump injection: 3.5 mL/s
  • Note:—indicates non-applicable; TFEPI, Turbo-field echo-planar imaging; FFE, fast-field echo; CENTRA, enhanced robust-timing angiography; RL, right-left; AP, anterior-posterior; CC, caudo-cranial; SENSE, sensitivity encoding.