Table 1. Technical MRI parameters at sites A and B.
Site A | Site B | ||
---|---|---|---|
Imaging System | Intera | Ingenia | Ingenia |
(Philips Healthcare) | (Philips Healthcare) | (Philips Healthcare) | |
Main magnetic field strength | 1.5 T | 1.5 T | 3.0 T |
Receiver coil | Torso 16-channel | Torso 32-channel | Torso 32-channel |
Image sequence | T1 FFE 3D | T1 FFE 3D | T1 FFE 3D |
Repetition/Echo time (TR/TE; ms) | 3.9/1.84 | 5.2/2.6 | shortest/shortest |
Reconstructed voxel (mm) | 1.0 x 1.0 x 3.0 | 0.69 x 0.69 x 3.0 | 1.04 x 1.04 x 2.5 |
Sense factor (anterior-posterior/feet-head) | 1.8/1.0 | 2.0/1.2 | 2.3/1.3 |
Acquisition time for dynamic phases (s) | 14.6 | 17.0 | 13.0 |
Bolus track | distal thoracic aorta | distal thoracic aorta | distal thoracic aorta |
Delayed arterial phase (s) | 20 | 20 | 20 |
Portal venous phase (s) | 60 | 60 | 60 |
Late venous phase (s) | 180 | 240 | 240 |
Hepatobiliary phase (min)* | 20 | 20 | 20 |
Imaging parameters were consistent in pre-contrast and dynamic image phases after contrast agent administration. T = Tesla; FFE = Fast field echo; * = only applicable after Gd-EOB-DTPA administration.