Table 2.
MRI Parameters
| Institution 1 | Institution 2 | |||
|---|---|---|---|---|
|
| ||||
| Parameter | Scanner 1 | Scanner 2 | Scanner 1 | |
| Manufacturer | Philips Medical Systems, Best, Netherlands | Siemens Healthcare, Erlangen, Germany | Siemens Healthcare, Erlangen, Germany | |
| Model | 3T Achieva | 3T Skyra | 3T Verio | |
| Coils | ERC | PPAC | PPAC | |
| T2-weighted MR imaging | ||||
| Repetition time/echo time (TR/TE) | 3802-5151/105-115 | 3730/121 | 6400/101 | |
| Acquisition voxel size (mm3) | 0.4 × 0.4 × 3.0 | 0.6 × 0.7 × 3.0 | 0.6 × 0.6 × 3.0 | |
| Reconstruction voxel size (mm3) | 0.3 × 0.3 × 3.0 | 0.5 × 0.5 × 3.0 | 0.6 × 0.6 × 3.0 | |
| Acquisition time (min) | 5.36 | 2.53 | 2.27 | |
| Diffusion-weighted imaging | ||||
| Repetition time/echo time (TR/TE) | 3571-4880/50-74 | 4700/86 | 6400/101 | |
| Acquisition voxel size (mm3) | 1.3 × 1.3 × 3.0 | 1.5 × 1.8 × 3.0 | 2.0 × 2.0 × 3.0 | |
| Reconstruction voxel size (mm3) | 1.4 × 1.4 × 3.0 | 1.6 × 1.6 × 3.0 | 2.0 × 2.0 × 3.0 | |
| b-values (s/mm2) | 0, 500, 1000, 1500, 2000 | 0, 400, 900, 1500† | 0, 100, 200, 350, 500* | |
| Acquisition time (min) | 5.25 | 5.07 | 5.1 | |
†
b-value of 1500 was calculated;
*
1 patient was scanned with b-value up to 800 s/mm2.