Table I.
Summary of the scanners and calibration scans at the five research sites
| Site | Code | Scan date(s) (m/d/y) | Scanner | Acquisition summary | TE (msec) | TR (msec) | Flip angle | Subjects | |
|---|---|---|---|---|---|---|---|---|---|
| Protocol/orientation/scan time (min) | Voxel dimensions (mm) (slices) | ||||||||
| Utrecht, reference | U0 | 07/10/2001–07/21/2001 | Philips NT 1.5T | 3D‐FFE/coronal/11 | 1×1×1.2 (180) | 4.6 | 30 | 30° | c1–c6 |
| Repeated 1 | U1 | 10/22/2002–01/16/2003 | c1–c5 | ||||||
| Repeated 2 | U2 | 10/29/2002–01/16/2003 | c1–c5 | ||||||
| London | L | 08/16/2001–11/10/2001 | GE Signa 1.5T | 3D‐SPGR/coronal/19 | 0.781×0.781×1.5 (124) | 5 | 35 | 35° | c1–c6 |
| Heidelberg | H | 03/15/2002 | Picker Edge 1.5T | 3D‐FLASH/sagittal/13 | 1×1×1.5 (128) | 3 | 30 | 30° | c1–c6 |
| Jena | J | 03/16/2002 | Philips ACS II 1.5T | 3D‐FFE/sagittal/11 | 1×1×1 (256) | 5 | 13 | 25° | c1–c6 |
| Helsinki | F | 01/18/2003 | Siemens Magnetom Impact 1.0 T | MPRAGE/sagittal/7 | 1×1×1.2 (128) | 4.4 | 11.4 | 12° | c1–c4 |