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. Author manuscript; available in PMC: 2011 Feb 1.
Published in final edited form as: Neuroimage. 2009 Nov 12;49(3):2123–2133. doi: 10.1016/j.neuroimage.2009.11.006

Table 4.

Retest examinations on the same scanner (columns 2–8) and on different scanners (columns 9–15), detailed per scanner type by number of sites (columns 2, 9), number of examinations (columns 3–5, 10–12), and clinical status (columns 6–8, 13–15).

Scanner hardware Retest same scanner
 Retest different scanner
Sites Σ ♀ ♂ Normal MCI AD Sites Σ ♀ ♂ Normal MCI AD
Excite HD 1.5T 2 6 0 6 2 0 4 1 2 0 2 0 1 1
Excite PA 1.5T 5 20 4 16 6 8 6 10 82 42 40 27 36 19
Excite PA 3.0T 0 0 0 0 0 0 0 4 17 10 7 8 6 3
Genesis HD 1.5T 1 4 0 4 0 4 0 3 14 7 7 3 7 4
Genesis HD 3.0T 0 0 0 0 0 0 0 1 6 3 3 2 2 2
HDx PA 1.5T 0 0 0 0 0 0 0 1 3 2 1 2 0 1
HDx PA 3.0T 0 0 0 0 0 0 0 1 3 0 3 2 1 0
Achieva HD 1.5T 0 2 0 2 0 3 0 1 5 3 2 3 1 1
Achieva PA 1.5T 4 10 6 4 4 6 0 4 18 4 14 6 9 3
Achieva PA 3.0T 0 0 0 0 0 0 0 8 44 19 25 15 19 10
Allegra HD 3.0T 0 0 0 0 0 0 0 3 29 16 13 10 14 5
Avanto PA 1.5T 1 4 0 4 2 2 0 2 3 1 2 2 1 0
Sonata HD 1.5T 0 0 0 0 0 0 0 2 8 6 2 2 1 5
Sonata PA 1.5T 1 2 2 0 0 2 0 1 5 3 2 1 4 0
Symphony HD 1.5T 0 0 0 0 0 0 0 2 25 14 11 6 15 4
Symphony PA 1.5T 2 4 4 0 0 2 2 2 7 4 3 2 5 0
Trio PA 3.0T 1 30 16 14 6 18 6 13 73 38 35 17 38 18
Totals 17 82 32 50 18 46 18 59 344 172 172 108 160 76

Note that each subject was scanned twice, i.e., each subject is counted twice in this table. Some subjects took part in both retests, so some of the examinations are counted twice.