Table 1.

Average and standard deviation of whole brain OEF.

	PET			QQ
Subject	Scan 1	Scan 2	average	Scan 1	Scan 2	Average
1	46.9 ± 5.4	39.9 ± 5.0	43.4 ± 4.9	38.5 ± 5.3	36.3 ± 5.2	37.4 ± 5.1
2	35.6 ± 5.9	32.3 ± 4.4	34.0 ± 4.8	33.3 ± 3.5	31.1 ± 3.3	32.2 ± 3.1
3	25.6 ± 3.8	21.9 ± 3.2	23.7 ± 3.3	35.1 ± 5.6	32.4 ± 4.8	33.8 ± 5.0
4	26.1 ± 3.6	27.4 ± 3.2	26.8 ± 3.2	29.6 ± 3.1	31.7 ± 3.9	30.7 ± 3.4
5	27.8 ± 3.2	23.7 ± 3.3	25.8 ± 3.1	35.9 ± 4.1	34.9 ± 4.5	35.4 ± 4.2
6	34.1 ± 4.1	28.5 ± 4.4	31.3 ± 3.7	31.3 ± 4.0	34.4 ± 1.1	32.8 ± 2.4
7	30.4 ± 4.3	31.2 ± 3.9	30.8 ± 4.0	33.4 ± 4.5	32.4 ± 5.0	32.9 ± 4.4
8	34.3 ± 3.8	34.3 ± 4.1	34.3 ± 3.8	32.6 ± 4.1	37.8 ± 5.9	35.2 ± 4.6
9	38.5 ± 4.5	30.2 ± 3.5	34.4 ± 3.6	39.2 ± 5.4	N.A.	39.2 ± 5.4
10	48.1 ± 4.8	39.0 ± 4.0	43.6 ± 4.0	34.8 ± 3.8	30.1 ± 5.4	32.5 ± 4.0
avg ± std	34.3 ± 8.3	30.9 ± 6.2	32.8 ± 6.7	33.8 ± 2.6	33.4 ± 2.5	34.2 ± 2.6

Note: The unit of OEF is percent. No significant difference was found between PET and QQ average (p = 0.5). PET and QQ show small scan to rescan variations (p < 0.009 for PET and p = 0.7 for QQ). N.A. indicates that the data is not available.