Table 2. Mean (± standard deviation) of the in vivo NAA/Cr ratios across all the volunteers for CSI and RAPID-SI (R = 8) inside the ROI.

NAA/Cr	Subject 1	Subject 2	Subject 3	Subject 4	Subject 5	Subject 6	Subject 7	Subject 8
CSI	2.15 ± .08	1.90 ± .08	1.92 ± .15	2.03 ± .11	2.17 ± .11	2.03 ± .14	2.00 ± .15	1.91 ± .22
RAPID-SI (R = 8)	2.13 ± .06	1.92 ± .07	1.92 ± .17	2.00 ± .14	2.15 ± .13	2.05 ± .13	1.98 ± .14	1.93 ± .20