Fig. 2

Sites of chosen gray matter and white matter ROIs for calculation of SNR and CNR. a Sites of gray matter ROIs (4–6, 10–12)and white matter ROIs (1–3, 7–9) at the level of centrum semiovale. b Sites of gray matter ROIs (1–6) and white matter ROIs (7–12) at level of corona radiata. c Sites of gray matter ROIs (1–6) and white matter ROIs (7–10) at level of thalamus