[18F]FLTSUVR Group region mean sd Loud SVZ 0.8935* 0.0461 Noise SGZ 0.7674 0.1444 Control SVZ 1.0081 0.0721   SGZ 0.9237 0.1495

Table 1: SUVR: standard uptake value ratio; *: p<0.05: noise group vs. control group.