Signal intensity of ROIs in sodium images

Untreated48 Hours1 Week1 Month
Tumor (mean)22.85 (SD, 2.61)24.19 (SD, 2.45)22.28 (SD, 0.27)36.08 (SD, 0.12)
CSF (mean)23.23 (SD, 7.56)24.43 (SD, 2.66)27.53 (SD, 0.33)25.92 (SD, 0.26)
Ratio0.980.990.801.39