Table 2.
FA and mean ADC from DTI acquired from normal subjects using 32, 15, and 6 gradient directions
| 32 directions (n=22)
|
15 directions (n=20)
|
6 directions (n=8)
|
||||
|---|---|---|---|---|---|---|
| FA | ADC | FA | ADC | FA | ADC | |
| Mean | 0.559 | 0.638 | 0.590 | 0.698 | 0.659 | 0.867 |
| Standard deviation | 0.071 | 0.206 | 0.080 | 0.223 | 0.109 | 0.325 |
| Range | 0.436–0.645 | 0.455–0.781 | 0.450–0.748 | 0.425–0.802 | 0.509–0.784 | 0.465–0.919 |
ADC (10−3 mm2/s).