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. Author manuscript; available in PMC: 2009 Sep 25.
Published in final edited form as: Neuroimage. 2005 Dec 27;30(4):1196–1202. doi: 10.1016/j.neuroimage.2005.10.049

Table 3.

BSI Results for Increasing Levels of Noise

Noise Base - Level 1 Base - Level 2 Base - Level 3 Base - Level 4 Base - Level 5
BSI BSI (abs) BSI BSI (abs) BSI BSI (abs) BSI BSI (abs) BSI BSI (abs)
Mean 0.02 0.07 −0.01 0.24 −0.75 0.75 −4.08 4.08 −8.06 8.06
SD 0.08 0.03 0.36 0.27 0.45 0.45 1.25 1.25 3.37 3.37

The column labeled BSI represents the average percent volume change between the base and second scan with the sign of the change retained. Negative BSI values signify that on average the second scan in the pair was measured as smaller than the base. A positive sign indicates the reverse. The column labeled BSI (abs) indicates the absolute value of the volume change between the base and second scan.