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. Author manuscript; available in PMC: 2014 Jan 27.
Published in final edited form as: J Neurosci Methods. 2008 Apr 22;172(1):137–141. doi: 10.1016/j.jneumeth.2008.04.012

Fig. 2.

Fig. 2

Illustration of the improvement of ALFF approach. (a) The time series (without filtering) from a typical voxel in the suprasellar cistern (SC) (−1, −2, −18) and the posterior cingulate cortex (PCC) (−4, −56, 25) of an individual. (b) The power in the SC is higher than that in PCC at almost every frequency. (c) The ratio of the power at each frequency to the integrate power of the entire frequency range indicates that the power in the low-frequency range (0.01–0.08 Hz) is significantly suppressed in the SC.