Figure 1.
Overview of reported SNR values in real data (left panel) and simulated data (right panel).[17], [46]–[61].
Figure 2.
Illustration of the notation in the SNR and CNR definitions: is the activation signal,
the noise signal,
defines the amplitude of the activation signal, and
and
indicate the standard deviation of the activation signal and noise signal respectively.
Figure 3.
Percentage of the 119 simulation studies from the literature search that reported a specific SNR/CNR definition.
Table 1.
Reference table for the different SNR/CNR definitions based on a block design.
Table 2.
Reference table for the different SNR/CNR definitions based on an ER design.
Table 3.
Reference table for the different SNR/CNR definitions based on a contrast.
Figure 4.
The relationship between power and the SNR/CNR definitions for 1% signal change.
Figure 5.
tSNR results of the example data, illustrating how the definitions can be applied to real task-based and resting-state fMRI data.
Upper panel: tSNR results for a block design. Lower panel: tSNR results for the resting-state data.