We should figure out what this is ... #1
Description
"The SNRs in a single measurement were determined according to the National Electrical Manufacturers Association [38]. Thereby, the SNR was calculated on a voxelwise basis using the ratio of the mean signal intensity of a given voxel over all scan repetitions divided by the standard deviation around that mean."
Clark H. Characterization of special purpose coils for diagnostic magnetic
resonance images. National Electrical Manufacturers Association: NEMA
Standards and Products Guide. 1991;Report nr MS 6-1991 (R1991, R2000).