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. 2018 Jun 13;48(3):590–604. doi: 10.1002/jmri.26187

Figure 9.

Figure 9

The SNR is influenced by several factors: The effective temperature factor T or Teff at room temperature which includes the losses of all components; the performance of the preamplifier to amplify the EMF, which is described through the noise figure; the coil quality factor Q, which is the ratio of stored energy to dissipated energy; the filling factor η, which is the ratio of magnetic field energy stored inside the sample volume versus the total magnetic energy stored by the loop; the geometry or g‐factor, which is simply the ratio in noise between accelerated and unaccelerated imaging important in parallel imaging; and the volume of interest and the field strength B0.