Fig. 2
From: Birdcage volume coils and magnetic resonance imaging: a simple experiment for students

SNR vs inverse birdcage volume RF coil diameter for the CuSO4 solution (a), the carrot (b) and the mouse brain (c). Data from Table 2 are plotted and fitted using a linear least squares fit. The linear relationship between SNR and the inverse birdcage volume RF coil diameter (1/d) is shown on each of the graphs along with the correlation coefficient R 2. The linear fits to the data all produced correlation coefficients close to 1, ranging from 0.9965 to 0.9999 indicating strong linear relationships