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. Author manuscript; available in PMC: 2016 Nov 15.
Published in final edited form as: Neuroimage. 2015 Aug 1;122:373–384. doi: 10.1016/j.neuroimage.2015.07.074

Figure 3.

Figure 3

A Single repletion of dMRI data with low SNR for magnitude (top) and phase corrected real-valued data (bottom). B Results of signal averaging for both data types. After six averages, the magnitude data show accumulated noise - visible as a “mist” overlaying the image. The phase corrected real-valued dMRI data are not affected by noise bias. Therefore, averaging visibly increases SNR for real diffusion data. The bottom graph of Figure B shows the signal course of real and magnitude data alongside the lines in the averaged data. The dashed line marks a signal intensity of zero. The diminished noise floor of real-valued data allows identifying smaller intensity differences. All images in this figure are displayed on the same scale.