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. Author manuscript; available in PMC: 2018 Jun 14.
Published in final edited form as: J Biomech. 2017 May 17;58:162–173. doi: 10.1016/j.jbiomech.2017.05.004

Figure 4.

Figure 4

De-noising comparison on simulated data. The units of the color bar are in m/s. In this test, the noise standard deviation was set to be σ = 10%|Vmax |. The 4D Flow MRI grid resolution was set to 40 × 80 × 80 voxels. (a) 2-D section location for sampling velocity. (b) Down-sampled ground truth at the 2-D section. (c) Simulated noisy 4D Flow MRI. (d) De-noising using FDM. (e) De-noising using RBF. (f) De-noising using DFM-sm. (g) De-noising using DFM-sms. (h) De-noising using POD. All methods visually appear to more or less preserve details in the velocity profile.