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. 2014 Nov 28;6(11):855–864. doi: 10.4329/wjr.v6.i11.855

Figure 3.

Figure 3

Sampling and material dependent noise models. Sampling noise model assumes that each tissue type is represented by a single average value and Gaussian-distributed noise is then added. Material dependent noise model assumes that the tissue types are represented by random variables. CSF: Cerebro-spinal fluid; GM: Gray matter; WM: White matter.