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. Author manuscript; available in PMC: 2009 Oct 5.
Published in final edited form as: IEEE Trans Med Imaging. 2008 Oct;27(10):1389–1403. doi: 10.1109/TMI.2008.920609

Fig. 3.

Fig. 3

Coronal slice from a 3-D acquisition. (a) Original image. (b) Conventional approach. (c) EM method. (d) Koay’s method. (e) LMMSE estimator, adaptive noise estimation using the local mean and a 5×5 window. (f) RLMMSE estimator, adaptive noise estimation using the local mean and a 5×5 window (eight iterations).