@article {aja2008noise,
	title = {Noise and signal estimation in magnitude MRI and Rician distributed images: a LMMSE approach},
	journal = {Image Processing, IEEE Transactions on},
	volume = {17},
	number = {8},
	year = {2008},
	pages = {1383{\textendash}1398},
	publisher = {IEEE},
	author = {Santiago Aja-Fern{\'a}ndez and Carlos Alberola-Lopez and Carl-Fredik Westin}
}
