Herng-Hua Chang Tung-Ju Hsieh Yun-Ni Ting Woei-Chyn Chu Rician noise removal in MR images using an adaptive trilateral filter. 467-471 2011 BMEI https://doi.org/10.1109/BMEI.2011.6098281 conf/bmei/2011 db/conf/bmei/bmei2011.html#ChangHTC11