[1] [1] Christoph B.Burckhardt.Speckle in ultrasound B-mode scans[J].IEEE Trans on Sonics and Ultrasonics,1978,25(1):1-6

[2] [2] Christos P Loizou,Constantinos S Pattichis,Christodoulos I Christodoulou,et aL Comparative evaluation of despeckle filtering in ultrasound imaging of the carotid artery[J].IEEE Trans on Ultrason.,Ferroelect,Freq.Contr,2005,52(10):1653-1669

[3] [3] Jeun-Shenn Lee.Digital image enhancement and noise filtering by using local statistics[J].IEEE Trans on Pattern Anal.Machine lntell,1980,2(2):165-168

[4] [4] Mustafa Karaman,Alper Kutay M,Gozda Bozdagi.An adaptive speckle suppression filter for medical ultrasonic imaging[J].IEEE Trans on Medical Image,1995,14(2):283-292

[5] [5] Stian Solbo,Torbjorn Eltofl.Homomorphic wavelet hased-statistical despeckling of SAR images[J].IEEE Trans on Geosc.Remote Sensing,2004,42(4):711-721

[6] [6] Nikhil Gupta,Swamy M N S,Eugene Plotkin.Despeckling of medical ultrasound images using data and rate adaptive lossy compression[J].IEEE Trans on Medical Imaging,2005,24(6):743-754

[7] [7] Wee-Soon Yeoh,Cishen Zhang.Constrained least squares filtering algorithm for ultrasound image deconvolution[J].IEEE Trans on Biomedical Engineering,2006,53(10):2001-2007

[8] [8] Tuncer C Aysal,Kenneth E Barner.Rayleigh maximum likelihood filtering for speckle reduction of ultrasound images[J].IEEE Trans on Medical Imaging,2007,26(5):712-727

[9] [9] YU Yong-jian,Scott T Acton.Speckle reducing anisotropic diffusion[J].IEEE Trans on Image Processing,2003,11(11):1260-1270

[10] [10] Thomas R Crimmins.Geometric filter for speckle reduction[J].Applied Optics,1985,24(10):1438-1443

[11] [11] Rafael C Gonzalez,Woods R E.Digital image processing (second edition)[M].Upper Saddle River,NJ:Prentice Hall,2002

[12] [12] CHEN Yan,Shira B Broschat,Patrick J Flynn.Phase insensitive homomorphic image processing for speckle reduction[J].Ultrason.Imag,1996,18(2):122-139

[13] [13] Jorgen A Jensen,Niels B Svendsen.Calculation of pressure fields from arbitrarily shaped,apodized,and excited ultrasound transducers[J].IEEE Trans on Ultrason.,Ferroelect,Freq.Contr,1992,39(2):262-267