TY - GEN AU - Muhammad Ali Muhammad Rushdi AU - Abu Bakr Mohamed Yousef , AU - Ahmed Mohamed Badawi , TI - Speckle reduction in medical ultrasound images using weighted diffusion , neural networks and fuzzy logic / PY - 2005/// CY - Cairo : PB - Muhammad Ali Muhammad Rushdi , KW - Fuzzy Logic KW - Neural Networks KW - Speckle Noise KW - Ultrasound Imaging KW - Weighted Nonlinear Diffusion N1 - Thesis (M.Sc.) - Cairo University - Faculty Of Engineering - Department Of Biomedical Engineering; Issued also as CD N2 - Ultrasound imaging of the soft organs in the body is based on receiving the signal reflected from the organ surface as a result for the different mechanical properties of the different body organsHowever , the problem is that the presence of speckle noise and the weakness of the received signal cause a reduction of lesion detectability of approximately a factor of eightSo , it is necessary to reduce this noise before any further study of the received signalIn this thesis , we studied the statistical properties of this noise , reviewed the methods in literature for its reduction and suggested new methods for speckle reduction based on weighted nonlinear diffusion , neural networks and fuzzy logic ER -