[A medical ultrasonic image filtering method based on anisotropic diffusion].
OBJECTIVE
To remove the speckle noise in ultrasonic images by using anisotropic diffusion method.


METHODS
Based on anisotropic diffusion, a partial differential equation, of which the initial data was the input images, was transformed into differential forms and solved with iterations. The speckle scale function of the equation was modified to make better use in filtering medical ultrasonic images.


RESULTS
By comparing the results with other three filters, the anisotropic diffusion method could smooth the speckles very well and the edge of the image was also clear.


CONCLUSIONS
Anisotropic diffusion can remove the speckle noise effectively and has great potential in filtering medical ultrasonic images.
Yun
Y
Peng
De-yu
DY
Li
Jiang-li
JL
Lin
Tian-fu
TF
Wang
Chang-qiong
CQ
Zheng
Hong
H
Tang
Li
L
Rao
D016880:Anisotropy; D016477:Artifacts; D004058:Diffusion; D004452:Echocardiography / Q000379:methods; D007089:Image Enhancement; D007091:Image Processing, Computer-Assisted; D012680:Sensitivity and Specificity; D014463:Ultrasonography / Q000379:methods*