Title :
Adaptive Wiener filtering for B-mode image improvement
Author :
Hoess, A. ; Ermert, H.
Author_Institution :
Inst. fuer Hochfrequenztechnik, Ruhr-Univ., Bochum, Germany
Abstract :
A new reconstruction method based on Wiener filtering of RF ultrasound echo signals is presented. The algorithm takes into account focusing effects of the transducer, frequency dependent attenuation in biological tissue, and echo signal noise. Since attenuation characteristics in tissue and noise in the images are evaluated individually for every image to be reconstructed, the algorithm effectively becomes adaptive. The application of this special algorithm to ultrasonic images of the skin at 15-65 MHz results in excellent time gain correction, resolution enhancement, and noise reduction
Keywords :
acoustic imaging; adaptive filters; biomedical ultrasonics; image reconstruction; skin; ultrasonic transducers; 15 to 65 MHz; RF ultrasound echo signals; Wiener filtering; adaptive filtering; attenuation characteristics; biological tissue; echo signal noise; frequency dependent attenuation; noise reduction; reconstruction method; resolution enhancement; skin; time gain correction; transducer; ultrasonic images; Attenuation; Biological tissues; Focusing; Frequency dependence; RF signals; Radio frequency; Reconstruction algorithms; Ultrasonic imaging; Ultrasonic transducers; Wiener filter;
Conference_Titel :
Ultrasonics Symposium, 1992. Proceedings., IEEE 1992
Conference_Location :
Tucson, AZ
Print_ISBN :
0-7803-0562-0
DOI :
10.1109/ULTSYM.1992.275881
