Title :
A multibandwidth probing method for tissue scattering microstructure characterization
Author :
Rao, N. A H K ; Helguera, M.
Author_Institution :
Center for Imaging Sci., Rochester Inst. of Technol., NY, USA
Abstract :
In medical ultrasound the normalized second intensity moments of the echo signal can depend on the imaging system resolution cell volume (axial and lateral resolution) in addiction to the scattering microstructure. The authors propose a multibandwidth probing technique in an attempt to separate the two. Theoretical relationships between second intensity moments, (scattering coefficients, scatterer spacing, and its randomness) and the system´s cell volume are stablished. Experiments on water filled sponge structures with pore size varying from .5 mm to 2 mm and pig liver tissue are performed. The slope and intercept values from normalized second intensity moments versus (cell volume)-1 graph are shown to be of diagnostic value in structure characterization
Keywords :
biomedical ultrasonics; image resolution; liver; ultrasonic scattering; 0.5 to 2 mm; axial resolution; cell volume; echo signal; imaging system resolution cell volume; lateral resolution; medical diagnostic technique; medical ultrasound; multibandwidth probing method; normalized second intensity moments; pig liver tissue; pore size; scatterer spacing; scattering coefficients; tissue scattering microstructure characterization; water filled sponge structures; Acoustic scattering; Bandwidth; Diffraction; Frequency estimation; Image resolution; Low pass filters; Microstructure; Rayleigh scattering; Signal resolution; Ultrasonic imaging;
Conference_Titel :
Ultrasonics Symposium, 1997. Proceedings., 1997 IEEE
Conference_Location :
Toronto, Ont.
Print_ISBN :
0-7803-4153-8
DOI :
10.1109/ULTSYM.1997.661792
