Title :
Wavefront distortion in ultrasonic imaging
Author :
Waag, Robert C. ; Smith, James F., III ; Sumino, Yoichi
Author_Institution :
Rochester Univ., NY, USA
Abstract :
The influence of wavefront distortion in clinical ultrasonic imaging is examined using a model that represents the received signal as a convolution of the scattering source and the system beam pattern. Assuming the beam pattern can be factored into the product of axial and lateral functions, time jitter with a sinusoidal and a Gaussian distribution is used to show the effect of wavefront distortion on the correlation of the signal across the system aperture. The results illustrate how time jitter couples into beam width to degrade resolution
Keywords :
acoustic imaging; biomedical ultrasonics; patient diagnosis; Gaussian distribution; axial function; beam pattern; beam width; lateral function; model; resolution degradation; scattering source; scattering source pattern; sinusoidal distribution; system beam pattern; time jitter; ultrasonic imaging; wavefront distortion; Apertures; Convolution; Degradation; Distortion; Gaussian distribution; Jitter; Optical coupling; Scattering; Signal resolution; Ultrasonic imaging;
Conference_Titel :
Engineering in Medicine and Biology Society, 1989. Images of the Twenty-First Century., Proceedings of the Annual International Conference of the IEEE Engineering in
Conference_Location :
Seattle, WA
DOI :
10.1109/IEMBS.1989.95787
