Title :
Construction of limited diffraction beams with Bessel bases
Author_Institution :
Dept. of Physiol. & Biophys., Mayo Clinic & Found., Rochester, MN, USA
Abstract :
Limited diffraction beams have a large depth of field. They could have applications in medical imaging, tissue characterization, Doppler velocity estimation, nondestructive evaluation (NDE) of materials, as well as other physics related areas such as electromagnetics and optics. In this paper, a method is developed that uses limited diffraction beams discovered previously, such as, Bessel beams and X waves, as basis functions to construct new limited diffraction beams that may have practical usefulness. The method is implemented with linear matrix operations. Results show that the method is powerful and can obtain limited diffraction beams that are not intuitive to get directly from solving the wave equation
Keywords :
Bessel functions; biomedical ultrasonics; least squares approximations; matrix algebra; ultrasonic diffraction; ultrasonic imaging; wave equations; Bessel bases; Bessel beams; Doppler velocity estimation; X waves; basis functions; electromagnetics; large depth of field; limited diffraction beams; linear matrix operations; medical imaging; nondestructive evaluation; optics; physics related areas; tissue characterization; wave equation; Apertures; Biological materials; Biomedical imaging; Biophysics; Optical diffraction; Optical materials; Partial differential equations; Physiology; Shape; Structural beams;
Conference_Titel :
Ultrasonics Symposium, 1995. Proceedings., 1995 IEEE
Conference_Location :
Seattle, WA
Print_ISBN :
0-7803-2940-6
DOI :
10.1109/ULTSYM.1995.495816