Simulation of ultrasonic imaging with linear arrays in causal absorptive media

Simulation of Ultrasonic Imaging with Linear Arrays in Causal Absorptive Media

Simulation of Ultrasonic Imaging with Linear Arrays in Causal Absorptive Media

Rigorous and efficient numerical methods are presented for simulation of acoustic propagation in a medium where the absorption is described by relaxation processes. It is shown how FFT-based algorithms can be used to simulate ultrasoun,d images in pulse-echo mode. General expressions are obtained for the complex wavenumber in a relaxing medium. A fit to measurements in biological media shows th...

Simulation of Ultrasonic Imaging with Linear Arrays in Causal Absorptive Media

Simulation of ultrasonic imaging with linear arrays in causal absorptive media.

Rigorous and efficient numerical methods are presented for simulation of acoustic propagation in a medium where the absorption is described by relaxation processes. It is shown how FFT-based algorithms can be used to simulate ultrasound images in pulse-echo mode. General expressions are obtained for the complex wavenumber in a relaxing medium. A fit to measurements in biological media shows the...

Statistically stable ultrasonic imaging in random media.

Analysis of array data from acoustic scattering in a random medium with a small number of isolated targets is performed in order to image and, thereby, localize the spatial position of each target. Because the host medium has random fluctuations in wave speed, the background medium is itself a source of scattered energy. It is assumed, however, that the targets are sufficiently larger and/or mo...