Nonlinear propagation of sound has been exploited in the last 15 years in medical
ultrasound imaging through tissue harmonic imaging (THI). THI creates an image by filtering …

A fast non-linear pulsed ultrasound field simulation is presented. It is implemented based on
an angular spectrum approach (ASA), which analytically solves the non-linear wave …

Second harmonic imaging systems transmit relatively low frequency pulses, eg, 2.5 MHz,
and image the frequency-doubled second harmonic generated by acoustic nonlinearity …

A method for fast numerical simulation of nonlinear wave propagation based on a quasi-
linear approximation has previously been presented. In the current study this method has …

Nonlinear propagation creates additional high-frequency components in the ultrasound
wave (called harmonics) as the wave is transmitted through tissue. When nonlinear …

Simulations are presented which indicate that imag-ing at the second-harmonic frequency
does not solve the problem of ultrasonic wave aberration. The nonlinearity of acoustic wave …

Tissue Harmonic Imaging (THI) is a new ultrasound imaging technique, which uses the
harmonic components generated by nonlinear acoustic propagation through human tissues …

Finite amplitude sound propagating in a medium undergoes distortion due to the nonlinear
properties of the medium. The nonlinear distortion produces harmonic (and subharmonic) …

A non-linear ultrasound imaging simulation software should be capable of simulating the
non-linear fields for any kind of transducer, focusing, apodization, and attenuation. At …

Theory and simulations are presented indicating that imaging at the second-harmonic
frequency does not solve the problem of ultrasonic wave aberration. The non-linearity of …