| 摘要 |
<p>The method of imaging the nonlinear components of ultrasound echo signals returned from scatterers comprises the steps of constructing a double-pulse excitation waveform, the two pulses composing this waveform having spectra with known relative frequency dependencies, differing in amplitude and phase so that the double-pulse waveform can be considered as a convolution of any single of said pulses with a known coding function, transmitting said double-pulse waveform within a single transmission of an ultrasound beam in the direction of said scatterers, deconvolving the received rf-waveform by a first appropriate decoding function to obtain a new rf-waveform, deconvolving said received rf-waveform by a second and different appropriate decoding function to obtain another rf-waveform, realigning in time both deconvolved rf-waveforms obtained from the same returned echo signal by a time delay as determined by the transmit-coding function, normalizing amplitudes and taking the sum of both rf-waveforms to effectively cancel all echo components caused by linear scatterers. <IMAGE></p> |
