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In general, a single-input-single-output (SISO) Volterra series cannot be used for modeling component of ultraharmonic frequency from ultrasound echo signal. In this paper we present a new method for modeling the ultraharmonic component based on a SISO Volterra filter with exciting input signal at half-fundamental frequency. Results from the approach of the SISO Volterra show capability for successful...
Analysis only in filter transfer function of Volterra systems is sufficient but maybe not faultless. For this paper the identification procedures of subharmonic oscillations of ultrasound contrast agent (UCA) is described and considered impulse response functions (IRFs). The method for system identification is based on multiple-input-multiple-output (MIMO) Volterra series representation. In this work...
This paper proposes the implementation of multiple-input-single-output (MISO) 3rd-order Volterra series for improving the accuracy of subharmonic oscillation modeling from simulated ultrasound contrast agent (UCA). Results show the good prediction capability of the 3rd-order Volterra model. Its performance is evaluated using the normalized mean-square errors (NMSE) under different levels of noise...
Subharmonic imaging promises to improve ultrasound imaging quality due to an increasing contrast-to-tissue ratio (CTR). However, to improve image quality, signal processing techniques for maximizing subharmonic signal are needed. In this work, we present the pulse inversion linear bandpass filter (PILBF) method for detection of sub harmonic components in order to separate signals from microbubble...
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