Numerical investigation of non-linear propagation of amplitude-modulated ultrasound pulses in human soft tissues and superharmonic beam optimisation
by Narendra D. Londhe; R.S. Anand
International Journal of Biomedical Engineering and Technology (IJBET), Vol. 8, No. 1, 2012

Abstract: The concept of Superharmonic Imaging (SHI) evolved because of non-linear propagation of ultrasound in biological. In this work, the comparison of fundamental, second and superharmonic components are presented, which is associated with amplitude and propagation distance along on-axis and off-axis as well. The parameters associated with imaging quality are: lateral and axial resolutions; depth of field and Signal to Noise Ratio (SNR). The trade-offs among above-mentioned four aspects of fundamental, second harmonic and superharmonic fields and relating them to system parameters such as aperture size, f-number, focal depth, central frequency and applied pressure help in superharmonic beam optimisation, which further enhances imaging ability.

Online publication date: Fri, 12-Dec-2014

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