Numerical modeling of harmonic imaging and pulse inversion fields
Numerical modeling of harmonic imaging and pulse inversion fields
Tissue Harmonic Imaging (THI) and Pulse Inversion (PI) Harmonic Imaging exploit the harmonics generated as a result of nonlinear propagation through tissue to improve the performance of imaging systems. A 3D finite difference model, that solves the KZK equation in the frequency domain, is used to investigate the finite amplitude fields produced by rectangular transducers driven with short pulses and their inverses, in water and homogeneous tissue. This enables the characteristic of the fields and the effective PI field to be calculated. The suppression of the fundamental field in PI is monitored, and the suppression of side lobes and a reduction in the effective beamwidth for each field are calculated. In addition, the differences between the pulse and inverse pulse spectra resulting from the use of very short pulses are noted, and the differences in the location of the fundamental and second harmonic spectral peaks observed.
2436
Humphrey, V.F.
23c9bd0c-7870-428f-b0dd-5ff158d22590
Duncan, T.M.
fbcb4fc6-dd71-42a2-bf3e-42f057091381
Duck, F.A.
a1178433-533c-4547-8710-3413f044a119
2003
Humphrey, V.F.
23c9bd0c-7870-428f-b0dd-5ff158d22590
Duncan, T.M.
fbcb4fc6-dd71-42a2-bf3e-42f057091381
Duck, F.A.
a1178433-533c-4547-8710-3413f044a119
Humphrey, V.F., Duncan, T.M. and Duck, F.A.
(2003)
Numerical modeling of harmonic imaging and pulse inversion fields.
Journal of the Acoustical Society of America, 114 (4), .
Abstract
Tissue Harmonic Imaging (THI) and Pulse Inversion (PI) Harmonic Imaging exploit the harmonics generated as a result of nonlinear propagation through tissue to improve the performance of imaging systems. A 3D finite difference model, that solves the KZK equation in the frequency domain, is used to investigate the finite amplitude fields produced by rectangular transducers driven with short pulses and their inverses, in water and homogeneous tissue. This enables the characteristic of the fields and the effective PI field to be calculated. The suppression of the fundamental field in PI is monitored, and the suppression of side lobes and a reduction in the effective beamwidth for each field are calculated. In addition, the differences between the pulse and inverse pulse spectra resulting from the use of very short pulses are noted, and the differences in the location of the fundamental and second harmonic spectral peaks observed.
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Published date: 2003
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Local EPrints ID: 10342
URI: http://eprints.soton.ac.uk/id/eprint/10342
ISSN: 0001-4966
PURE UUID: eab6aa59-35f0-4ec1-a914-31ea9ce947e4
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Date deposited: 01 Aug 2005
Last modified: 12 Dec 2021 03:24
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Author:
T.M. Duncan
Author:
F.A. Duck
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