Adaptive parameter selection scheme for nonlinear simulations using field II with operator splitting
Fox, P. and Tranquart, F. (2006) Adaptive parameter selection scheme for nonlinear simulations using field II with operator splitting. Ultrasound in Medicine and Biology, 32, (5), P275-P276. (doi:10.1016/j.ultrasmedbio.2006.02.1264).
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Objectives: Understanding and simulating nonlinear pulse propagation
is of increasing interest in current ultrasound research. This article
gives an adaptive parameter selection scheme for selecting parameters
needed when the Field II linear propagation simulator is combined with
operator splitting to enable nonlinear propagation simulations.
Methods: The general Field II/operator splitting technique was introduced
in [1, 2], requiring the selection of various geometrical parameters
associated with virtual propagating planes. At that stage these
needed to be selected essentially by an iterative trial-and-error technique
for a particular transducer geometry, frequency and focussing
scheme. Whilst careful parameter selection could provide satisfactory
results over a limited propagation range for a given transducer, excitation
and focussing scheme, an automated parameter selection method
for the general case was still lacking.
Results: The paper provides an adaptive method for selecting the
required parameters as a function of the varying harmonic and spatial
properties of the nonlinear pulse as it propagates through the medium.
Conclusions: The method is fully derived and the significant improvement
in the simulator’s performance is demonstrated by comparison to
previous results in [1, 2].
|Subjects:||R Medicine > R Medicine (General)
T Technology > TA Engineering (General). Civil engineering (General)
|Divisions:||University Structure - Pre August 2011 > Institute of Sound and Vibration Research > Fluid Dynamics and Acoustics
|Date Deposited:||01 Feb 2007|
|Last Modified:||02 Mar 2012 13:51|
|Contributors:||Fox, P. (Author)
Tranquart, F. (Author)
|RDF:||RDF+N-Triples, RDF+N3, RDF+XML, Browse.|
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