Evaluation of a material parameter extraction algorithm using MRI-based displacement measurements

The performance of an inversion algorithm is investigated when applied to measured displacement data for a determination of the material parameters /sup /spl lambda/+2/spl mu///sub /spl rho// (longitudinal wave velocity squared) and /sup /spl mu///sub /spl rho// (shear wave velocity squared) through...

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Vydáno v:	IEEE transactions on ultrasonics, ferroelectrics, and frequency control Ročník 47; číslo 6; s. 1575 - 1581
Hlavní autoři:	Romano, A.J., Bucaro, J.A., Ehnan, R.L., Shirron, J.J.
Médium:	Journal Article
Jazyk:	angličtina
Vydáno:	New York, NY IEEE 01.11.2000 Institute of Electrical and Electronics Engineers The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Témata:	Acoustical measurements and instrumentation Acoustics Algorithms Biological and medical sciences Data mining Displacement Displacement measurement Exact sciences and technology Excitation Filtering Filtration Fundamental areas of phenomenology (including applications) Imaging phantoms Inversions Investigative techniques, diagnostic techniques (general aspects) Magnetic resonance imaging Magnetic separation Materials testing Medical sciences Miscellaneous. Technology Parameter extraction Physics Radiodiagnosis. Nmr imagery. Nmr spectrometry Shear Time measurement Ultrasonics, quantum acoustics, and physical effects of sound Velocity measurement X-ray imaging Performance evaluation Parameter estimation Filtering Propagation velocity Longitudinal wave Elastic wave Monochromatic radiation Experimental study Nuclear magnetic resonance imaging Heterogeneous wave Algorithm performance Displacement measurement Properties of materials S wave Measurement method Wave velocity Wave number
ISSN:	0885-3010, 1525-8955
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Popis
Shrnutí:	The performance of an inversion algorithm is investigated when applied to measured displacement data for a determination of the material parameters /sup /spl lambda/+2/spl mu///sub /spl rho// (longitudinal wave velocity squared) and /sup /spl mu///sub /spl rho// (shear wave velocity squared) throughout an inhomogeneous test phantom. The vector displacement components throughout a test phantom subject to monochromatic shear excitation measured in time using magnetic resonance imaging (MRI) were temporally Fourier transformed to extract the component of monochromatic excitation, and the data was delivered to the inversion algorithm. A series of inversions is presented demonstrating the effects of subsequent wavenumber filtering, polarization selection, and variation in the size of the incremental volume elements. The resulting performance is assessed, and recommendations for future efforts are discussed.
Bibliografie:	ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 14 content type line 23 ObjectType-Article-1 ObjectType-Feature-2
ISSN:	0885-3010 1525-8955
DOI:	10.1109/58.883546