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TitleAnisotropic microstructured poly(vinyl alcohol) tissue-mimicking phantoms
Publication TypeJournal Article
Year of Publication2010
AuthorsDawson, A., Harris P.D., and Gouws G.
JournalIEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
Pagination1494 - 1496
Date Published2010
ISSN08853010 (ISSN)
KeywordsAcoustic properties, Anisotropic microstructures, Anisotropy, Attenuation coefficient, biological model, chemistry, echography, Fibrous tissue, Freeze-casting, heart muscle, Histology, human, Human myocardium, Humans, Image quality, letter, Microscopy, Electron, Scanning, Microstructure, Models, Biological, Myocardium, Phantoms, Imaging, polyvinyl alcohol, Scanning electron micrographs, Scanning electron microscopy, Temperature, Tissue, Tissue mimicking phantom, Ultrasonography
AbstractNovel microstructured PVA phantoms mimicking fibrous tissues have been developed using a simple freezecasting process. Scanning electron micrographs reveal highly anisotropic microstructure with dimensions of the order of 5 to 100 m. Characterization of an example phantom revealed acoustic properties consistent with those found in fibrous tissues. At 20 MHz, the velocity measured parallel to the microstructure orientation of 1555 ms-1 was significantly greater than that perpendicular to the microstructure of 1537 ms-1. The attenuation coefficient was measured to be 5 dB·mm-1 and proportional to the 1.6 power of frequency, which is in good agreement with that for normal human myocardium. © 2006 IEEE.

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