Title :
Preparation and characterization of Poly(Vinyl-Alcohol) phantoms mimicking fibrous tissue
Author :
Dawson, Andrew ; Gouws, Gideon ; Harris, Paul
Author_Institution :
Sch. of Chem. & Phys. Sci., Victoria Univ. of Wellington, Wellington, New Zealand
Abstract :
Microstructured PVA phantoms mimicking fibrous tissue have been made using a simple freeze casting process. SEM images reveal highly anisotropic microstructure with dimensions of the order of 5-20 um. Characterization of a sample from 20-50 MHz reveals a constant velocity of 1560 ms-1 and an attenuation coefficient slope of approximately 0.25 dB/(mm-MHz).
Keywords :
biomedical materials; biomimetics; casting; freezing; phantoms; polymers; ultrasonic absorption; ultrasonic velocity; SEM images; attenuation coefficient slope; fibrous tissue; freeze casting process; frequency 20 MHz to 50 MHz; highly anisotropic microstructure; microstructured PVA phantoms; poly(vinyl alcohol) phantoms; ultrasonic velocity; Anisotropic magnetoresistance; Casting; Chemical processes; Crystal microstructure; Ice thickness; Imaging phantoms; Nitrogen; Polymers; Scattering; Slurries; PVA; anisotropic microstructure; tissue phantom;
Conference_Titel :
Ultrasonics Symposium (IUS), 2009 IEEE International
Conference_Location :
Rome
Print_ISBN :
978-1-4244-4389-5
Electronic_ISBN :
1948-5719
DOI :
10.1109/ULTSYM.2009.5441397
