Title :
Low Sound Velocity and Acoustic Attenuation Silicone Rubber Lens Based on Nano-Powder-Composite for Medical Echo Ultrasound Array Probes
Author :
Yamashita, Y. ; Hosono, Y. ; Itsumi, K.
Author_Institution :
Toshiba Res. Consulting Co., Kawasaki
Abstract :
Effects of fine nano-powder ceramic powders on the acoustic properties of silicone rubber have been investigated, in order to develop an acoustic lens material with a low sound velocity (c) and a low acoustic attenuation (alpha). Silicone rubber doped with Yb2O3 powders having nanopowder size of 16 nm showed lower alpha than silicone rubber doped with other powders. The silicone rubber doped with Yb2O3 powder showed a density of 1.54 times 103 kg/m3, c=919 m/s, an acoustic impedance Z= 1.42 times 106 kg/m2s, alpha = 1.08 dB/mm/MHz at 25degC. The low c and alpha of the lens material contributes to realize a low loss acoustic lens for medical array probes for diagnostic application.
Keywords :
acoustic impedance; acoustic materials; acoustic wave velocity; bioceramics; biomedical ultrasonics; nanocomposites; nanoparticles; silicone rubber; ultrasonic arrays; ytterbium compounds; Yb2O3; acoustic attenuation silicone rubber lens; acoustic impedance; acoustic lens material; acoustic properties; ceramic powders; diagnostic application; low sound velocity; medical echo ultrasound array probes; nanopowder size; nanopowder-composite; size 16 nm; temperature 25 C; Acoustic arrays; Attenuation; Biomedical acoustics; Lenses; Medical diagnostic imaging; Optical materials; Powders; Probes; Rubber; Ultrasonic imaging;
Conference_Titel :
Applications of Ferroelectrics, 2007. ISAF 2007. Sixteenth IEEE International Symposium on
Conference_Location :
Nara
Print_ISBN :
978-1-4244-1334-8
Electronic_ISBN :
1099-4734
DOI :
10.1109/ISAF.2007.4393391
