Title :
Acoustic characteristics of PVA gel
Author :
Hayakawa, K. ; Takeda, S. ; Kawabe, K. ; Shimura, T.
Author_Institution :
Fujitsu Lab. Ltd., Kawasaki, Japan
Abstract :
Polyvinyl (PVA) alcohol gel is a rubbery material with a high water content, an extremely low acoustic attenuation, and an acoustic impedance close to that of the human body. These characteristics make PVA gel a good candidate as an acoustic coupler between the body and probe during ultrasonic diagnosis. Nonlinearity in acoustic-pressure propagation between pressure input and output was measured for PVA gel. Measurements of the acoustic characteristics of PVA gel show that PVA gel has nonlinearity similar to that of water. It also has extremely low attenuation and good impedance matching to the body
Keywords :
acoustic impedance; biomedical ultrasonics; gels; polymers; ultrasonic absorption; acoustic characteristics; acoustic coupler; acoustic impedance; acoustic-pressure propagation nonlinearity; human body; impedance matching; pressure input; pressure output; ultrasonic diagnosis; Acoustic materials; Acoustic measurements; Acoustic propagation; Attenuation; Humans; Impedance; Nonlinear acoustics; Pressure measurement; Probes; Ultrasonic variables measurement;
Conference_Titel :
Ultrasonics Symposium, 1989. Proceedings., IEEE 1989
Conference_Location :
Montreal, Que.
DOI :
10.1109/ULTSYM.1989.67133
