Phase velocity and normalized broadband ultrasonic attenuation in Polyacetal cuboid bone-mimicking phantoms.
The variations of phase velocity and normalized broadband ultrasonic attenuation (nBUA) with porosity were investigated in Polyacetal cuboid bone-mimicking phantoms with circular cylindrical pores running normal to the surface along the three orthogonal axes. The frequency-dependent phase velocity and attenuation coefficient in the phantoms with porosities from 0% to 65.9% were measured from 0.65 to 1.10 MHz. The results showed that the phase velocity at 880 kHz decreased linearly with porosity, whereas the nBUA increased linearly with porosity. This study provides a useful insight into the relationships between ultrasonic properties and porosity in bone at porosities lower than 70%.
Lee
Kang Il
KI
Department of Physics, Kangwon National University, Chuncheon 200-701, Republic of Korea.
Choi
Min Joo
MJ
D000080:Acetals; D001842:Bone and Bones / Q000502:physiology*; D005583:Fourier Analysis; D006801:Humans; D019047:Phantoms, Imaging; D011108:Polymers; D014465:Ultrasonics; D014867:Water
D000080:Acetals; D011108:Polymers; D014867:Water; C016067:polyacetal