Wide-band acoustic spectroscopy of biological material based on a laser-induced grating technique.
A laser-induced transient grating technique enables fast noncontact acoustic measurements on transparent biological materials in a frequency range from tens of megahertz to 1 GHz. We have applied this method to the characterization of bovine vitreous and found high-frequency acoustic attenuation values to be close to those of water, with a quadratic dependence on frequency, in contrast to low-frequency data. The potential of the technique for studying other biological materials, such as human stratum corneum, is demonstrated.
Maznev
A A
AA
Department of Chemistry, Massachusetts Institute of Technology, Cambridge 02139, USA. MAZNEV@MIT.EDU
McAuliffe
D J
DJ
Doukas
A G
AG
Nelson
K A
KA
D000818:Animals; D002417:Cattle; D003315:Cornea / Q000000981:diagnostic imaging; D005583:Fourier Analysis; D006801:Humans; D007834:Lasers; D012867:Skin / Q000000981:diagnostic imaging; D013057:Spectrum Analysis / Q000295:instrumentation / Q000379:methods* / Q000706:statistics & numerical data; D014463:Ultrasonography / Q000295:instrumentation / Q000379:methods*; D014822:Vitreous Body / Q000000981:diagnostic imaging