High-contrast fast Fourier transform acousto-optical tomography of phantom tissues with a frequency-chirp modulation of the ultrasound.
We report new results on acousto-optical tomography in phantom tissues using a frequency chirp modulation and a CCD camera. This technique allows quick recording of three-dimensional images of the optical contrast with a two-dimensional scan of the ultrasound source in a plane perpendicular to the ultrasonic path. The entire optical contrast along the ultrasonic path is concurrently obtained from the capture of a film sequence at a rate of 200 Hz. This technique reduces the acquisition time, and it enhances the axial resolution and thus the contrast, which are usually poor owing to the large volume of interaction of the ultrasound perturbation.
Forget
Benoît-Claude
BC
Laboratoire d'Optique, Centre National de la Recherche Scientifique Unité Propre de Recherche Associée 0005, Université Pierre et Marie Curie Paris, Cedex 05, France.
Ramaz
François
F
Atlan
Michaël
M
Selb
Juliette
J
Boccara
Albert-Claude
AC
D005583:Fourier Analysis; D055095:Optics and Photonics; D019047:Phantoms, Imaging; D014054:Tomography / Q000379:methods*; D014465:Ultrasonics