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Nonlinear imaging of isoechogenic phantoms using phase conjugation of the second acoustic harmonic |
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| Authors: | L Krutyansky V Preobrazhensky Ph Pernod O Bou Matar |
| Institution: | (1) Laboratoire Europeen Associe en Magneto-Acoustique Nonlineaire de la Matiere Condensee (LEMAC), Russia;(2) Wave Research Center, Prokhorov General Physics Institute, Russian Academy of Sciences, Moscow, 119991, Russia;(3) Institut d’Electronique, de Microelectronique et de Nanotechnologie (IEMN DOAE UMR CNRS 8520) Ecole Centrale de Lille, B.P. 48, 59651 Villeneuve d’Ascq Cedex, France |
| Abstract: | Experiments on nonlinear C-scan acoustic imaging were performed using phase conjugation of the second harmonic of a focused incident beam. This method made it possible to obtain images of objects with close linear properties but with different nonlinear parameters. Nonlinear backward propagation of the conjugate wave was also considered and improvement of the image contrast was demonstrated for this case. The results obtained were generally in agreement with the theoretical predictions. |
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