%0 Conference Proceedings %T Ultrasonic imaging in highly attenuating materials with Walsh-Hadamard codes and the decomposition of the time reversal operator %+ Département Imagerie et Simulation pour le Contrôle (DISC) %+ Ecole Superieure de Physique et de Chimie Industrielles de la Ville de Paris (ESPCI Paris) %A Villaverde, E.L. %A Robert, S. %A Prada, C. %Z Conference of 2016 IEEE International Ultrasonics Symposium, IUS 2016 ; Conference Date: 18 September 2016 Through 21 September 2016; Conference Code:124585 %< avec comité de lecture %B IEEE International Ultrasonics Symposium, IUS %C Tours, France %I IEEE Computer Society %V 2016-November %8 2016 %D 2016 %R 10.1109/ULTSYM.2016.7728744 %K Block codes %K Characterization %K Defects %K Imaging systems %K Nondestructive examination %K Ultrasonic imaging %K Coded transmission %K Decomposition of the time reversal operator %K Defect characterization %K Electronic noise %K High density polyethylene pipes %K Non destructive testing %K Time reversal %K Walsh-Hadamard code %K Ultrasonic testing %Z Physics [physics]Conference papers %X In this work, the total focusing method is used to image defects in a high density polyethylene pipe. The viscoelastic attenuation of this material corrupts the images with a high electronic noise. To improve the image quality, the decomposition of the time reversal operator method is combined with spatial Walsh-Hadamard coded transmissions before calculating the images. %G English %L cea-01811903 %U https://cea.hal.science/cea-01811903 %~ CEA %~ ESPCI %~ PARISTECH %~ DRT %~ CEA-UPSAY %~ PSL %~ UNIV-PARIS-SACLAY %~ CEA-UPSAY-SACLAY %~ LIST %~ ESPCI-PSL %~ GS-ENGINEERING %~ GS-COMPUTER-SCIENCE %~ DIN