None
Authors: Lucas Merabet (CEA LIST) , Sébastien Robert (CEA LIST) , François Cartier (CEA LIST) , Claire Prada (École supérieure de physique et de chimie industrielles de la Ville de Paris)
The Total Focusing Method (TFM) was generalized about ten years ago to deal with complex ray paths involving mode conversions and reflections by the specimen interfaces. The resulting multi-mode imaging allows to fully image crack-type defects. More recently, the time-domain Plane Wave Imaging (PWI) has been explored to perform multi-mode reconstructions with a reduced number of transmissions compared to the TFM. In order to further accelerate the imaging process, we propose to combine the multi-mode PWI with a Fourier-domain reconstruction algorithm, inspired by the method developed by J.-Y. Lu. We show that the proposed f-k algorithm provides images of quality equivalent to that of the time-domain PWI, even reducing some artifacts, while decreasing computation times by a factor up to 13.
Keywords:
How to Cite: Merabet, L. , Robert, S. , Cartier, F. & Prada, C. (2019) “Multi-mode imaging in the Fourier domain for fast reconstruction of crack-like defects”, Review of Progress in Quantitative Nondestructive Evaluation.(0).