Abstract
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.
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 .
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