Development and evaluation of f-k migration methods for fast ultrasonic imaging in solids

Abstract : In this paper, we present two frequency-domain algorithms for 2D imaging in solids, namely Stolt's method and Lu's method, the latter being extended to the 3D imaging with matrix arrays. First, the performances of both frequency-domain methods are evaluated in 2D imaging and compared with the time-domain plane wave imaging (PWI). Then, Lu's method and PWI are applied to 3D to image a distribution of small porosities in a steel block. 2D and 3D images calculated with the f-k methods are comparable to the PWI images in terms of contrast and spatial resolution while achieving computation times more than 25 times shorter.
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Conference papers
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https://hal-cea.archives-ouvertes.fr/cea-01811902
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Submitted on : Monday, June 11, 2018 - 8:04:11 AM
Last modification on : Thursday, July 4, 2019 - 11:00:06 AM

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L. Merabet, S. Robert, C. Prada. Development and evaluation of f-k migration methods for fast ultrasonic imaging in solids. 2016 IEEE International Ultrasonics Symposium (IUS) , Sep 2016, Tours, France. ⟨10.1109/ULTSYM.2016.7728685⟩. ⟨cea-01811902⟩

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