Fast total focusing method for ultrasonic imaging

Synthetic aperture focusing technique (SAFT) and total focusing method (TFM) have become popular tools in the field of ultrasonic non destructive testing. In particular, they are employed for detection and characterization of flaws. From data acquired with a transducer array, those techniques aim at...

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Main Authors: Carcreff, Ewen, Dao, Gavin, Braconnier, Dominique
Format: Conference Proceeding
Language:English
Subjects:
Data acquisition
Destructive testing
Flaw detection
Image acquisition
Image reconstruction
Migration
Nondestructive testing
Signal to noise ratio
Ultrasonic testing
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Dao, Gavin
Braconnier, Dominique
description Synthetic aperture focusing technique (SAFT) and total focusing method (TFM) have become popular tools in the field of ultrasonic non destructive testing. In particular, they are employed for detection and characterization of flaws. From data acquired with a transducer array, those techniques aim at reconstructing an image of the inspected object from coherent summations. In this paper, we make a comparison between the standard technique and a migration approach. Using experimental data, we show that the developed approach is faster and offers a better signal to noise ratio than the standard total focusing method. Moreover, the migration is particularly effective for near-surface imaging where standard methods used to fail. On the other hand, the migration approach is only adapted to layered objects whereas the standard technique can fit complex geometries. The methods are tested on homogeneous pieces containing artificial flaws such as side drilled holes.
doi_str_mv 10.1063/1.4940495
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source American Institute of Physics:Jisc Collections:Transitional Journals Agreement 2021-23 (Reading list)
subjects Data acquisition
Destructive testing
Flaw detection
Image acquisition
Image reconstruction
Migration
Nondestructive testing
Signal to noise ratio
Ultrasonic testing
title Fast total focusing method for ultrasonic imaging
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