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An optimized total focusing method based on delay-multiply-and-sum for nondestructive testing
Ultrasonics, 2023Total focusing method (TFM) attracts much interest because of high image resolution and large inspection coverage. However, the synthetic focusing approach based on delay-and-sum beamforming employs only the defect information contained in the dataset while ignoring the spatial information of the array signals, leading to limited imaging performance ...
Lishuai Liu +2 more
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Use of the Total Focusing Method with the Envelope Feature
Materials Evaluation, 2020This paper presents how to compute the envelope of a total focusing method (TFM) image and the benefits of using this TFM envelope as part of a code-compliant solution. The TFM envelope is obtained by computing the norm of two different TFM images; namely, a first TFM image computed using the standard acquired full matrix capture (FMC), and a second ...
Nicholas Badeau +2 more
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Fast total focusing method for ultrasonic imaging
2015 IEEE International Ultrasonics Symposium (IUS), 2015This work deals with advanced and fast imaging techniques using phased array probes for non destructive evaluation or medical imaging. These methods employ a large amount of summations in order to focus at each pixel of the reconstruction image, which often represent a prohibitive computational cost. We present two acceleration methods, i.e.
Ewen Carcreff +2 more
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Fast total focusing method by a migration approach
2015 IEEE Far East NDT New Technology & Application Forum (FENDT), 2015The Total Focusing method is an efficient approach to perform ultrasonic imaging of industrial components. It consists in focusing at each point of a reconstruction area by applying coherent summations. The main issue of this method is the computation time which makes real-time imaging difficult for large images.
Ewen Carcreff +2 more
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Total Focusing Method With Virtual Sources in the Presence of Unknown Geometry Interfaces
IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, 2016Auto-focused virtual source imaging (AVSI) has been recently presented as an alternative method for synthetic aperture focusing through arbitrarily shaped interfaces with arrays. This paper extends the AVSI concept to the case of the total focusing method (TFM-AVSI) using several virtual receivers for each virtual source.
Jorge F CruzA, Jorge Camacho
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Improvement of the total focusing method using an inverse problem approach
2017 IEEE International Ultrasonics Symposium (IUS), 2017Imaging using the total focusing method (TFM) is a popular tool, which is becoming a standard, for nondestructive testing and evaluation. From full matrix capture data, it consists in focusing at each point of a defined reconstruction zone. It is generally more efficient than conventional phased array focusing, which only focuses at a few points ...
Ewen Carcreff +4 more
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A Study of Total Focusing Method for Ultrasonic Nondestructive Testing
Journal of Testing and Evaluation, 2013Abstract Commercial ultrasonic phased array (PA) systems can perform multiple inspections in real-time using array transducers. This approach involves firing array elements in a particular sequence to produce high-resolution images at a high frame rate with excellent signal-to-noise ratio (SNR).
Po-Yen Tseng +5 more
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Acoustic Path Filtering for Improved Multimode Total Focusing Method Inspection
Materials Evaluation, 2023Total focusing method (TFM) is an ultrasonic testing (UT) technique that provides nondestructive testing (NDT) inspectors with new imaging modes, enabling more accurate detection, sizing, and representation of challenging defects. While TFM may offer convenient, nearly true-to-geometry imagery as the inspection result, it is often detrimentally ...
Benoit Lepage, Guillaume Painchard-April
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Simulation of the Application of Compressive Sensing to Ultrasound Total Focusing Method Imaging
2020 15th Symposium on Piezoelectrcity, Acoustic Waves and Device Applications (SPAWDA), 2021In order to lower the sampling rate and to reduce the huge amount of data in imaging of phased array total focus method, an ultrasound detection imaging method is proposed which is based on compressive sensing. The “analog-information converter” (AIC) is introduced into ultrasonic phased array total focus method imaging system, which could recover the ...
Zhi-ying LIU +3 more
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Real-Time Total Focusing Method for Ultrasonic Imaging of Multilayered Object
2018 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), 2018In imaging of multilayered object, total focusing method (TFM) combined with ray-tracing appeals to numerous researchers because of its superior image quality. But lots of iterative computation to calculate the incident points greatly increases its processing time.
Wenkai Cui, Kaihuai Qin
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