Noise filtering in the total focusing method by decomposition of the time reversal operator and the virtual array approach

S. Bannouf (1) , S. Robert (2) , O. Casula (1) , C. Prada (3)

1 DISC - Département Imagerie et Simulation pour le Contrôle
2 LIST (CEA) - Laboratoire d'Intégration des Systèmes et des Technologies
3 IL - Institut Langevin - Ondes et Images (UMR7587)

The total focusing method is sometimes described in the literature as the ``gold standard'' compared to conventional ultrasonic imaging techniques. However, this method may suffer from a low signal-to-noise ratio, especially in materials with high structural noise. In this context, we propose a new method of noise filtering based on the decomposition of the time reversal operator and the use of virtual sources.

Keywords: Ultrasonic; Non Destructive Techniques; Noise Filtering

Domains: Physics [physics]

S. Bannouf, S. Robert, O. Casula, C. Prada. Noise filtering in the total focusing method by decomposition of the time reversal operator and the virtual array approach. 39th Annual Review of Progress in Quantitative Nondestructive Evaluation (QNDE), Jul 2012, Denver, United States. pp.857-864, ⟨10.1063/1.4789134⟩. ⟨cea-01828198⟩