title: Experimental implementation of reverse time migration for nondestructive evaluation applications.
abstract: Reverse time migration (RTM) is a commonly employed imaging technique in seismic applications (e.g., to image reservoirs of oil). Its standard implementation cannot account for multiple scattering/reverberation. For this reason it has not yet found application in nondestructive evaluation (NDE). This paper applies RTM imaging to NDE applications in bounded samples, where reverberation is always present. This paper presents a fully experimental implementation of RTM, whereas in seismic applications, only part of the procedure is done experimentally. A modified RTM imaging condition is able to localize scatterers and locations of disbonding. Experiments are conducted on aluminum samples with controlled scatterers.
authors.affiliation: Acoustics Research Group, Department of Physics and Astronomy, Brigham Young University, N283 Eyring Science Center, Provo, Utah 84602, USA. bea@byu.edu
authors.forename: Brian E
authors.initials: BE
authors.lastname: Anderson
authors.forename: Michele
authors.initials: M
authors.lastname: Griffa
authors.forename: Pierre-Yves Le
authors.initials: PY
authors.lastname: Bas
authors.forename: Timothy J
authors.initials: TJ
authors.lastname: Ulrich
authors.forename: Paul A
authors.initials: PA
authors.lastname: Johnson
mesh_terms: D000162:Acoustics / Q000295:instrumentation; D000535:Aluminum; D055119:Elastic Modulus; D004867:Equipment Design; D005583:Fourier Analysis; D005844:Geology / Q000295:instrumentation; D007834:Lasers; D016014:Linear Models; D008962:Models, Theoretical; D009038:Motion; D017711:Nonlinear Dynamics; D012815:Signal Processing, Computer-Assisted; D013016:Sound; D013018:Sound Spectrography; D013232:Steel; D013997:Time Factors; D014159:Transducers; D014732:Vibration
chemical_list: D013232:Steel; D000535:Aluminum