Spatial correlation coefficient images for ultrasonic detection

Raina Cepel, K. C. Ho, Brett A. Rinker, Donald D. Palmer, Terrence P. Lerch, Steven P. Neal

Research output: Contribution to journalArticlepeer-review

7 Scopus citations


In ultrasonics, image formation and detection are generally based on signal amplitude. In this paper, we introduce correlation coefficient images as a signalamplitude independent approach for image formation. The correlation coefficients are calculated between A-scans digitized at adjacent measurement positions. In these images, defects are revealed as regions of high or low correlation relative to the background correlations associated with noise. Correlation coefficient and C-scan images are shown to demonstrate fiat-bottom-hole detection in a stainless steel annular ring and crack detection in an aluminum aircraft structure.

Original languageEnglish
Pages (from-to)1841-1849
Number of pages9
JournalIEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
Issue number9
StatePublished - Sep 2007


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