High contrast images of defects in food package seals

Catherine H. Frazier, Ayhan Ozguler, Scott A Morris, William D. O'Brien

Research output: Contribution to journalConference articlepeer-review


The detection of smaller channels in packaging seals using an imaging technique displays a single-time gated pressure value from the received RF waveform at each transducer position. The applicability of this technique is demonstrated for plastic and aluminum foil trilaminate films with water or air filled channels. The images are formed with a focused ultrasound transducer scanned over a rectangular grid. The time gate used to create an image is chosen based on where the maximum reflection from the back surface of the material is expected. Images created with this RF sampling (RFS) technique demonstrate higher contrast than other imaging techniques.

Original languageEnglish (US)
Pages (from-to)627-630
Number of pages4
JournalProceedings of the IEEE Ultrasonics Symposium
StatePublished - 1997
EventProceedings of the 1997 IEEE Ultrasonics Symposium. Part 1 (of 2) - Toronto, Can
Duration: Oct 5 1997Oct 8 1997

ASJC Scopus subject areas

  • Acoustics and Ultrasonics


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