Non-destructive detection of the spoilage of aseptically-packed milk products: The effect of frequency and imaging parameters on the sensitivity of ultrasound imaging

Gun Wirtanen, Raija Ahvenainen, Tiina Mattila-Sandholm

Research output: Contribution to journalArticleScientificpeer-review

9 Citations (Scopus)


Frequency (3.75-7.5 MHz), along with other parameters such as dynamic range, echo enhancement and gamma compensation, have a significant effect in ultrasound imaging on the accuracy and rapidity of non-destructive detection of bacterial and enzymatic spoilage in milk products. In this work it was shown that the frequency should not exceed 5 MHz, and that in some cases 3.75 MHz gives better sensitivity. It was found that ultrasound at a frequency of 3. 75-7.5 MHz could not be used to detect spoilage through cardboard. For this purpose, the optimal combination of frequency, dynamic range, echo enhancement and gamma compensation needs to be determined.
Original languageEnglish
Pages (from-to)126-132
JournalLWT - Food Science and Technology
Issue number2
Publication statusPublished - 1992
MoE publication typeA1 Journal article-refereed


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