Ultrasound Backscatter in Fresh and Thawed Animal Tissue

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Abstract
Initial tests have shown that the backscatter is highly dependent on the rate of freezing, and the number of times a sample was frozen. The changes in backscatter are primarily due to the presence of numerous small cavities in the tissues caused by formation of ice cyrstals and dissolved air which comes out of solution during the freezing process. The size and number of these cavities and thus the amplitude distribution of tissue noise is dependent on the rate of freezing. The backscatter property may be applied to quality control and inspection of fish and meat.

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