In vitro gray scale echography of protein-lipid fluid collections in liver tissue

Three types of protein‐lipid fluid collections–homogenized milk, buttermilk, and yogurt –were studied in liver tissue by in vitro gray scale echography. These fluid collections are capable of producing internal echoes, dampened sound transmission, partial acoustic “shadows,” and ill‐defined interfaces with hepatic parenchyma. Such effects may preclude universal detection of purulent hepatic abscesses when they contain similar types of substances.