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Fig. 3C —70-year-old woman with macroregenerative nodule (arrow) in
cirrhotic liver. Quantitative analysis of sonography videotape intensity in
selected frames grabbed from digital cine clips recorded during arterial
phase, 30 sec after microbubble contrast agent injection. Another ROI is
positioned outside picture to register sonography videotape intensity of
background at constant level (35-40 gray-scale levels) in each analyzed frame.
Objective conspicuity of tumor was -0.96.
