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Fig. 5. —Graph shows receiver operating characteristic curve analysis for sonography by overall impression (gray-scale = dashed line, gray-scale and power Doppler sonography = upper solid line), internal architecture (gray-scale = lower dotted line, gray-scale and power Doppler sonography = upper dotted line), and short-axis length (lower solid line). Note higher performance by internal architectural assessment compared with that by short-axis diameter assessment.