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Fig. 2 —53-year-old man with hepatocellular carcinoma. Screen shot shows setting windows for virtual CT sonography. Main window shows transverse CT image at xiphoid level. Broken lines and cross-point in main window indicate axial, coronal, or sagittal central axes and center point. In workstation, positions of caliper cursor and transducer are aligned as common point at xiphoid level on skin. When user chooses OK, virtual display begins.