Figure 3. A subtle metastasis in segment 7 of the right lobe of the liver (arrow). (a) 2.5 mm axial slices displayed as acquired directly from the multislice CT scanner. (b) 1.0 cm axial slices produced by summating four 2.5 mm axial slice acquisitions, as sent to PACS. The metastasis is not seen on the summated thicker section (b).