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Figure 13d.   Duodenal carcinoma. Pancreatic and portal venous-phase scans (2.5-mm section thickness, 1.3-mm longitudinal reconstruction interval) yield images with good low-contrast resolution. (a-c) Axial (a), coronal (b), and sagittal (c) images show a dilated common bile duct (I) and a duodenal neoplasm (arrows). (d, e) Lateral arterial-phase (d) and anterior venous-phase (e) maximum-intensity projection images show normal vessels.