Dynamic CT imaging requires imaging of at least four phases: early arterial phase (after 25 s), late arterial phase (pancreatic parenchyma phase) (after 40 s), venous phase (after 70 s), and equilibrium phase (after 180 s) [1]. From the arterial-dominant phase data 3D images (volume rendering: VR) can be prepared and facilitate evaluation of the arterial anatomy and arterial invasion (Fig. 3.2). Also, from the pancreatic parenchyma phase data, reconstruction images such as coronal, sagittal or oblique ones parallel to the pancreatic head and body/tail can be prepared and used to determine tumor spread and vessel invasion since it is also important to evaluate these factors from a viewpoint different from that of transverse images (Figs. 3.3 and 3.4) [4, 5]. Since on pancreas arterial phase dynamic CT images or slab MIP images superimposed with pancreatic parenchyma phase or portal vein phase four 2.5 mm thick slices (10 mm thick) or seven slices (17.5 mm thick) the peripancreatic arteries and veins are depicted continuously along their length in a single cross section, the preoperative vessel anatomy and presence/absence of anatomical variants can be instantly grasped (Fig. 3.5). slab MIP images in the portal venous phase are useful for the evaluation of the normal peripancreatic venous anatomy. They can identify the right colic vein that flows into the gastrocolic trunk (GCT), middle colic vein, jejunal vein that flows into the gastro-epiploic and superior mesenteric veins, and inferior mesenteric vein that flows into the splenic or superior mesenteric vein, as well as evaluate the presence/absence of tumor invasion and of venous dilatation indicating collaterals associated with venous stenosis or occlusion (Figs. 3.6 and 3.7).