4O'Malley ME,Boland GW,Wood BJ,et al.Adenocarcinoma of the pancreas:determination of surgical unresectability with thin-section pancreatic-phase helical CT.AJR,1999,173:1512~1518.
5Hough TJ,Raptopoulous V,Siewert B,et al.Teardrop superior m-ensenteric vein:CT sign for unresectable carcinoma of the pancre-as.AJR,1999,173:1509~1512.