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Value of Curved Planar Reformations in MDCT of Abdominal Pathology

¹ All authors: Department of Radiology, Stanford University School of Medicine, 300 Pasteur Dr., Mail Code 5621, Stanford, CA 94305.

View larger version (109K): [in a new window]   Fig. 1A. —52-year-old man with pancreatic cancer. Axial source image from pancreatic CT shows mass (asterisk) in pancreatic head.

View larger version (132K): [in a new window]   Fig. 1B. —52-year-old man with pancreatic cancer. Curved planar image shows pancreatic duct (arrow) obstructed by low-attenuation cancer in pancreatic head (asterisk).

View larger version (98K): [in a new window]   Fig. 2A. —58-year-old man with small cystic lesion noted incidentally in pancreas on prior CT. Axial source image from dedicated pancreatic CT shows small cystic lesion (arrow), but relationship with main duct cannot be easily discerned.

View larger version (117K): [in a new window]   Fig. 2B. —58-year-old man with small cystic lesion noted incidentally in pancreas on prior CT. Curved planar image shows course of main pancreatic duct and communication with small cyst (arrow).

View larger version (149K): [in a new window]   Fig. 3A. —52-year-old man with incidentally detected annular pancreas. Axial source image shows portion of pancreatic head (arrow) draped atop descending duodenum (asterisk).

View larger version (114K): [in a new window]   Fig. 3B. —52-year-old man with incidentally detected annular pancreas. Curved planar reformation shows pancreatic tissue (arrows) completely encircling duodenum (asterisk).

View larger version (125K): [in a new window]   Fig. 4A. —72-year-old woman with recent episode of choledocholithiasis. Axial source image shows thickened enhancing walls of common bile duct (arrow).

View larger version (100K): [in a new window]   Fig. 4B. —72-year-old woman with recent episode of choledocholithiasis. Curved planar image of common bile duct shows smooth wall thickening (arrowheads) proximally and intrahepatic biliary dilatation. Entire common bile duct is visible on single image. Cytology findings were negative, and biliary dilatation resolved on follow-up CT scan (not shown).

View larger version (183K): [in a new window]   Fig. 5A. —57-year-old man with cholangiocarcinoma. Axial source image shows thickening of walls of common bile duct (arrow).

View larger version (189K): [in a new window]   Fig. 5B. —57-year-old man with cholangiocarcinoma. Curved planar image of common bile duct shows irregular soft-tissue mass (arrowheads) at bifurcation, representing tumor.

View larger version (135K): [in a new window]   Fig. 6A. —72-year-old woman with gastric outlet obstruction. Axial source image shows markedly distended stomach (arrows) and mass in gastric antrum (arrowheads).

View larger version (165K): [in a new window]   Fig. 6B. —72-year-old woman with gastric outlet obstruction. Curved planar image obtained through stomach shows constricting lesion in antrum (arrows) that proved to be gastric carcinoma.

View larger version (128K): [in a new window]   Fig. 7A. —82-year-old woman with epigastric pain. Axial source image shows area of low density in duodenal wall (arrow). Prominent low-density enlarged lymph node (asterisk) is also evident.

View larger version (135K): [in a new window]   Fig. 7B. —82-year-old woman with epigastric pain. Curved planar image shows concentric narrowing of transverse duodenum (arrowheads) that proved to be adenocarcinoma after endoscopic biopsy.

View larger version (108K): [in a new window]   Fig. 8A. —56-year-old man with periampullary mass. Axial source image shows hypervascular periampullary mass (arrow).

View larger version (195K): [in a new window]   Fig. 8B. —56-year-old man with periampullary mass. Curved planar image of duodenum shows hypervascular mass (arrows) within lumen that proved to be gastrointestinal stromal tumor.

View larger version (136K): [in a new window]   Fig. 9A. —48-year-old woman with right lower quadrant pain. Axial source image shows fluid-filled appendiceal tip (arrow) immediately adjacent to small bowel loop.

View larger version (156K): [in a new window]   Fig. 9B. —48-year-old woman with right lower quadrant pain. Curved planar image shows entire appendix with its distended tip (arrowheads) and appendicolith (arrow) on single image.

View larger version (156K): [in a new window]   Fig. 10A. —75-year-old man with rectal carcinoma. Axial image shows enhancing intraluminal rectal mass.

View larger version (146K): [in a new window]   Fig. 10B. —75-year-old man with rectal carcinoma. Curved planar image shows extent of lesion along rectal wall (arrow).

View larger version (160K): [in a new window]   Fig. 11A. —75-year-old man with right-sided abdominal pain. Axial source image at level of mid ureter shows right ureteral calculus (arrow). Additional stone further distal in ureter is not apparent on this image.

View larger version (158K): [in a new window]   Fig. 11B. —75-year-old man with right-sided abdominal pain. Curved planar image shows length of right ureter. Both stones (arrows) are visible on this single image.

View larger version (155K): [in a new window]   Fig. 12A. —68-year-old woman with acute onset of abdominal pain and fullness. Axial source image shows large clot (arrow) distending portal venous confluence.

View larger version (131K): [in a new window]   Fig. 12B. —68-year-old woman with acute onset of abdominal pain and fullness. Curved planar image shows that clot represents thrombosed portal vein aneurysm with clot involving both portal (white arrow) and splenic (black arrow) veins.

View larger version (174K): [in a new window]   Fig. 13A. —82-year-old man with acute abdominal pain. Axial image shows thrombosed superior mesenteric vein (arrow).

View larger version (148K): [in a new window]   Fig. 13B. —82-year-old man with acute abdominal pain. Curved planar image shows length of superior mesenteric vein thrombus (arrowheads).

View larger version (192K): [in a new window]   Fig. 14A. —51-year-old man with peripancreatic lymphoma. Axial image shows bulky lymphadenopathy encasing gastroduodenal artery (arrow).

View larger version (166K): [in a new window]   Fig. 14B. —51-year-old man with peripancreatic lymphoma. Curved planar image shows course of gastroduodenal artery through lymph node mass.

View larger version (135K): [in a new window]   Fig. 15A. —52-year-old man with pancreatic carcinoma. Axial source image shows short segments of splenic artery (arrows) and splenic vein (arrowhead).

View larger version (118K): [in a new window]   Fig. 15B. —52-year-old man with pancreatic carcinoma. Curved planar image along length of splenic artery. When flattened, curved plane described by looping vessel contains distorted representations of other nearby viscera, such as artifactually bivalved kidney. Dotted lines indicate mirror-images artifacts affecting splenic artery.

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