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Gastrointestinal Imaging |
1 From the Departments of Radiology, Lucas MRS Center (R.W.P., L.C.C., C.F.B., M.N.M., R.E.M., R.B., R.B.J.) and Statistics (J.H.), Stanford University, Calif; and Department of Radiology, Veterans Administration Palo Alto Health Care System, Calif (M.N.M.). Received May 4, 2001; revision requested June 22; final revision received May 8, 2002; accepted May 28. R.W.P. supported by a research grant from the Max Kade Foundation. Address correspondence to R.W.P., Department of Radiology, University of Vienna, Währinger Gürtel 18-20, A-1090 Vienna, Austria (e-mail: rupert.prokesch@univie.ac.at).
PURPOSE: To evaluate the utility of curved planar reformations compared with standard transverse images in the assessment of pancreatic tumors.
MATERIALS AND METHODS: Forty-three patients suspected of having pancreatic tumors underwent contrast material–enhanced biphasic multi–detector row computed tomography (CT). Curved planar reformations were generated along the pancreatic duct, common bile duct, and major mesenteric vessels. Three blinded independent readers assessed the curved planar reformations and transverse images separately for the presence of tumor, resectability, and vascular involvement. The results were compared with those of a consensus panel who evaluated the curved planar reformations and transverse images together along with clinical data and surgical findings.
RESULTS: Of 43 patients, 20 had pancreatic malignancies as judged by the consensus panel and proven at biopsy and/or clinical follow-up. For tumor detection, transverse images and curved planar reformations had an average sensitivity of 95.0% and 98.4% (P > .05), respectively, and an average specificity of 90.9% and 91.3% (P > .05), respectively. For tumor resectability, transverse images and curved planar reformations had an average sensitivity of 85.7% and 71.4% (P > .05), respectively, and an average specificity of 85.2% and 84.3% (P > .05), respectively. Average interpretation time was 6.4 minutes with transverse images and 4.1 minutes with curved planar reformations.
CONCLUSION: Curved planar reformations are equivalent to transverse images in the detection of pancreatic tumors and determination of surgical resectability.
© RSNA, 2002
Index terms: Computed tomography (CT), multi–detector row, 770.12119 • Images, analysis • Pancreas, CT, 770.12112, 770.12115, 770.12117, 770.12119 • Pancreas, neoplasms, 770.32
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