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Two-dimensional multiplanar and three-dimensional volume-rendered vascular CT in pancreatic carcinoma: interobserver agreement and comparison with standard helical techniques.

Publication ,  Journal Article
Baek, SY; Sheafor, DH; Keogan, MT; DeLong, DM; Nelson, RC
Published in: AJR Am J Roentgenol
June 2001

OBJECTIVE: The purpose of this study was to compare two-dimensional curved multiplanar and three-dimensional reconstructions, routine axial presentations, and combined techniques in the assessment of vascular involvement by pancreatic malignancy. MATERIALS AND METHODS: For 44 patients with known pancreatic malignancy a total of 56 arterial phase helical CT scans were obtained. Targeted pancreatic imaging was performed, and reformatted images were generated. Axial source images, reformatted images, and the combination of axial and reformatted images were interpreted independently by three observers. The observers graded the celiac axis, common and proper hepatic, splenic, gastroduodenal, and superior mesenteric arteries for tumor involvement. Grades of vascular involvement were compared by intra- and interobserver variability analyses. RESULTS: Intraobserver agreement averaged over five vessels was good between the axial and combined techniques for each individual observer (0.64 < or kappa < or = 0.66), but intraobserver agreement was poor between the axial and reformatted (kappa = 0.17 and kappa = 0.31, respectively) and the reformatted and combined techniques (kappa = 0.31 and kappa = 0.38, respectively) for two observers. For grading of vascular involvement in each vessel, intraobserver agreement was good to excellent between the axial and combined techniques (0.48 or = kappa < or = 0.82). Interobserver agreement averaged over five vessels was poor for imaging techniques except between observer 2 and observer 3 on the axial (kappa = 0.47) and combined techniques (kappa = 0.47). For grading of vascular involvement in each vessel, interobserver agreement for reformatted technique was poor (0.09 < or = kappa < or = 0.40). CONCLUSION: Multiplanar and volume-rendered techniques showed the highest intra- and interobserver variability in grading vascular involvement by pancreatic malignancy. These images should be used in combination with routine axial images to decrease observer variability.

Duke Scholars

Published In

AJR Am J Roentgenol

DOI

ISSN

0361-803X

Publication Date

June 2001

Volume

176

Issue

6

Start / End Page

1467 / 1473

Location

United States

Related Subject Headings

  • Vascular Neoplasms
  • Tomography, X-Ray Computed
  • Pancreatic Neoplasms
  • Observer Variation
  • Nuclear Medicine & Medical Imaging
  • Neoplasm Invasiveness
  • Imaging, Three-Dimensional
  • Image Processing, Computer-Assisted
  • Humans
  • 3202 Clinical sciences
 

Citation

APA
Chicago
ICMJE
MLA
NLM
Baek, S. Y., Sheafor, D. H., Keogan, M. T., DeLong, D. M., & Nelson, R. C. (2001). Two-dimensional multiplanar and three-dimensional volume-rendered vascular CT in pancreatic carcinoma: interobserver agreement and comparison with standard helical techniques. AJR Am J Roentgenol, 176(6), 1467–1473. https://doi.org/10.2214/ajr.176.6.1761467
Baek, S. Y., D. H. Sheafor, M. T. Keogan, D. M. DeLong, and R. C. Nelson. “Two-dimensional multiplanar and three-dimensional volume-rendered vascular CT in pancreatic carcinoma: interobserver agreement and comparison with standard helical techniques.AJR Am J Roentgenol 176, no. 6 (June 2001): 1467–73. https://doi.org/10.2214/ajr.176.6.1761467.
Baek, S. Y., et al. “Two-dimensional multiplanar and three-dimensional volume-rendered vascular CT in pancreatic carcinoma: interobserver agreement and comparison with standard helical techniques.AJR Am J Roentgenol, vol. 176, no. 6, June 2001, pp. 1467–73. Pubmed, doi:10.2214/ajr.176.6.1761467.

Published In

AJR Am J Roentgenol

DOI

ISSN

0361-803X

Publication Date

June 2001

Volume

176

Issue

6

Start / End Page

1467 / 1473

Location

United States

Related Subject Headings

  • Vascular Neoplasms
  • Tomography, X-Ray Computed
  • Pancreatic Neoplasms
  • Observer Variation
  • Nuclear Medicine & Medical Imaging
  • Neoplasm Invasiveness
  • Imaging, Three-Dimensional
  • Image Processing, Computer-Assisted
  • Humans
  • 3202 Clinical sciences