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CT during arterial portography: diagnostic pitfalls.

Publication ,  Journal Article
Nelson, RC; Thompson, GH; Chezmar, JL; Harned, RK; Fernandez, MP
Published in: Radiographics
July 1992

Computed tomography (CT) during arterial portography (CTAP) is an important technique for evaluating the liver before hepatic tumor resection. With this technique, most tumors are of low attenuation compared with that of enhancing parenchyma. At times, low-attenuation lesions are encountered that represent perfusion abnormalities rather than tumor deposits. These perfusion abnormalities can be categorized as (a) those resulting from improper technique; (b) those extending from hilum to capsule (straight-line sign), with or without an obstructing mass; (c) perihilar and periligamentous abnormalities; (d) subcapsular defects (linear or wedge shaped); and (e) those seen with cirrhosis or regenerating nodules. Adjuvant use of delayed CT, magnetic resonance imaging, and intraoperative ultrasound aids in characterization of these nontumorous defects, thereby improving specificity. The authors conclude that when potential candidates are evaluated for hepatic tumor resection, knowledge of the existence of the various diagnostic pitfalls of CTAP and their imaging characteristics is imperative to avoid inadvertent false results.

Duke Scholars

Published In

Radiographics

DOI

ISSN

0271-5333

Publication Date

July 1992

Volume

12

Issue

4

Start / End Page

705 / 718

Location

United States

Related Subject Headings

  • Tomography, X-Ray Computed
  • Preoperative Care
  • Portography
  • Nuclear Medicine & Medical Imaging
  • Liver Neoplasms
  • Humans
  • Hepatic Artery
  • False Positive Reactions
  • False Negative Reactions
  • Colorectal Neoplasms
 

Citation

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MLA
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Nelson, R. C., Thompson, G. H., Chezmar, J. L., Harned, R. K., & Fernandez, M. P. (1992). CT during arterial portography: diagnostic pitfalls. Radiographics, 12(4), 705–718. https://doi.org/10.1148/radiographics.12.4.1321980
Nelson, R. C., G. H. Thompson, J. L. Chezmar, R. K. Harned, and M. P. Fernandez. “CT during arterial portography: diagnostic pitfalls.Radiographics 12, no. 4 (July 1992): 705–18. https://doi.org/10.1148/radiographics.12.4.1321980.
Nelson RC, Thompson GH, Chezmar JL, Harned RK, Fernandez MP. CT during arterial portography: diagnostic pitfalls. Radiographics. 1992 Jul;12(4):705–18.
Nelson, R. C., et al. “CT during arterial portography: diagnostic pitfalls.Radiographics, vol. 12, no. 4, July 1992, pp. 705–18. Pubmed, doi:10.1148/radiographics.12.4.1321980.
Nelson RC, Thompson GH, Chezmar JL, Harned RK, Fernandez MP. CT during arterial portography: diagnostic pitfalls. Radiographics. 1992 Jul;12(4):705–718.
Journal cover image

Published In

Radiographics

DOI

ISSN

0271-5333

Publication Date

July 1992

Volume

12

Issue

4

Start / End Page

705 / 718

Location

United States

Related Subject Headings

  • Tomography, X-Ray Computed
  • Preoperative Care
  • Portography
  • Nuclear Medicine & Medical Imaging
  • Liver Neoplasms
  • Humans
  • Hepatic Artery
  • False Positive Reactions
  • False Negative Reactions
  • Colorectal Neoplasms