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Dynamic helical CT of the abdomen: prospective comparison of pre- and postprandial contrast enhancement.

Publication ,  Journal Article
Sheafor, DH; Keogan, MT; DeLong, DM; Nelson, RC
Published in: Radiology
February 1998

PURPOSE: To investigate effects of a liquid meal on contrast material enhancement at dynamic helical computed tomography (CT). MATERIALS AND METHODS: Twenty healthy, fasting subjects underwent intravenous injection of nonionic contrast material at 4 mL/sec. Axial CT sections were obtained at a single level 15 seconds after injection, then every 5 seconds for 2 minutes. This protocol was repeated 1 week later, after ingestion of a 360-calorie liquid meal. Hepatic, splenic, and aortic attenuation were measured before and after contrast material administration. Peak enhancement level, time to peak enhancement, slope of hepatic enhancement, and hepatic, splenic, and aortic enhancement ratios were determined. RESULTS: Postprandial time to peak enhancement was 4.4 seconds earlier than preprandial (59.6 seconds +/- 9.0 [1 standard deviation] vs 64.0 seconds +/- 9.5; P < .02). No differences in maximum attenuation were found (P > .27). Postprandial maximum slope of hepatic enhancement and temporal and quantitative enhancement characteristics in aorta and spleen did not significantly differ. Postprandial hepatic-to-splenic enhancement ratios increased (P = .04), and aortic-to-hepatic ratios decreased (P = .01). Aortic-to-splenic ratios did not differ (P = .45). CONCLUSION: A liquid meal before intravenous injection of contrast material produces more rapid peak hepatic enhancement, with slightly increased relative hepatic enhancement. A patient's dietary status, however, should not influence the CT protocol.

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Published In

Radiology

DOI

ISSN

0033-8419

Publication Date

February 1998

Volume

206

Issue

2

Start / End Page

359 / 363

Location

United States

Related Subject Headings

  • Tomography, X-Ray Computed
  • Time Factors
  • Spleen
  • Prospective Studies
  • Postprandial Period
  • Nuclear Medicine & Medical Imaging
  • Male
  • Liver
  • Iopamidol
  • Image Processing, Computer-Assisted
 

Citation

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Sheafor, D. H., Keogan, M. T., DeLong, D. M., & Nelson, R. C. (1998). Dynamic helical CT of the abdomen: prospective comparison of pre- and postprandial contrast enhancement. Radiology, 206(2), 359–363. https://doi.org/10.1148/radiology.206.2.9457186
Sheafor, D. H., M. T. Keogan, D. M. DeLong, and R. C. Nelson. “Dynamic helical CT of the abdomen: prospective comparison of pre- and postprandial contrast enhancement.Radiology 206, no. 2 (February 1998): 359–63. https://doi.org/10.1148/radiology.206.2.9457186.
Sheafor DH, Keogan MT, DeLong DM, Nelson RC. Dynamic helical CT of the abdomen: prospective comparison of pre- and postprandial contrast enhancement. Radiology. 1998 Feb;206(2):359–63.
Sheafor, D. H., et al. “Dynamic helical CT of the abdomen: prospective comparison of pre- and postprandial contrast enhancement.Radiology, vol. 206, no. 2, Feb. 1998, pp. 359–63. Pubmed, doi:10.1148/radiology.206.2.9457186.
Sheafor DH, Keogan MT, DeLong DM, Nelson RC. Dynamic helical CT of the abdomen: prospective comparison of pre- and postprandial contrast enhancement. Radiology. 1998 Feb;206(2):359–363.
Journal cover image

Published In

Radiology

DOI

ISSN

0033-8419

Publication Date

February 1998

Volume

206

Issue

2

Start / End Page

359 / 363

Location

United States

Related Subject Headings

  • Tomography, X-Ray Computed
  • Time Factors
  • Spleen
  • Prospective Studies
  • Postprandial Period
  • Nuclear Medicine & Medical Imaging
  • Male
  • Liver
  • Iopamidol
  • Image Processing, Computer-Assisted