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Related Experiment Videos

The CT nephrogram: implications for evaluation of urinary tract disease

H S Saunders1, R B Dyer, R Y Shifrin

  • 1Department of Radiology, Bowman Gray School of Medicine, Winston-Salem, NC 27157-1088, USA.

Radiographics : a Review Publication of the Radiological Society of North America, Inc
|September 1, 1995
PubMed
Summary

Computed tomographic (CT) nephrograms reveal renal disease by showing contrast enhancement in the kidneys. Abnormal CT nephrogram patterns can indicate various conditions, from trauma to vascular or tubular issues.

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Area of Science:

  • Radiology
  • Nephrology
  • Medical Imaging

Background:

  • The urographic nephrogram is a key indicator of renal disease.
  • Cross-sectional imaging, particularly computed tomography (CT), has increased the role of the CT nephrogram in evaluating urinary tract disorders.

Purpose of the Study:

  • To highlight the significance of CT nephrogram patterns in diagnosing renal pathologies.
  • To detail various quantitative and qualitative nephrographic abnormalities detectable by CT.

Main Methods:

  • Evaluation of CT scans to identify and interpret nephrographic patterns.
  • Correlation of specific CT nephrogram findings with underlying renal conditions.

Main Results:

  • CT effectively demonstrates abnormalities like global/segmental absence or persistence, slowed progression, striated, and rim patterns.

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  • Global absence suggests trauma/pedicle injury; segmental absence indicates infarction.
  • Global persistence can be unilateral (stenosis, thrombosis, obstruction) or bilateral (hypotension, tubular issues).
  • Striated patterns are linked to obstruction, pyelonephritis, contusion, thrombosis, or polycystic kidney disease.
  • Rim patterns are associated with infarction, acute tubular necrosis, or venous thrombosis.

    • Conclusions:

    • CT nephrogram analysis is crucial for diagnosing diverse renal functional and structural diseases.
    • Recognizing specific CT nephrogram patterns aids in pinpointing the etiology of renal dysfunction.