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Related Experiment Videos

Renal duplication artifact in US imaging.

W D Middleton1, G L Melson

  • 1Mallinckrodt Institute of Radiology, Washington University School of Medicine, St Louis, MO 63110.

Radiology
|November 1, 1989
PubMed
Summary
This summary is machine-generated.

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Artifactual renal duplication in ultrasound imaging is caused by sound beam refraction, often seen in the left kidney and obese patients. Understanding this artifact helps radiologists prevent diagnostic errors.

Area of Science:

  • Radiology
  • Medical Imaging
  • Ultrasound Physics

Background:

  • Renal duplication can be a diagnostic challenge in ultrasound (US) imaging.
  • Artifacts can mimic true anatomical variations, leading to misdiagnosis.

Purpose of the Study:

  • To identify the appearance and cause of artifactual renal duplication in ultrasound (US) imaging.
  • To determine the frequency and predisposing factors for this artifact.

Main Methods:

  • Analysis of 22 cases of artifactual renal duplication in 20 patients.
  • Scanning of 50 additional patients to assess artifact frequency.
  • In vitro modeling to elucidate the cause of the artifact.

Main Results:

  • The artifact presented as collecting system duplication (18 cases), suprarenal mass (3 cases), or upper-pole cortical thickening (1 case).

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  • It was more common in the left kidney (15 patients) than the right (3 patients) or bilaterally (2 patients).
  • The artifact was identified in 8 of 50 additional scanned patients, indicating a significant frequency.

    • Conclusions:

    • Artifactual renal duplication is caused by sound beam refraction between adjacent structures (spleen/liver and fat).
    • This artifact is more prevalent in the left kidney and in obese individuals.
    • Awareness of this US artifact is crucial for accurate renal imaging and avoiding diagnostic errors.