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Related Experiment Videos

Computed tomography urography technique, indications and limitations.

Sameh K Morcos1

  • 1Department of Diagnostic Imaging, Northern General Hospital, Sheffield Teaching Hospitals NHS Foundation Trust, Sheffield, UK. sameh.morcos@sth.nhs.uk

Current Opinion in Urology
|December 5, 2006
PubMed
Summary
This summary is machine-generated.

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A limited computed tomography urography (CTU) is sufficient for most patients, offering a safe alternative to conventional intravenous urography. This approach reduces contrast and radiation exposure while providing adequate urinary tract evaluation.

Area of Science:

  • Radiology
  • Medical Imaging
  • Urology

Background:

  • Computed tomography urography (CTU) is a key imaging modality for evaluating the urinary tract.
  • Multiphase CTU provides comprehensive assessment but involves high contrast and radiation doses.
  • Optimizing CTU protocols is crucial for balancing diagnostic yield and patient safety.

Purpose of the Study:

  • To review existing computed tomography urography techniques.
  • To present and advocate for a preferred, limited CTU approach.
  • To compare the efficacy of limited versus multiphase CTU.

Main Methods:

  • Review of literature on various CTU techniques.
  • Description of a limited CTU protocol involving precontrast kidney scans.
  • Excretory phase imaging 5 minutes post-contrast with frusemide administration.

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Main Results:

  • Multiphase CTU requires large contrast volumes (100-150 ml), high radiation, and extensive image interpretation.
  • Frusemide-induced diuresis enhances ureteral depiction in the excretory phase.
  • The author's limited CTU protocol (50 ml contrast, 10 mg frusemide) provides satisfactory urinary tract evaluation with reduced radiation exposure.

Conclusions:

  • Limited CTU is adequate for most patients needing excretory urography.
  • Limited CTU serves as a superior replacement for conventional intravenous urography.
  • Multiphase CTU offers benefits only in a minority of cases.