Inverted contrast medium-urine layering in the canine urinary bladder on computed tomography

Vet Radiol Ultrasound. 2005 Nov-Dec;46(6):502-5. doi: 10.1111/j.1740-8261.2005.00092.x.


Contrast medium-urine layering is routinely identified on transverse computed tomography (CT) images in the urinary bladder following intravesicular or intravenous administration of iodinated contrast medium. The contrast opacified urine typically occupies the dependent portion of the urinary bladder whereas the nonopacified urine layers above it. In this retrospective study, three patients with inverted contrast medium layering following intravenous contrast medium administration are described. A review of this phenomenon in humans is presented and an explanation for similar imaging findings in the dog proposed.

MeSH terms

  • Animals
  • Dog Diseases / diagnostic imaging
  • Dog Diseases / etiology*
  • Dogs
  • Extravasation of Diagnostic and Therapeutic Materials / complications
  • Extravasation of Diagnostic and Therapeutic Materials / diagnostic imaging
  • Extravasation of Diagnostic and Therapeutic Materials / veterinary*
  • Male
  • Tomography, X-Ray Computed
  • Urination Disorders / diagnostic imaging
  • Urination Disorders / etiology
  • Urination Disorders / veterinary*