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Related Concept Videos

Imaging Studies III: Computed Tomography01:27

Imaging Studies III: Computed Tomography

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DefinitionComputed Tomography (CT) of the genitourinary (GU) tract is a non-invasive imaging modality that utilizes X-rays and computer processing to generate detailed cross-sectional images of the urinary system, encompassing the kidneys, ureters, bladder, and adjacent structures such as the adrenal glands.PurposeCT scans of the GU tract serve several diagnostic and therapeutic purposes, including:Diagnosis of Urinary Tract Diseases: Detects kidney stones, tumors, cysts, and congenital...
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Related Experiment Video

Updated: Mar 7, 2026

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Computed Tomographic Findings in Canine Otitis Externa.

Andrea Vila Cabaleiro1,2, Tessa V Procter1, Anita Patel3

  • 1Royal (Dick) School of Veterinary Studies, University of Edinburgh, Roslin, Edinburgh, UK.

Veterinary Radiology & Ultrasound : the Official Journal of the American College of Veterinary Radiology and the International Veterinary Radiology Association
|March 6, 2026
PubMed
Summary
This summary is machine-generated.

Computed tomography (CT) offers a valid diagnostic tool for canine otitis externa (OE), showing substantial agreement with otoscopy. This advanced imaging can assess ear canal structures not visible during otoscopic exams, improving OE diagnosis in dogs.

Keywords:
computed tomographydogsear canal mineralizationears

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Area of Science:

  • Veterinary Medicine
  • Diagnostic Imaging
  • Canine Health

Background:

  • Otitis externa (OE) is a prevalent condition in dogs, commonly diagnosed via otoscopy.
  • Otoscopic examination has limitations in visualizing all external ear canal structures.
  • Computed tomography (CT) is established as a gold standard for evaluating middle ear disease.

Purpose of the Study:

  • To evaluate the diagnostic validity of CT for canine OE.
  • To compare CT findings with otoscopic findings in dogs with suspected OE.

Main Methods:

  • Retrospective review of CT scans from dogs with suspected OE by three blinded observers.
  • Assessment of ear canal wall mineralization, thickness, and contrast enhancement on CT.
  • Comparison of CT findings against otoscopic findings as the reference standard.

Main Results:

  • CT demonstrated high sensitivity (98.2%) and a positive predictive value (84.4%) for OE diagnosis.
  • There was substantial agreement (weighted κ = 0.65) between CT and otoscopic diagnoses of OE.
  • Moderate agreement was found between CT findings (contrast enhancement, wall thickness) and otoscopic observations (erythema, stenosis).
  • Mineralization of the ear canal wall on CT was not significantly correlated with OE presence or duration.

Conclusions:

  • CT is a valid and reliable diagnostic technique for canine OE, with substantial agreement with otoscopy.
  • CT can provide valuable information on ear canal structures not fully assessable by otoscopy.
  • Findings suggest CT can be a valuable adjunct or alternative diagnostic tool for canine OE.