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Comparison of radiography and computed tomography for determining tracheal diameter and length in dogs
James E Montgomery1, Kyle G Mathews, Denis J Marcellin-Little
1Western College of Veterinary Medicine, University of Saskatchewan, Saskatoon, SK, Canada.
Objective:
To compare radiographic and computed tomography (CT) measurements of tracheal size as would be made for the purpose of tracheal stent size selection.
Study Design:
Cross-over.
Animals:
Dogs (n = 15).
Methods:
Canine cadavers without evidence of tracheal or respiratory disease were used for CT and digital radiography of the neck and thorax. Three observers each made 3 independent measurements at each of 5 tracheal locations, and also measured tracheal length, on each radiograph and for each CT scan on each cadaver.
Results:
CT tracheal measurements were on average 1.03 mm larger (P < .01) compared with radiographic measurements for all 3 observers.
Conclusions:
Radiographic measurements of the canine trachea consistently underestimate tracheal size, and CT measurements are preferable for selecting tracheal stent size.
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