EFFECT OF CONTRAST MEDIUM DOSE AND IMAGE ACQUISITION TIMING ON URETERAL OPACIFICATION IN THE NORMAL DOG AS ASSESSED BY COMPUTED TOMOGRAPHY

Authors


  • This study was supported by a grant form the Association Francaise des Vétérinaires des Animaux de Companie (AFVAC).

Address correspondence and reprint requests to P.Y. Barthez, DVM, Department of Veterinary Clinical Sciences, College of Veterinary Medicine, The Ohio State University, Columbus, OH 43210-1089, USA.

Abstract

Computed tomography (CT) excretory urography was performed in five adult female dogs after intravenous injection of a bolus of four different doses of water-soluble iodinated contrast medium (100, 200, 400, and 800 mg1/kg). CT images centered over the urinary bladder were performed before injection and 1,3,5,7,9,11,15,20,25,30,40,50, and 60 minutes after injection. Opacification of both ureters was evaluated by measuring maximum CT number of individual ureters at each time. Time opacification curves were generated for each dose. Best opacification of the ureters was obtained with 400 and 800 mgl/kg, with a constant peak at 3 minutes and durable opacification for 1 hour. Insufficient opacification was obtained with lower dose of 100 and 200 mgI/kg.

Ancillary