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Updated: Oct 30, 2025

Photoacoustic Cystography
Published on: June 11, 2013
Pure cystine and urate calculi can be clearly visible using survey digital radiography
Esther Nell1, Stephen Q Garofolo1, Christopher Ober1
1Department of Veterinary Clinical Sciences, College of Veterinary Medicine, University of Minnesota, 1365 Gortner Avenue, St. Paul, Minnesota 55108, USA.
Abstract:
Cystine and urate calculi are considered nonradiopaque to faintly radiopaque. Two canine cases in which these types of calculi are radiopaque and clearly apparent in vivo on survey digital radiography are described. The densities of cystine and urate calculi, as determined in vitro with computed tomography, are compared to other pure calculi and mixed or compound calculi to further explore the relative attenuation characteristics.
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