Renal ultrasonography in healthy cats.

Serial ultrasonographic examinations were performed on the kidneys of 10 healthy cats during normal hydration and after administration of contrast medium. Differences in the appearance of anatomic structures or in the echo intensity were not detected between kidneys during normal hydration and after contrast medium administration. The appearance of scanning images was influenced by mode, frequency, and focal range of the transducer, topography and mobility of the kidneys, and adequate sound conduction.