Transrectal ultrasonotomography of the canine prostate.

We developed a new scanner for transrectal ultrasonotomography of the canine prostate. Using this scanner, a clear horizontal tomogram of the canine prostate was obtained for cross sections at every 2 mm. Prostatic volume was estimated as the sum of the volume of each section. Accordingly, the weight of the canine prostate could be accurately calculated from the volume and the specific gravity of the prostate.