Diagnosis of Urethral Flow Parameters by Ultrasonic Backscatter

Earlier reported tests have demonstrated that sufficient ultrasonic scattering can be obtained from particulate matter in urine during voiding to be of value as a transcutaneous diagnostic technique for the lower urinary tract. In this paper, we compare theoretical scattering computations for urethral flow models with data obtained from scattering measurements on the urethra and on physical models. The results indicate that urethral parameters such as the average urine velocity, extent of turbulence, and urethral diameter as a function of position along the tract, including the location of any strictures, can be determined remotely by ultrasonic means.