The diagnosis of ascites by ultrasonic tomography (B-scan)

Ultrasonic tomography permits the two-dimensional demonstration of the difference in density of the soft tissues, making possible the identification and localization of free fluid in the abdominal cavity. Liquid is seen in the ultrasonic tomogram as an echo-free zone. In deciding whether or not to operate or in planning the type of radiation therapy, the diagnosis or exclusion of ascites is of particular value in those patients where abdominal metastases are considered likely. Very small amounts of ascites can be diagnosed quickly and without stress for the patient, and by using ultrasonic visualization, fluid for cytological examination can be withdrawn safely.