Gray scale cholecystosonography: an evaluation of accuracy.

The accuracy of gray scale cholecystosonography is evaluated by comparing oral cholecystography and ultrasonography findings on 141 patients. Confirmation of findings by oral cholecystography or surgery was available in 123, and there was agreement by cholecystosonography in 111, for an accuracy of 90%. Of 39 patients with gallstones, 30 were correctly diagnosed by ultrasound. These results represent an improvement in the accuracy of gray scale ultrasonography for evaluation of the gallbladder compared to previous reports and demonstrate the potential usefulness of the procedure for evaluation of the nonvisualized gallbladder.