[A simple grid for measurement of gallbladder size by real-time ultrasound (author's transl)].

A grid is introduced which allows simple estimates of gallbladder size from parallel diameters in ultrasonic images. Depending upon the gallbladder's size between 4 and 20 diameters had to be measured. Deviation from true size did not exceed 4%. --A possible use may be the evaluation of the gallbladder's size before and 30--45 minutes after a defined meal.