Crolla M D, Baert A L, Fevery J, Kerremans R
J Clin Ultrasound. 1978 Jun;6(3):177-9. doi: 10.1002/jcu.1870060313.
The use of gray scale equipment in a prospective study of radiologically non-visualizing gallbladders, permitted detection of a new echographic aspect of gallbladder disease. Along with even, discrete bile thickening and the presence of sand-sized calculi, thickening of the gallbladder wall incholecystitis is another ultrasonographic sign of gallbladder disease that can be visualized successfully by gray scale ultrasound.
