Ultrasonogram of the reticulum. Ultrasonogram of the reticulum of a 37-day-old Swiss Braunvieh calf with ruminal drinking syndrome. The 5.0-MHz linear transducer was held parallel to the sternum in the left lower thoracic area. The reticular content appears heterogeneous and echoic and the honeycomb-like structure of the mucosa can be seen. 1 Abdominal wall, 2 Spleen, 3 Reticular wall, 4 Reticular content, 5 Honeycomb-like structure of the mucosa, Cr Cranial, Cd Caudal.