Ultrasonogram reticulum. Ultrasonogram of the reticulum of a three-year-old Saanen goat. Ultrasonography was carried out using a 5.0 MHz convex transducer in the left paramedian of the sternal region. 1 Abdominal wall, 2 Reticulum, 3 Abomasum, Cr Cranial, Cd Caudal.