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The gallbladder is easily imaged with ultrasound because it is fluid filled. The gallbladder is generally round to oval; however, it may be bilobed, particularly in cats, and this is generally of no clinical consequence (see Figure 8.4C). Several artifacts are common when scanning the gallbladder, due to its fluid‐filled nature, and the novice sonographer should become familiar with these artifacts in order to minimize misinterpretations. These include acoustic enhancement, side‐lobe artifact, edge shadowing artifact, and mirror image artifact (when the gallbladder contacts the diaphragm–lung interface).