A 45 year old female presents with a complaint of ...

The gallbladder is usually visualized from this position (Figure 3). It is a hypoechoic (black) structure with a hyperechoic (white) rim (Figure 4). If there is doubt whether this represents the gallbladder or a vascular structure, color flow can be applied. Occasionally, the gallbladder may not initially be apparent from this view. ................
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