The secondary US can evaluate the parenchymal injuries and the amount of free fluid over time.
后续超声检查在评估实质性损伤和超声的游离液体的量.
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Free fluid will usually appear anechogenic to homogenously hypoechogenic, sometimes with low - level echoes.
游离液体常常表现为无到低回声, 有时候为低水平回声.
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