hypoechoic

hypoechoic
A region in an ultrasound image in which the echoes are weaker or fewer than normal or in the surrounding regions. [hypo- + echo + -ic]

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hy·po·echo·ic (hi″po-ə-koґik) in ultrasonography, giving off few echoes; said of tissues or structures that reflect relatively few of the ultrasound waves directed at them.

Medical dictionary. 2011.

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