hypoechoic
Adjective
Meaning
hypoechoic (comparative more hypoechoic, superlative most hypoechoic)
Of low echogenicity.
Examples
Tendon fibers appear hyperechoic (bright) when the transducer is perpendicular to the tendon, but can appear hypoechoic (darker) when the transducer is angled obliquely.
The IUD is surrounded by a hypoechoic (dark) foreign-body granuloma Perforation: Very rarely, the IUD can move through the wall of the uterus.