光滑肌瘤界限清晰，可体现为均质低徊声到高回声，伴后方加强。
Neurofibromas are well defined and may appear homogeneouslyhypoechoic to hyperechoic, with posterior enhancement.
根据斑块声像性质将研究对象分为无斑块组、高回声组和低回声组。
According to the plaque characteristics, objects were divided into non-plaque group, hyperechoic group and hypoechoic group.
眼外肌缺如时ubm在眼球前部不能探测到眼外肌或仅能测及极薄的高回声。
In cases with the absence of extraocular muscle, only could a very thin reflective echo be detected at the ocular anterior segment by UBM.
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