...变部位，以到达疗治疾病和增进有机体恢复健康的目的要领学，称为超声疗研学(ultrasonic therapeutics) (五)声影(acoustic shadow) 阻力指数(RI)；⑤ ..
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acoustic shadow elimination 声影消除
Electronic Controlled Acoustic Shadow System 电子控制声影区系统
acoustic middle shadow 中央部声影
When a sound source lies to one side of the head, the ear on the opposite side lies within the head's acoustic shadow.
当声源位于头部的一侧，另一侧的耳朵在头部的声影。
Results Among 21 cases presented hyperechogenic on ultrasonography. There were 18 cases with acoustic shadow and all calculi moved as position changed.
结果在21例睾丸鞘膜腔内结石的超声表现中，21例均为强光团，18例后伴声影，21例强光团均可移动。
Conclusion The major characteristics of calculi in the cavity of perididymis on ultrasonography are hyperechogenic with acoustic shadow and calculi moved as position changed.
结论强光团、后伴声影、可移动是睾丸鞘膜腔内结石的主要超声征像。
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