3）内部回声：每个器官都有其固有的内部回声(internal echo)规律，其回声规律改变时， 则预示着有病变的存在，而通过对这些内部回声的分析，可对不同的病变做出诊断。
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homogeneous internal echo pattern 均匀性内回声图
complex internal echo pattern 复合型内回声
uneven internal echo 内部回声不均匀
homogenous internal echo 内部回声不均匀
Internal Echo Nonuniform 内部回声不均匀
lower amplitude internal echo 释义低振幅内回波
Results Colour ultrasound could show the size, appearance, presence or absence of nodules, internal echo, blood flow distribution of thyroid and so on.
结果表明彩超可清晰地显示甲状腺大小、形态、结节的有无，内部回声及血流分布等。
Methods The manifestation, internal echo, the L/T ratio, CDFI and RI frequency spectrum feature of the superficial lymph nodes were studied with high frequency and color Doppler ultrasound 89 cases.
方法本组89例，应用高频率的彩色多谱勒超声检查肿大淋巴结的形态及内部回声、纵横比（L/T）、彩色多谱勒血流显像（CD FI）及阻力指数（RI）的频谱特征。
Methods 23 cases were examined by ultrasound to assess the location, extension and internal echo structure of the lesion. The results of ultrasonography were compared with those of surgery findings.
方法：采用超声仪探查23例患儿病变区的位置、大小形态和内部回声情况，并将结果与手术及病理发现相比较。
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