(EN) A plurality of frames are generated by performing a pre-scan while sequentially setting a plurality of receive delay data based on a plurality of in vivo sound velocities. An optimum sound velocity calculation unit performs waveform analysis for each luminance waveform along a beam scanning direction on each of the frames. An optimum sound velocity map is obtained by mutually comparing a plurality of results of the waveform analysis of the plurality of frames. A control unit calculates the receive delay data for the main scan on the basis of the optimum sound velocity map. Specifically, waveform analysis for a high luminance portion (peak portion) and waveform analysis for a low luminance portion (recess portion) are performed in the waveform analysis. Thus, an optimum sound velocity map for the high luminance portion and an optimum sound velocity map for the low luminance portion are obtained.
(ZH) 一边依次设定基于多个生物体内音速的多个接收延迟数据一边进行预扫描，由此生成多个帧。在最佳音速运算部中，针对各帧上的沿波束扫描方向的每个亮度波形，执行波形解析。将针对多个帧的多个波形解析结果相互比较，由此求出最佳音速图。在控制部中，基于最佳音速图计算主扫描用接收延迟数据。具体而言，在上述波形解析中，执行高亮度部即峰值部用波形解析以及低亮度部即凹部用波形解析。由此，求出高亮度部用最佳音速图以及低亮度部用最佳音速图。
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