PROBLEM TO BE SOLVED: To provide an ultrasound diagnostic imaging apparatus which can obtain a broadband harmonic component by a transmission signal of square wave which can output transmission ultrasound wave with a simple configuration and obtain a good ultrasound image.SOLUTION: A transmitting unit makes an ultrasound probe 2 generate transmission ultrasound waves by outputting each of a first transmission signal which is an asymmetric signal waveform about a time axis, a second transmission signal which is a phase-inverted version of a signal waveform of the first transmission signal, a third transmission signal which is a time-inverted version of the signal waveform of the first transmission signal and a fourth transmission signal which is a phase-inverted and time-inverted version of the signal waveform of the first transmission signal, as a driving signal. A signal component extraction unit 135 extracts a secondary harmonic component and a difference tone component by compounding a first received signal corresponding to the first transmission signal, a second received signal corresponding to the second transmission signal, a third received signal corresponding to the third transmission signal and a fourth received signal corresponding to the fourth transmission signal.COPYRIGHT: (C)2013,JPO&INPIT【課題】簡便な構成で送信超音波を出力可能な矩形波による送信信号によって広帯域の高調波成分を取得し、良好な超音波画像を取得することができる超音波画像診断装置を提供する。【解決手段】送信部は、時間軸で非対称の信号波形である第1の送信信号と、第1の送信信号の信号波形を位相反転させた第2の送信信号と、第1の送信信号の信号波形を時間軸で反転させた第3の送信信号と、第1の送信信号の信号波形を位相反転させて、且つ、時間軸で反転させた第4の送信信号と、をそれぞれ駆動信号として出力して超音波探触子2に送信超音波を生成させる。信号成分抽出部135は、第1の送信信号に対応する第1の受信信号と、第2の送信信号に対応する第2の受信信号と、第3の送信信号に対応する第3の受信信号と、第4の送信信号に対応する第4の受信信号と、を合成して2次高調波成分と差音成分とをそれぞれ抽出する。【選択図】図4
