PROBLEM TO BE SOLVED: To provide a doppler ultrasonic diagnostic system estimating waveforms corresponding to a desired cardiac time phase and not receiving the waveforms of valve signals and adjusting automatic speed ranges from the estimated waveforms.SOLUTION: The device has a memory means 7 previously storing the modeled values in the models of general ideal blood flow waveforms, an actually waveform calculating means 91 for obtaining actually measured blood flow speed waveforms by tracing spectrum images, an ECG waveform acquiring means 92 for acquiring ECG waveforms, a waveform estimating means 93 for estimating ideal blood flow rate waveforms of a patient from the actually measured blood flow rate waveforms, the ECG waveforms, and the modeled values, and a speed range calculating out means 94 for obtaining the speed ranges from the actually measured blood flow rate waveforms constituted by comparing the actually measured blood flow waveforms and the estimated blood flow rate waveforms and excluding the part where the resultant difference exceeds the threshold value.COPYRIGHT: (C)2009,JPO&INPIT【課題】所望の心時相に相当する波形でかつ弁信号の波形を受けない波形を推定し、その推定した波形を基に、自動的な速度レンジの調整を行うドプラ超音波診断装置を提供する。【解決手段】一般的な理想の血流速度波形のモデルにモデル化した値を予め記憶しておく記憶手段7と、スペクトラム画像をトレースし実測の血流速度波形を求める実測波形算出手段91と、ECG波形を取得するECG波形取得手段92と、実測の血流速度波形、ECG波形、及びモデル化した値を基に患者の理想の血流速度波形を推定する波形推定手段93と、実測の血流速度波形と推定される血流速度波形とを比較し、その差が閾値を超えた部分を除いた実測の血流速度波形を基に速度レンジを求める速度レンジ算出手段94とを備える。【選択図】図1
