PROBLEM TO BE SOLVED: To provide an ultrasound diagnostic apparatus where image generation processing can be accelerated and power consumption can be reduced.SOLUTION: A/D conversion of reception signals are executed, by restricting an A/D conversion execution range where A/D conversion is actually executed within the A/D conversion executable range of the reception signals by a reception signal processing part according to amplitudes of the reception signals that is output from the transducer array. The A/D conversion execution range, which has a predetermined bit width regardless of measurement depths, is determined by an A/D start bit and A/D completion bit. As the measurement depths increase, the A/D start bit and A/D completion bit of the A/D conversion execution range are decremented.COPYRIGHT: (C)2013,JPO&INPIT【課題】画像生成処理の高速化と省電力化を図ることができる超音波診断装置を提供する。【解決手段】アレイトランスデューサから出力される受信信号の振幅に応じて、受信信号処理部による受信信号のA/D変換可能範囲のうち実際にA/D変換が実行されるA/D変換実行範囲を限定し、受信信号のA/D変換を行う。A/D変換実行範囲は、測定深度に関わらずに所定のビット幅を有し、A/D開始ビットおよびA/D終了ビットで特定され、測定深度が増すほど、A/D変換実行範囲のA/D開始ビットおよびA/D終了ビットが漸減される。【選択図】図5
