PROBLEM TO BE SOLVED: To provide an ultrasonic diagnosis apparatus capable of reducing an unnecessary signal component included in a reception signal, and performing unnecessary signal component reduction processing which is faithful to the disturbance degree of phases, especially, in an element arranging direction or an element reception signal line direction.SOLUTION: A factor computing unit 30 extracts a plurality of code bits from a plurality of element reception signals having been subjected to delay processing, and obtains the number (frequency) of polarity reversal in a signal line direction. Specifically, it is determined whether or not the contents of code bits are coincident between adjacent signals. A factor is computed based on the number of polarity reversal. A multiplier 32 multiplies the factor by the reception signal having been subjected to wave detection. When phases are disturbed in the signal line direction, the number of the polarity reversal is increased and the factor is reduced, thereby a signal reduction effect is increased.COPYRIGHT: (C)2012,JPO&INPIT【課題】超音波診断装置において、受信信号に含まれる不要信号成分が抑圧されるようにする。特に素子配列方向又は素子受信信号列方向における位相の乱れ度合いに忠実な不要信号成分抑圧処理が実行されるようにする。【解決手段】係数演算部30は、遅延処理後の複数の素子受信信号の中から複数の符号ビットを取り出して、信号列方向に沿って極性反転の個数(頻度)を求める。具体的には隣接する信号間において符号ビットの内容が一致するか否かを判定する。極性反転の個数に基づいて係数が演算される。乗算器32はその係数を検波後の受信信号に乗算する。信号列方向に沿って位相が乱れている場合には極性反転の個数が増大して係数が小さくなり、信号抑制効果が大きくなる。【選択図】図1
