PROBLEM TO BE SOLVED: To provide techniques for obtaining a reconstructed image which reduces an artifact without increasing the production cost using an acoustic wave detector disposed on a flat plate.SOLUTION: An acoustic wave signal processor includes: a selection section for selecting partial or entire elements of acoustic wave signals from the acoustic wave signals based on acoustic waves detected by the acoustic wave detector having a plurality of elements and setting an acoustic wave signal group a calculation section for requiring information related to an attention point of the acoustic pressure of the acoustic waves using the acoustic wave signal group and a determination section. The selection section sets a plurality of the acoustic wave signal groups at least either of which a combination of the elements or a position of the elements is different. The determination section determines whether the information related to the attention point of the acoustic pressure calculated on the basis of at least the respective acoustic wave signal groups is the presence of a sound source, and determines that the sound source does not exist in the attention point which is not based on the presence of the sound source on the basis of at least one acoustic wave signal group.COPYRIGHT: (C)2012,JPO&INPIT【課題】平板上に配置された音響波検出器で、生産コストを増大させることなく、アーチファクトを低減した再構成画像を得るための技術を提供する。【解決手段】複数の素子を持つ音響波検出器が検出した音響波に基づく音響波信号から、一部または全部の素子の音響波信号を選択して音響波信号群を設定する選択部と、音響波信号群を用いて注目点の音響波の音圧に関連する情報を求める算出部と、判定部を有し、選択部は、素子の組み合わせ又は素子の位置の少なくとも一方が異なる複数の音響波信号群を設定し、判定部は、注目点に対して音響波信号群ごとに算出された音圧に関連する情報が音源の存在に基づくものかを判定し、少なくとも一つの音響波信号群において音源の存在に基づくものではないと判定された注目点は音源が存在しないと判定する音響波信号処理装置を用いる。【選択図】図1
