PROBLEM TO BE SOLVED: To obtain an ultrasonic reflection image inside an object to be measured as a highly accurate 3D image. SOLUTION: An ultrasonic probe having three or more vibrating elements is brought into contact with a measurement object, and ultrasonic waves are sequentially irradiated to the inside of the measurement object from each vibrating element, and a reflected wave from the measurement object is applied. Is received by two or more vibrating elements as each received data set for each irradiated vibrating element, and a three-dimensional reflection image inside the measurement object is applied by applying the aperture synthesis method based on the obtained received data set. Each received dataset is a method and apparatus for obtaining a three-dimensional reflection image, including position data, ultrasonic arrival time, and received ultrasonic intensity data. [Selection diagram] Fig. 1【課題】測定対象物の内部の超音波反射像を高精度な３Ｄ像として得ること。【解決手段】３つ以上の振動素子を有する超音波プローブを測定対象物に当接させ、各振動素子から順々に超音波を測定対象物の内部に照射し、測定対象物からの反射波を、照射した振動素子ごとに各受信データセットとして２個以上の振動素子で受信させ、得られた受信データセットに基づいて開口合成法を適用することにより測定対象物の内部の３次元反射像を生成する、ことを含み、各受信データセットは、位置データ、超音波の到達時間、受信した超音波の強度のデータを含む、３次元反射像を取得する方法及び装置。【選択図】図１
