A method of assisting diagnosis using images obtained from a plurality of signal transmitting / receiving units is provided. A first drive for performing a measurement using a first signal transceiver on a probe and a second drive for transmitting and receiving a probe inserted into a blood vessel using a second signal transceiver on a probe And a second drive for performing measurement. Information indicating the position of the first signal transceiver when the signal and the signal measured using the first signal transceiver on the probe are obtained during the first drive and the information indicating the position of the probe And the information indicating the position of the second signal transmitting / receiving unit when the signal measured with the second signal transmitting / receiving unit above is obtained. A first blood vessel image at a first position in a blood vessel obtained by using the first signal transmitting and receiving unit and a second blood vessel image at a second position in the blood vessel obtained by using the second signal transmitting and receiving unit And the blood vessel image at the same time on the display means.複数の信号送受信部から得られた画像を用いた診断を補助する方法を提供する。 血管内に挿入されたプローブを駆動する駆動手段に対し、プローブ上の第１の信号送受信部を用いた測定を行うための第１の駆動と、プローブ上の第２の信号送受信部を用いた測定を行うための第２の駆動とを行わせる。第１の駆動中にプローブ上の第１の信号送受信部を用いて測定された信号及び信号が得られた時の第１の信号送受信部の位置を示す情報、並びに第２の駆動中にプローブ上の第２の信号送受信部を用いて測定された信号及び信号が得られた時の第２の信号送受信部の位置を示す情報、を取得する。第１の信号送受信部を用いて得られた血管内の第１の位置における第１の血管画像と、第２の信号送受信部を用いて得られた血管内の前記第１の位置における第２の血管画像と、を同時に表示手段に表示させる。
