PROBLEM TO BE SOLVED: To solve the problem that spatial resolution is reduced by narrowing at least one of bands for transmission and reception when bands for a transmission waveform and for a reception waveform from a contrast medium are divided in case of using an ultrasonic probe of a limited band.SOLUTION: Signals which are characteristic to the contrast medium and are emitted when a liquid formed into fine particles is vaporized by ultrasound are detected, and the spatial distribution is expressed in an image. A narrow band is used for transmission, and a broad band is used for received signals. The transmission signal is discriminated from the received signal as the spatial resolution of the received signal remains high.COPYRIGHT: (C)2008,JPO&INPIT【課題】 超音波探触子の帯域が有限である場合、送信波形と、造影剤からの受信波形の帯域を分けようとすると、送信もしくは受信すくなとも一方の帯域が狭くなり、空間分解能が低下する。【解決手段】 微粒子化した液体が超音波によって、気化するときに放出される、造影剤特異的な信号を検出し、その空間分布を画像化する。送波には狭い帯域を使い、受波信号では広い帯域を使い、受波信号の空間分解能が高い状態で、送波信号と受波信号を区別する。【選択図】 図1
