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Ultrasound contrast agents (UCA) are widely used for the diagnosis of cardiovascular diseases. They typically consist of shell encapsulated microbubbles which, when injected in blood, increase the blood/tissue ratio in ultrasound medical images. Characterizing the behavior of microbubbles hit by US energy, it is important to optimize their performance in clinical applications. In this paper, the movement...
In flow measurements in which microbubbles are involved, the amplitude and phase of the received echo signal are noticeably influenced by the transmitted ultrasound intensity. Previous studies have shown that, when such intensity is progressively increased, the Doppler spectrum is accordingly distorted, i.e., it is asymmetrically broadened toward the negative frequency side. Such deformation has been...
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