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Micromachined 1–3 composite dual frequency IVUS array for contrast enhanced intravascular ultrasound imaging

Recent studies suggest that microbubbles based contrast enhanced intravascular ultrasound (CE-IVUS) for vasa vasorum assessment is promising in the identification of vulnerable plaques. However, conventional ultrasound is not suitable for imaging modality which demands up to 5th order harmonics for a receiver. To ensure the imaging performance, high-frequency broadband micromachined 1–3 composites is considered for receivers for their superior electromechanical coupling coefficient and relatively low acoustic impedance. Also, IVUS arrays are desirable for their capability of beam steering, sub-aperture firing, and higher frame rates. In our study, a dual-frequency IVUS array with micromachined 1–3 composites was developed as receiver for superharmonic imaging.