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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...
In this paper, a dual-frequency (7 MHz/35 MHz) IVUS array for acoustic angiography was designed, fabricated and characterized. The transmit array (TX, 7 MHz) consists of eight PZT-5H 1–3 composite elements, and the receiving array (RX, 35 MHz) includes 32 elements of micromachined PMN-PT single crystal 1–3 composites. A frequency selective isolation layer was designed between transmit and receiving...
Approximately 80% of men who reach 80-years of age will have some form of prostate cancer. The challenge remains to differentiate indolent from aggressive disease. Based on recent research, acoustic angiography, a novel contrast enhanced ultrasound imaging technique, can provide high-resolution visualization of tissue microvasculature and has demonstrated the ability to differentiate vascular characteristics...
In this paper, a novel dual layer co-linear array ultrasound transducer was developed for transrectal dual-frequency superharmonic imaging. The KLM model and Field II were used for the acoustic stack design and simulation of the acoustic field of the array, respectively. The newly designed and fabricated probe consists of 50 transmit elements with a center frequency of 3 MHz and 100 receive elements...
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