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- W830902136 abstract "Using ultrasound contrast agents, many clinical diagnoses have now been improved thanks to new contrast dedicated imaging techniques. Contrast agents are now used routinely in cardiology and in radiology to improve the detection and visualization of blood perfusion in various organs (e.g. tumors). Since a few years, Capacitive Micromachined Ultrasonic Transducers (cMUTs) have emerged as a good alternative to traditional piezoelectric transducer. cMUTs provide several advantages such as wide frequency bandwidth which could be further developed for nonlinear imaging. In this dissertation, we propose to exploit cMUT for contrast agent imaging. Firstly, the excitation signal was adapted to suppress the inherent nonlinear behavior of cMUT. Then, new detection methods based on specific acoustic properties of microbubbles have been developed and evaluated with a cMUT probe. Results show a good suppression from tissue responses whereas echoes from microbubbles are enhanced. Furthermore, the efficiency of each method is improved by the use of cMUT revealing the potential of this new transducer technology for contrast agent detection." @default.
- W830902136 created "2016-06-24" @default.
- W830902136 creator A5019924722 @default.
- W830902136 date "2011-07-07" @default.
- W830902136 modified "2023-09-27" @default.
- W830902136 title "Imagerie de contraste ultrasonore avec transducteurs capacitifs micro-usinés" @default.
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- W830902136 hasPublicationYear "2011" @default.
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