Results 151 to 160 of about 749,316 (193)
Biomarker detection based on nanoparticle-induced ultrasonic Rayleigh scattering. [PDF]
Microsyst NanoengZhang W +6 more
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Air-Coupled Ultrasound Systems for Biomedical Applications: Advances in Sensors, Electronic Interfaces and Signal Processing Strategies. [PDF]
Sensors (Basel)Laganà F +5 more
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An 8 Channel Transceiver ASIC to Interface a CMUT Array
2021 19th IEEE International New Circuits and Systems Conference (NEWCAS), 2021 This paper presents an 8 channel interface ASIC for a 2D Capacitive Micromachined Ultrasonic Transducer (CMUT) array. We propose a novel interfacing scheme to eliminate the need for a high voltage (HV) external DC biasing. A two-level HV driver circuit switches between two HV levels to produce a 47 V peak to peak output pulse with rise and fall times ...
Prajith Kumar Poongodan +3 more
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Volumetric Flow Measurement Using an Implantable CMUT Array
IEEE Transactions on Biomedical Circuits and Systems, 2011This paper describes volumetric-flow velocity measurement using an implantable capacitive micromachined ultrasonic transducer (CMUT) array. The array is comprised of multiple-concentric CMUT rings for ultrasound transmission and an outmost annular CMUT array for ultrasound reception.
Jingkuang Chen
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Multi-row linear cMUT array using cMUTs and multiplexing electronics
2009 IEEE International Ultrasonics Symposium, 2009A large area reconfigurable imaging array for research purposes is being developed with co-integrated cMUTs and control electronics. The goal is a 2.5cm 2D tileable module with ≫16,000 transducer sub-elements spaced at a pitch of 185um in X and Y dimensions.
Robert Wodnicki +9 more
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Backing requirements for CMUT arrays on silicon
IEEE Ultrasonics Symposium, 2005., 2006Capacitive Micromachined Ultrasonic Transducer (CMUT) have been subject to research by several research groups during the last two decades. Despite many potential advantages over traditional piezoelectric ultrasound transducers, the CMUT technology has not yet made a proper commercial breakthrough.
S. Berg, A. Ronnekleiv
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Resonances and nonuniformities in CMUT elements or arrays
2014 IEEE International Ultrasonics Symposium, 2014We determine the response of individual cells of a CMUT array immersed in water using the small-signal equivalent circuit of a single cell and radiation impedances. Using a numerically efficient technique, we are able to simulate large arrays. The results indicate the presence of resonances at low frequencies where Rayleigh-Bloch waves are excited on ...
Atalar, Abdullah, Köymen, Hayrettin
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Optimization of the efficiency and reliability of reverse-fabricated CMUT arrays
2017 IEEE International Ultrasonics Symposium (IUS), 2017The electro-mechanical conversion efficiency and the long-term reliability of Capacitive Micromachined Ultrasonic Transducers (CMUT) are mainly limited by the parasitic capacitance and by charge injection phenomena. In this paper, we investigated the possibility of reducing both the parasitic capacitance, by patterning the CMUT electrodes in order to ...
Savoia Alessandro Stuart +8 more
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Dual-Frequency CMUT Arrays for Multiband Ultrasound Imaging Applications
IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, 2021Dual-frequency capacitive micromachined ultrasonic transducers (CMUTs) are introduced for multiscale imaging applications, where a single array transducer can be used for both deep low-resolution imaging and shallow high-resolution imaging. These transducers consist of low- and high-frequency membranes interlaced within each subarray element.
Mohammad Maadi +2 more
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