Results 31 to 40 of about 1,412,725 (216)

Forward-viewing CMUT arrays for medical imaging

IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, 2004
This paper reports the design and testing of forward-viewing annular arrays fabricated using capacitive micromachined ultrasonic transducer (CMUT) technology. Recent research studies have shown that CMUTs have broad frequency bandwidth and high-transduction efficiency.
Demirci, Utkan, Ergün, Arif Sanlı, Oralkan, Ömer, Karaman, Mustafa, Khuri-Yakub, Butrus Thomas   +4 more
openaire   +3 more sources

Acoustical tuning of CMUT receiver arrays [PDF]

2016 IEEE International Ultrasonics Symposium (IUS), 2016
Cell placement in an element and structural modifications on the array baffle significantly change the bandwidth, band shape and signal to noise ratio of a CMUT receiver array. In this paper, optimum receiver performance tailoring by means of cell placement, cell size variation and use of dummy cells in the array elements is discussed.
Taşdelen, Akif Sinan, Atalar, Abdullah, Enhoş, Kerem, Köymen, Hayrettin   +3 more
openaire   +3 more sources

Underwater Imaging Using a 1 × 16 CMUT Linear Array [PDF]

Sensors, 2016
A 1 × 16 capacitive micro-machined ultrasonic transducer linear array was designed, fabricated, and tested for underwater imaging in the low frequency range. The linear array was fabricated using Si-SOI bonding techniques.
Rui Zhang, Wendong Zhang, Changde He, Yongmei Zhang, Jinlong Song, Chenyang Xue   +5 more
doaj   +3 more sources

Advances in MEMS, Optical MEMS, and Nanophotonics Technologies for Volatile Organic Compound Detection and Applications. [PDF]

Small Sci
Volatile organic compounds (VOCs) are ubiquitous in natural and human environments, posing environmental and health risks. Recent advancements in micro‐electromechanical system and optical sensing offer new possibilities for VOC detection. This article reviews their progress, focusing on mechanisms, artificial intelligence enhancement, and applications
Li D, Zhou H, Ren Z, Lee C.
europepmc   +2 more sources

Design and Fabrication of Multi-Frequency and Low-Quality-Factor Capacitive Micromachined Ultrasonic Transducers [PDF]

Micromachines
Capacitive micromachined ultrasonic transducers (CMUTs) have been developed for air-coupled applications to address key challenges such as noise, prolonged ringing, and side-lobe interference. This study introduces an optimized CMUT design that leverages
Amirhossein Moshrefi, Abid Ali, Mathieu Gratuze, Frederic Nabki   +3 more
doaj   +2 more sources

Investigation of New Accelerometer Based on Capacitive Micromachined Ultrasonic Transducer (CMUT) with Ring-Perforation Membrane [PDF]

Micromachines
Capacitive micromachined ultrasonic transducer (CMUT) has been widely studied due to its excellent resonance characteristics and array integration. This paper presents the first study of the CMUT electrostatic stiffness resonant accelerometer. To improve
Luhao Gou, Hongliang Wang, Qi Ding, Yulong Liu, Runze Yang, Feng Zhang, Pengcheng Zhang, Gang Cao   +7 more
doaj   +2 more sources

Multiphysical model of CMUT array based on modal decomposition and the Rayleigh integral

Sensing and Bio-Sensing Research
There is a high number of modeling techniques for calculation of characteristics of capacitive micromachined ultrasound transducers. Very few of them are capable of calculation of the acoustic field, especially when the number of cells in the array is ...
A.E. Biriukov, A.M. Korsunsky
doaj   +2 more sources

Custom integrated circuit design for ultrasonic therapeutic CMUT array

Microsystem Technologies, 2014
This paper presents the design of a highly flexible and programmable transmit beam-former ASIC using a high voltage (HV) 0.35 μm CMOS technology to be flip-chip bonded to a 4 × 4 CMUT array for ultrasound therapeutic applications. However, proposed IC can be used as a transmitter circuitry in color Doppler 3D imaging applications. In our proposed chip,
Maadi, Mohammad, Bayram, Baris
openaire   +4 more sources

Characterization of a CMUT Array

, 2012
Ultrasound transducers are used in a broad range of applications covering from underwater communications to medical imaging and treatment. The ultrasonic transducer determines the key specifications such as resolution, sensitivity and signal to noise ratio.
Zure, Tugrul
openaire   +4 more sources

Design, Fabrication, and Characterization of Capacitive Micromachined Ultrasonic Transducers for Transcranial, Multifocus Neurostimulation [PDF]

Micromachines
In a recent study using 3-D fullwave simulations, it was shown for a nonhuman primate model that a helmet-shaped 3D array of 128 transducer elements can be assembled for neurostimulation in an optimized configuration with the accommodation of an imaging ...
Tamzid Ibn Minhaj, Muhammetgeldi Annayev, Oluwafemi J. Adelegan, Ali Önder Biliroğlu, Feysel Yalçın Yamaner, Ömer Oralkan   +5 more
doaj   +2 more sources