Initial pulse-echo imaging results with one-dimensional capacitive micromachined ultrasonic transducer arrays

2002 ◽  
Author(s):  
O. Oralkan ◽  
X.C. Jin ◽  
K. Kaviani ◽  
A.S. Ergun ◽  
F.L. Degertekin ◽  
...  
Keyword(s):  
Ultrasonic Transducer ◽  
Initial Pulse ◽  
One Dimensional ◽  
Imaging Results ◽  
Transducer Arrays ◽  
Capacitive Micromachined Ultrasonic Transducer ◽  
Pulse Echo

Medical imaging using capacitive micromachined ultrasonic transducer arrays

Ultrasonics ◽  
2002 ◽  
Vol 40 (1-8) ◽  
pp. 471-476 ◽  
Author(s):  
Jeremy Johnson ◽  
Ömer Oralkan ◽  
Utkan Demirci ◽  
Sanlı Ergun ◽  
Mustafa Karaman ◽  
...  
Keyword(s):  
Medical Imaging ◽  
Ultrasonic Transducer ◽  
Transducer Arrays ◽  
Capacitive Micromachined Ultrasonic Transducer

Fabrication of Capacitive Micromachined Ultrasonic Transducer Arrays With Isolation Trenches Using Anodic Wafer Bonding

2015 ◽  
Vol 15 (9) ◽  
pp. 5177-5184 ◽  
Author(s):  
Ravindra Mukhiya ◽  
Aditi ◽  
K. Prabakar ◽  
M. Raghuramaiah ◽  
J. Jayapandian ◽  
...  
Keyword(s):  
Wafer Bonding ◽  
Ultrasonic Transducer ◽  
Transducer Arrays ◽  
Capacitive Micromachined Ultrasonic Transducer

scholarly journals Integration of trench-isolated through-wafer interconnects with 2d capacitive micromachined ultrasonic transducer arrays

2007 ◽  
Vol 138 (1) ◽  
pp. 221-229 ◽  
Author(s):  
Xuefeng Zhuang ◽  
Arif S. Ergun ◽  
Yongli Huang ◽  
Ira O. Wygant ◽  
Omer Oralkan ◽  
...  
Keyword(s):  
Ultrasonic Transducer ◽  
Transducer Arrays ◽  
Capacitive Micromachined Ultrasonic Transducer

One-dimensional equivalent circuit for ultrasonic transducer arrays

2019 ◽  
Vol 156 ◽  
pp. 246-257 ◽  
Author(s):  
Abdelmajid Bybi ◽  
Ouadia Mouhat ◽  
Mohammed Garoum ◽  
Hilal Drissi ◽  
Sébastien Grondel
Keyword(s):  
Equivalent Circuit ◽  
Ultrasonic Transducer ◽  
One Dimensional ◽  
Transducer Arrays

Research on optimization sparse method for capacitive micromachined ultrasonic transducer array: heuristic algorithm

Sensor Review ◽  
2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Tian Zhang ◽  
Wendong Zhang ◽  
XingLing Shao ◽  
Yang Wu
Keyword(s):  
Large Scale ◽  
Linear Array ◽  
Ultrasonic Transducer ◽  
Side Lobe ◽  
Hardware Complexity ◽  
Content Type ◽  
Sparse Array ◽  
Imaging Results ◽  
Capacitive Micromachined Ultrasonic Transducer ◽  
Imaging Artifacts

Purpose Because of the small size and high integration of capacitive micromachined ultrasonic transducer (CMUT) component, it can be made into large-scale array, but this lead to high hardware complexity, so the purpose of this paper is to use less elements to achieve better imaging results. In this research, an optimized sparse array is studied, which can suppress the side lobe and reduce the imaging artifacts compared with the equispaced sparse array with the same number of elements. Design/methodology/approach Genetic algorithm is used to sparse the CMUT linear array, and Kaiser window apodization is added to reduce imaging artifacts, the beam pattern and peak-to-side lobe ratio are calculated, point targets imaging comparisons are performed. Furthermore, a 256-elements CMUT linear array is used to carry out the imaging experiment of embedded mass and forearm blood vessel, and the imaging results are compared quantitatively. Findings Through the imaging comparison of embedded mass and forearm blood vessel, the feasibility of optimized sparse array of CMUT is verified, and the purpose of reducing the hardware complexity is achieved. Originality/value This research provides a basis for the large-scale CMUT array to reduce the hardware complexity and the amount of calculation. At present, the CMUT array has been used in medical ultrasound imaging and has huge market potential.

Fabrication of a 40 MHz Single Element Ultrasonic Transducer Using a PMN-PT Single Crystal

2006 ◽  
Vol 321-323 ◽  
pp. 978-983 ◽  
Author(s):  
Dong Guk Paeng ◽  
Hyung Ham Kim ◽  
Sang Goo Lee ◽  
Sung Min Rhim ◽  
Min Joo Choi
Keyword(s):  
Single Crystal ◽  
High Frequency ◽  
Electromechanical Coupling ◽  
Ultrasonic Transducer ◽  
Electromechanical Coupling Coefficient ◽  
Single Element ◽  
Transducer Arrays ◽  
High Dielectric ◽  
Pulse Echo ◽  
Piezoelectric Constants

PMN-PT, a piezoelectric single crystal, has been known to be a better material for transducer arrays due to its high electromechanical coupling coefficient (k33) and high dielectric and piezoelectric constants. It may also be good even for high frequency single element transducers using relatively high kt and low attenuation and velocity dispersion. However, it’s challenging to fabricate high frequency transducers using PMN-PT since it is easily breakable and requires small area and thickness of the transducer. A KLM model was used to simulate a 40 MHz single element transducer including 2 matching layers and a conductive backing. The simulation showed that the PMN-PT transducer turned out to be better in sensitivity and bandwidth than a 40 MHz LiNbO3 transducer. A 40 MHz PMN-29%PT transducer was fabricated and the pulse echo signals were obtained and analyzed. Its sensitivity was found to be –48 dB and –6dB bandwidth was about 48 %.

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