816 resources related to Biomedical transducers
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The conference program will consist of plenary lectures, symposia, workshops and invitedsessions of the latest significant findings and developments in all the major fields of biomedical engineering.Submitted papers will be peer reviewed. Accepted high quality papers will be presented in oral and postersessions, will appear in the Conference Proceedings and will be indexed in PubMed/MEDLINE
The International Conference on Image Processing (ICIP), sponsored by the IEEE SignalProcessing Society, is the premier forum for the presentation of technological advances andresearch results in the fields of theoretical, experimental, and applied image and videoprocessing. ICIP 2020, the 27th in the series that has been held annually since 1994, bringstogether leading engineers and scientists in image and video processing from around the world.
The Conference focuses on all aspects of instrumentation and measurement science andtechnology research development and applications. The list of program topics includes but isnot limited to: Measurement Science & Education, Measurement Systems, Measurement DataAcquisition, Measurements of Physical Quantities, and Measurement Applications.
2020 Joint Conference of the IEEE International Frequency Control Symposium and International Symposium on Applications of Ferroelectrics (IFCS-ISAF)
Ferroelectric materials and applications
The world's premiere conference in MEMS sensors, actuators and integrated micro and nano systems welcomes you to attend this four-day event showcasing major technological, scientific and commercial breakthroughs in mechanical, optical, chemical and biological devices and systems using micro and nanotechnology.The major areas of activity in the development of Transducers solicited and expected at this conference include but are not limited to: Bio, Medical, Chemical, and Micro Total Analysis Systems Fabrication and Packaging Mechanical and Physical Sensors Materials and Characterization Design, Simulation and Theory Actuators Optical MEMS RF MEMS Nanotechnology Energy and Power
The Transactions on Biomedical Circuits and Systems addresses areas at the crossroads of Circuits and Systems and Life Sciences. The main emphasis is on microelectronic issues in a wide range of applications found in life sciences, physical sciences and engineering. The primary goal of the journal is to bridge the unique scientific and technical activities of the Circuits and Systems ...
Broad coverage of concepts and methods of the physical and engineering sciences applied in biology and medicine, ranging from formalized mathematical theory through experimental science and technological development to practical clinical applications.
Telephone, telegraphy, facsimile, and point-to-point television, by electromagnetic propagation, including radio; wire; aerial, underground, coaxial, and submarine cables; waveguides, communication satellites, and lasers; in marine, aeronautical, space and fixed station services; repeaters, radio relaying, signal storage, and regeneration; telecommunication error detection and correction; multiplexing and carrier techniques; communication switching systems; data communications; and communication theory. In addition to the above, ...
Publishes original and significant contributions relating to the theory, design, performance and reliability of electron devices, including optoelectronics devices, nanoscale devices, solid-state devices, integrated electronic devices, energy sources, power devices, displays, sensors, electro-mechanical devices, quantum devices and electron tubes.
Both general and technical articles on current technologies and methods used in biomedical and clinical engineering; societal implications of medical technologies; current news items; book reviews; patent descriptions; and correspondence. Special interest departments, students, law, clinical engineering, ethics, new products, society news, historical features and government.
IEE Colloquium on Intelligent Cardiac Implants, 1993
Proceedings of the IEEE 28th Annual Northeast Bioengineering Conference (IEEE Cat. No.02CH37342), 2002
An unconventional non-resonant ultrasound transducer design is presented. The design was developed to facilitate fabrication of a single scanhead with fractional bandwidth in excess of 140% and pulse-echo sensitivity adequate for clinical applications. The results obtained from a previously developed theoretical model have been verified experimentally and indicate that a multilayer structure using a 56 micron thick PVDF polymer film ...
1973 Ultrasonics Symposium, 1973
ISAF '96. Proceedings of the Tenth IEEE International Symposium on Applications of Ferroelectrics, 1996
Ultrasonic phased or sector array transducers were built using PMN-PT based electrostrictive materials. Large field-induced piezoelectric coefficients were obtained in these relaxor-type materials at relatively low DC bias (K/sub t/=0.43-0.50 at 5 KV/cm). The electrostrictive transducers have similar sensitivity and bandwidth compared to conventional PZT transducers. By choosing the appropriate composition and process, the sensitivity variation of electrostrictive transducers can ...
IEEE Symposium on Ultrasonics, 2003, 2003
Tape casting technology has been used to produce stand-alone thick films (i.e. 65 to 200 micrometers) of piezoceramics with net final shape for high frequency ultrasonic transducer applications. Four commercially available powder compositions (Pz21, Pz27, Pz29 and Pz34 from Ferroperm piezoceramics) were used. Tape casting technology is first described. The samples are characterized using electrical impedance measurements. Bulk samples of ...
Panel Discussion - COVID-19, Deep Learning and Biomedical Imaging Panel
Biomedical Engineering at the Mayo Clinic
EMBC 2011-Symposium on BME Education-PT II
Mads Nielsen - COVID-19, Deep Learning and Biomedical Imaging Panel
Q&A with Heather Benz: IEEE Brain Podcast, Episode 4
EMBC 2011-Symposium on BME Education-PT I
Bram van Ginnekin - COVID-19, Deep Learning and Biomedical Imaging Panel
Hayit Greenspan - COVID-19, Deep Learning and Biomedical Imaging Panel
Eliot Siegel - COVID-19, Deep Learning and Biomedical Imaging Panel
Raul San Jose Estepar - COVID-19, Deep Learning and Biomedical Imaging Panel
Q&A with Dr. Elisa Konofagou: IEEE Brain Podcast, Episode 10
Dean Kamen's Artificial Arm
Life Sciences Grand Challenge Conference - Laura Niklason
Wiro Niessen - COVID-19, Deep Learning and Biomedical Imaging Panel
Surgeons Got Game
IEEE Magnetics Distinguished Lecture - Alison B. Flatau
Microfluidic diagnostics and other breakthrough technologies.
Q&A with Sri Sarma: IEEE Brain Podcast, Episode 2
EMBC '09 - Advances in Neuro-rehabilitation
An unconventional non-resonant ultrasound transducer design is presented. The design was developed to facilitate fabrication of a single scanhead with fractional bandwidth in excess of 140% and pulse-echo sensitivity adequate for clinical applications. The results obtained from a previously developed theoretical model have been verified experimentally and indicate that a multilayer structure using a 56 micron thick PVDF polymer film can operate in the frequency range from 2-15 MHz. Such bandwidth is not available using conventional, resonant transducer design. The basic design considerations are presented together with the results obtained and discussed in the light of fundamental design limitations. Current efforts aiming at improvements in the technology of the multilayer transducers and the extension of the design as applied to fabrication of super wideband transducer arrays are also discussed.
Ultrasonic phased or sector array transducers were built using PMN-PT based electrostrictive materials. Large field-induced piezoelectric coefficients were obtained in these relaxor-type materials at relatively low DC bias (K/sub t/=0.43-0.50 at 5 KV/cm). The electrostrictive transducers have similar sensitivity and bandwidth compared to conventional PZT transducers. By choosing the appropriate composition and process, the sensitivity variation of electrostrictive transducers can be minimized to within 3 dB over the operating temperature range. The clinical results demonstrate the benefit of using electrostrictive materials to obtain elevation aperture control.
Tape casting technology has been used to produce stand-alone thick films (i.e. 65 to 200 micrometers) of piezoceramics with net final shape for high frequency ultrasonic transducer applications. Four commercially available powder compositions (Pz21, Pz27, Pz29 and Pz34 from Ferroperm piezoceramics) were used. Tape casting technology is first described. The samples are characterized using electrical impedance measurements. Bulk samples of the same compositions are also characterized by a similar method. Electromechanical constants are compared and shown to deliver similar performance. Finally, high frequency transducer simulations (35 MHz) are performed with tape-cast sample values to evaluate performance for medical imaging applications.
Routine high frequency piezocomposite fabrication is now becoming possible. However, specialized characterisation techniques and reference results are absent from the literature and there is an urgent demand for characterisation to support the use of this material in transducers for biomedical diagnosis and non-destructive evaluation. In this paper, we report on a novel procedure for high frequency piezocomposite fabrication and results of intensive characterisation based on electrical impedance spectroscopy and other techniques. 1-3 composite structures have been made with circular PZT pillars with diameter and kerf down to 12 mum and 6 mum respectively, aspect ratio > 3, volume fractions around 40% and active area of around 4 mm using a process which is capable of scalable commercial production. Experimental electrical impedance measurements have proved to be closely matched to one- dimensional models and piezocomposite material performance greatly exceeds that of other materials such as PVDF and LiNbO<sub>3</sub>. Comprehensive characterization of practical performance has been carried out including both through-transmission and pulse-echo measurements, generating single point results and high resolution 1D and 2D scans to produce 2D and 3D data sets, including tungsten wires test objects to determine axial and lateral resolution and transducer sensitivity. A typical prototype focused transducer is described here, with f- number of 4 and centre frequency of 37 MHz. Performance investigation yielded a through-transmission -3 dB bandwidth of 24 MHz, pulse-echo -6 dB bandwidth of 22 MHz, and lateral and axial resolutions of 250 mum and 150 mum respectively.
A full-wave 3D time domain algorithm is presented that calculates the nonlinear acoustic wavefield of medical phased array transducers emitting an arbitrarily steered, focused and apodized beam. The algorithm can be used for computer simulation studies of the occurring second and higher harmonic wavefields in these configurations and for the optimization of the transducer design. It is based on the iterative employment of a Green's function (or impulse response) method with the nonlinearity included as a contrast source. Several comparisons with validated algorithms are made, showing a perfect agreement
This paper introduces a gastric multiparameter monitoring system, gives the method of clinical experiment and then analyzes several results. The results show that monitoring gastric pH, pressure, temperature and electrogastrography (EGG) can help us to view the results of medical and therapeutic methods.
A site-specific ultrasound hyperthermia system has been designed for the treatment of intact breast. The system incorporates both therapeutic and imaging capabilities utilizing a cylindrical array applicator which surrounds the breast with the patient in a prone position. It is dedicated to optimizing the synergistic effect between thermal therapy and radiation in the treatment of early stage breast disease in patients with an extensive intraductal component of tumor
The fabrication process of new PZT-PNN piezoelectric ceramics (Ferroperm Pz21) is first described. Thick films are obtained through a tape casting route with a thickness between 60 and 90 /spl mu/m. This material is designed essentially to be integrated in high frequency medical transducers where properties such as high permittivity and high coupling factor are required. The dielectric, elastic, piezoelectric and microstructure properties of this ceramic are characterized as a function of frequency and used to simulate the behavior of an imaging transducer operating around 30 MHz. The performance obtained shows that Pz21 ceramics are well adapted for high resolution medical imaging applications.
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