Results 11 to 20 of about 132,248 (302)
An Improved Equivalent Circuit Simulation of High Frequency Ultrasound Transducer
Frontiers in Materials, 2021 The equivalent circuit simulation plays an important role in the design of ultrasound transducer. However, the existing methods are difficult to achieve the effect of matching and backing layer, and not able to accurately simulate the transducer with ...
Zhitian Shen +7 more
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Glass-windowed ultrasound transducers [PDF]
Ultrasonics, 2016 In research and industrial processes, it is increasingly common practice to combine multiple measurement modalities. Nevertheless, experimental tools that allow the co-linear combination of optical and ultrasonic transmission have rarely been reported.
Tostein, Yddal +4 more
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Transcranial focused ultrasound stimulation with high spatial resolution
Brain Stimulation, 2021 Background: Low-intensity transcranial focused ultrasound stimulation is a promising candidate for noninvasive brain stimulation and accurate targeting of brain circuits because of its focusing capability and long penetration depth.
Seongyeon Kim +11 more
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Capacitive micromachined ultrasound transducers for intravascular ultrasound imaging [PDF]
Microsystems & Nanoengineering, 2020 AbstractIntravascular ultrasound (IVUS) is a burgeoning imaging technology that provides vital information for the diagnosis of coronary arterial diseases. A significant constituent that enables the IVUS system to attain high-resolution images is the ultrasound transducer, which acts as both a transmitter that sends acoustic waves and a detector that ...
Jiaqi Wang +3 more
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Method and apparatus for analyzing material properties using ultrasound [PDF]
, 1993 Apparatus is disclosed for investigating the mechanical properties of a solid material such as bone, including means for positioning the apparatus in proximity to a surface of the material, at least one emitting ultrasound transducer, at least one ...
Antich, Peter P. +2 more
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Harmonic chirp imaging method for ultrasound contrast agent [PDF]
, 2005 Coded excitation is currently used in medical ultrasound to increase signal-to-noise ratio (SNR) and penetration depth. We propose a chirp excitation method\ud for contrast agents using the second harmonic component of the response.
Associate Member +5 more
core +9 more sources
A Wideband High-Voltage Power Amplifier Post-Linearizer for Medical Ultrasound Transducers
Applied Sciences, 2017 The medical ultrasound transducer is a principal component in ultrasound systems, as it significantly influences system performance. The high-voltage power amplifier (HVPA) is the key ultrasound transmitter component and interfaces with the medical ...
Hojong Choi +2 more
doaj +1 more source
Magnetic phase transitions in Gd64Sc36 studied using non-contact ultrasonics [PDF]
, 2012 The speed and attenuation of ultrasound propagation can be used to determine material properties and identify phase transitions. Standard ultrasonic contact techniques are not always convenient due to the necessity of using couplant; however, recently ...
Andrianov A B +17 more
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Coherent Multi-Transducer Ultrasound Imaging [PDF]
IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, 2019 An extended aperture has the potential to greatly improve ultrasound imaging performance. This work extends the effective aperture size by coherently compounding the received radio frequency data from multiple transducers. A framework is developed in which an ultrasound imaging system consisting of $N$ synchronized matrix arrays, each with partly ...
Laura Peralta +5 more
openaire +5 more sources
An ultrasonic approach for contact stress mapping in machine joints and concentrated contacts [PDF]
, 2004 The measurement of pressure at a contact in a machine part is important because contact stresses frequently lead to failure by seizure, wear or fatigue.
Drinkwater, B.W. +3 more
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