Fundamental Study on High-Frequency Ultrasound Probes Fabricated by Aerosol Deposition Method and Hydrothermal Method

2008 ◽  
Vol 388 ◽  
pp. 159-162
Author(s):  
Akito Endo ◽  
Jun Akedo ◽  
Shinichi Takeuchi
Keyword(s):  
Hydrothermal Method ◽  
High Frequency ◽  
Aerosol Deposition ◽  
High Frequency Ultrasound ◽  
Fundamental Study ◽  
A Value ◽  
Resonance Frequencies ◽  
Aerosol Deposition Method ◽  
Ultrasound Probes ◽  
Frequency Ultrasound

The ultrasound probes utilized in this study were fabricated using lead zirconium titanate (PZT), which was deposited using two different methods—the aerosol deposition (AD) method and the hydrothermal method. The fabricated ultrasound probes had the same structure wherein an electrode and an acoustic backing block were attached to each transducer. In this study, we have compared the acoustic characteristics of a high-frequency ultrasound probe fabricated by the AD method with those of a probe fabricated using the hydrothermal method; further, we have studied and hence determined the optimal process that can be used in the fabrication of high-frequency ultrasound probes with a resonance frequency of 40 MHz. As a result, when the pickup voltage was compared, the ultrasound probes fabricated by the AD method exhibited a value 9.5 times higher than that of the probes fabricated by the hydrothermal method. Moreover, the ultrasound probes fabricated by the AD method were found to transmit pulses at resonance frequencies of 28 MHz, 45–50 MHz, and 82–88 MHz.

High-Frequency Ultrasound Probes

2009 ◽  
pp. 63-69 ◽  
Author(s):  
Nidhi Singh ◽  
Alberto Herreros-Tejada ◽  
Irving Waxman
Keyword(s):  
High Frequency ◽  
High Frequency Ultrasound ◽  
Ultrasound Probes ◽  
Frequency Ultrasound

High-Resolution Ultrasound of Small Clinically Relevant Nerves Running Across the Posterior Triangle of the Neck

2020 ◽  
Vol 24 (02) ◽  
pp. 101-112
Author(s):  
Riccardo Picasso ◽  
Federico Zaottini ◽  
Federico Pistoia ◽  
Maribel Miguel Perez ◽  
Andrea Klauser ◽  
...  
Keyword(s):  
Clinical Practice ◽  
High Frequency ◽  
Correct Identification ◽  
High Frequency Ultrasound ◽  
Posterior Triangle ◽  
A Value ◽  
Therapeutic Procedures ◽  
Neck Anatomy ◽  
Pathologic Processes ◽  
Frequency Ultrasound

AbstractWith the advent of high-frequency ultrasound (US) transducers, new perspectives have been opened in evaluating millimetric and submillimetric nerves that, despite their dimensions, can be considered relevant in clinical practice. In the posterior triangle of the neck, the suprascapular, long thoracic, phrenic, supraclavicular, great auricular, lesser occipital, and transverse cervical nerves are amenable to US examination and the object of special interest because they may be involved in many pathologic processes or have a value as targets of advanced therapeutic procedures. The correct identification of these nerves requires a deep knowledge of local neck anatomy and the use of a complex landmarks-based approach with US. This article describes the anatomy and US technique to examine small but clinically relevant nerves of the posterior triangle of the neck (excluding the brachial plexus), reviewing the main pathologic conditions in which they may be involved.

6962 High frequency ultrasound probes for curative endoscopic mucosal resection for colorectal submucosal cancers.

2000 ◽  
Vol 51 (4) ◽  
pp. AB231
Author(s):  
Yusuke Saitoh ◽  
Mikihiro Fujiya ◽  
Jiro Watari ◽  
Kaori Fujiya ◽  
Atsuo Maemoto ◽  
...  
Keyword(s):  
Endoscopic Mucosal Resection ◽  
High Frequency ◽  
High Frequency Ultrasound ◽  
Mucosal Resection ◽  
Ultrasound Probes ◽  
Frequency Ultrasound

High-frequency ultrasound probes

2016 ◽  
pp. 88-94
Author(s):  
Nidhi Singh ◽  
Alberto Herreros-Tejada ◽  
Irving Waxman
Keyword(s):  
High Frequency ◽  
High Frequency Ultrasound ◽  
Ultrasound Probes ◽  
Frequency Ultrasound

scholarly journals Modelling high frequency ultrasound scattering from cells and ultrasound contrast agents

2021 ◽  
Author(s):  
Omar Falou
Keyword(s):  
Contrast Agents ◽  
High Frequency ◽  
Ultrasound Contrast Agents ◽  
Polystyrene Microspheres ◽  
High Frequency Ultrasound ◽  
Surface Modes ◽  
Ultrasound Contrast ◽  
Resonance Frequencies ◽  
Ultrasound Scattering ◽  
Frequency Ultrasound

High frequency ultrasound has been shown to detect structural and physical changes in cell ensembles during apoptosis and hence has the potential of monitoring cancer treatment. Ultrasound contrast agents have also been shown to enhance contrast between blood and the surrounding tissue and hence may be used to distinguish between treated and untreated tumours. Theoretical models of high frequency ultrasound scattering from individual cells and ultrasound contrast agents (UCAs) are needed in order to develop methods for using high frequency ultrasound to classify tumours, quantify their responses to treatment, and eventually provide a better cancer detection and treatment monitoring techniques. This work introduces a new technique for measuring the ultrasound backscatter from individual micron-sized objects by combining a microinjection system with a co-registered optical microscope and an ultrasound imaging device. The system was calibrated by measuring the backscatter response from polystyrene microspheres and comparing it to theoretical predictions of an elastic sphere. The backscatter responses from single sea urchin oocytes and acute myloid leukemia cells were also investigated. It was found that such responses are best modelled using the fluid sphere model. A finite element model was also introduced to study scattering from microspheres and UCAs. The Helmholtz equation was used to describe the propagation of sound waves in the fluid domains whereas the constitutive equation was used to describe the stress-strain relationship in the solid domains. Studies on polystyrene microspheres and UCAs revealed the existence of a systematic relationship between the resonance frequencies and the microsphere surface modes. No such a relationship was found for the UCAs of interest. Instead, these agents exhibited a collection of complex oscillations which appear to be a combination of various surface modes. Increasing the UCA's shell thickness and its shear modulus produced a shift in the resonance frequencies to higher values. A decrease in UCA diameter produced similar effects. The importance of these findings towards the understanding of the UCA behaviour at high frequencies and the generation of harmonics are discussed. Future work includes the measurement of the backscatter response from individual UCAs and cells at various apoptotic stages.

High-frequency ultrasound probes in the evaluation of colorectal neoplasia

2001 ◽  
Vol 13 (s1) ◽  
pp. S14-S18 ◽  
Author(s):  
Yusuke Saitoh ◽  
Jiro Watari ◽  
Mikihiro Fujiya ◽  
Yutaka Kohgo
Keyword(s):  
High Frequency ◽  
Colorectal Neoplasia ◽  
High Frequency Ultrasound ◽  
Ultrasound Probes ◽  
Frequency Ultrasound

High‐frequency ultrasound probes in the evaluation of colorectal neoplasia

2001 ◽  
Vol 13 (s1) ◽  
Author(s):  
Yusuke Saitoh ◽  
Jiro Watari ◽  
Mikihiro Fujiya ◽  
Yutaka Kohgo
Keyword(s):  
High Frequency ◽  
Colorectal Neoplasia ◽  
High Frequency Ultrasound ◽  
Ultrasound Probes ◽  
Frequency Ultrasound
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