IEEE Ultrasonics Ferroelectrics and Freq Control

  • Optical Multiplexing of Metrological Time and Frequency Signals in a Single 100-GHz-Grid Optical Channel
    Posted on June 1, 2021 at 12:00 am

    In this article, the concept of co-locating all metrological time and frequency signals in a single optical channel of a standard, 100-GHz-spaced optical grid is presented and evaluated. The solution is intended for situations where only a narrow optical bandwidth is available in a fiber heavily loaded with standard data traffic. We localized the optical reference signals in the middle of the […]

  • Micromachined High Frequency 1–3 Piezocomposite Transducer Using Picosecond Laser
    Posted on June 1, 2021 at 12:00 am

    In this article, a PZT/Epoxy 1-3 piezoelectric composite based on picosecond laser etching technology is developed for the fabrication of high-frequency ultrasonic transducer. The design, fabrication, theoretical analysis, and performance of the piezocomposite and transducer are presented and discussed. According to the test results, the area of the PZT pillar is $20.5mu text{m},,times 20.5,,mu […]

  • IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
    Posted on June 1, 2021 at 12:00 am

    Presents a listing of the editorial board, board of governors, current staff, committee members, and/or society editors for this issue of the publication. […]

  • Gated Transmit and Fresnel-Based Receive Beamforming With a Phased Array for Low-Cost Ultrasound Imaging
    Posted on June 1, 2021 at 12:00 am

    Low-cost ultrasound imaging systems are desired for many applications outside of radiology and cardiology departments. By making ultrasound systems smaller and lower cost, the use of ultrasound has spread from these mainstays to other areas of the hospital such as emergency departments and critical care. To further miniaturize and reduce the cost of ultrasound systems, we have investigated novel […]

  • Table of contents
    Posted on June 1, 2021 at 12:00 am

    Presents the table of contents for this issue of the publication. […]

  • Design Method of Multiwavelength EMATs Based on Spatial Domain Harmonic Control
    Posted on June 1, 2021 at 12:00 am

    Conventional electromagnetic acoustic transducers (EMATs) are generally only used to generate and detect guided waves with a single wavelength, which increases their sensitivity at that particular wavelength but limits their application scenarios and the accuracy of defect assessment. This article proposes a design method for multiwavelength EMATs based on spatial-domain harmonic control. First, […]

  • A Review of Commercial and Emerging Atomic Frequency Standards
    Posted on June 1, 2021 at 12:00 am

    Atomic frequency standards are used to generate accurate and precise time and frequency, enabling many communications, synchronization, and navigation systems in modern life. GPS and other satellite navigation systems, voice and data telecommunications, and timestamping of financial transactions all rely on precise time and frequency enabled by atomic frequency standards. This review provides a […]

  • Corrections to &#x201C;Targeted Microbubble Mediated Sonoporation of Endothelial Cells <italic>In Vivo</italic>&#x201D;
    Posted on June 1, 2021 at 12:00 am

    In the above article [1], the authors regret that there was a mistake in calculating the mol% of the microbubble coating composition. For all experiments, the unit in mg/mL was utilized and the conversion mistake only came when converting to mol% in order to define the ratio between the coating formulation components. The correct molecular weight of PEG-40 stearate is 2046.54 g/mol [2], [3], not […]

  • Mini-COVIDNet: Efficient Lightweight Deep Neural Network for Ultrasound Based Point-of-Care Detection of COVID-19
    Posted on June 1, 2021 at 12:00 am

    Lung ultrasound (US) imaging has the potential to be an effective point-of-care test for detection of COVID-19, due to its ease of operation with minimal personal protection equipment along with easy disinfection. The current state-of-the-art deep learning models for detection of COVID-19 are heavy models that may not be easy to deploy in commonly utilized mobile platforms in point-of-care […]

  • Optimization Design of Ultrasonic Transducer With Multimatching Layer
    Posted on June 1, 2021 at 12:00 am

    An optimization design strategy is developed for ultrasonic transducer (UT) with multimatching layer to improve its performance. The piezoelectric equivalent circuit model is used to determine the optimization interval of matching layer, and the PiezoCAD software is used to simulate the performance of UT with multimatching layer. The neural network (NN) models are trained by the simulation data […]

  • Fully Automated 3-D Ultrasound Segmentation of the Placenta, Amniotic Fluid, and Fetus for Early Pregnancy Assessment
    Posted on June 1, 2021 at 12:00 am

    Volumetric placental measurement using 3-D ultrasound has proven clinical utility in predicting adverse pregnancy outcomes. However, this metric cannot currently be employed as part of a screening test due to a lack of robust and real-time segmentation tools. We present a multiclass (MC) convolutional neural network (CNN) developed to segment the placenta, amniotic fluid, and fetus. The […]

  • Optimal Extraction of Ultrasonic Scattering Features in Coarse Grained Materials
    Posted on June 1, 2021 at 12:00 am

    Ultrasonic array imaging is used in nondestructive testing for the detection and characterization of defects. The scattering behavior of any feature can be described by a matrix of scattering coefficients, called the scattering matrix. This information is used for characterization, and contrary to image-based analysis, the scattering matrix allows the characterization of defects at the […]