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Hetero Acoustic Layer Surface Acoustic Wave Resonator Composed of LiNbO3 and Quartz. IEEE Trans. Ultrason. Ferroelectr. Freq. Control. (IF 3.6) Pub Date : 2023-11-27 Yong Guo,Michio Kadota,Shuji Tanaka
In this work, a shear-horizontal (SH) mode surface acoustic wave (SAW) resonator based on LiNbO3 (LN)/ Quartz (Qz) hetero acoustic layer (HAL) structure was studied by simulation and experiment. By this HAL structure, the displacement and electric displacement are well confined in the piezoelectric layer. A lower mechanical loss of Qz than that of lossy amorphous SiO2 further enhances quality (Q) factor
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Modulation of Point Spread Function for Super-Resolution Imaging. IEEE Trans. Ultrason. Ferroelectr. Freq. Control. (IF 3.6) Pub Date : 2023-11-21 Jian-Yu Lu
High image resolution is desired in wave-related areas such as ultrasound, acoustics, optics, and electromagnetics. However the spatial resolution of an imaging system is limited by the spatial frequency of the point spread function (PSF) of the system due to diffraction. In this paper, the PSF is modulated in amplitude, phase, or both to increase the spatial frequency to reconstruct super-resolution
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Flexible Ultrasonic Transducers for Wearable Biomedical Applications: A Review on Advanced Materials, Structural Designs, and Future Prospects. IEEE Trans. Ultrason. Ferroelectr. Freq. Control. (IF 3.6) Pub Date : 2023-11-16 Xiangming Xue,Huaiyu Wu,Qianqian Cai,Mengyue Chen,Sunho Moon,Ziping Huang,Taeyang Kim,Chang Peng,Wuwei Feng,Nitin Sharma,Xiaoning Jiang
Due to the rapid developments in materials science and fabrication techniques, wearable devices have recently received increased attention for biomedical applications, particularly in medical ultrasound imaging, sensing, and therapy. Ultrasound is ubiquitous in biomedical applications because of its non-invasive nature, nonionic radiating, high precision, and real-time capabilities. While conventional
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Effects of Acute and Endurance Exercise on Cerebrovascular Function and Oxygen Metabolism: A Photoacoustic Microscopy Study. IEEE Trans. Ultrason. Ferroelectr. Freq. Control. (IF 3.6) Pub Date : 2023-11-15 Yiming Wang,Naidi Sun,Indigo Milne,Rui Cao,Quan Liu,Zhengying Li,Yuntian Guan,Zhen Yan,Song Hu
Regular exercise improves the cerebrovascular function and has shown considerable therapeutic effects on a wide variety of brain diseases. However, the influence of exercise on different aspects of the cerebrovascular function remains to be comprehensively examined. In this study, we combined awake-brain photoacoustic microscopy (PAM) and a motorized treadmill to assess the effects of both acute exercise
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Spatial coherence approaches to distinguish suspicious mass contents in fundamental and harmonic breast ultrasound images. IEEE Trans. Ultrason. Ferroelectr. Freq. Control. (IF 3.6) Pub Date : 2023-11-13 Arunima Sharma,Eniola Oluyemi,Kelly Myers,Emily Ambinder,Muyinatu A Lediju Bell
When compared to fundamental B-mode imaging, coherence-based beamforming and harmonic imaging are independently known to reduce acoustic clutter, distinguish solid from fluid content in indeterminate breast masses, and thereby reduce unnecessary biopsies during breast cancer diagnosis. However, a systematic investigation of independent and combined coherence beamforming and harmonic imaging approaches
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Transparent Dual-Frequency CMUT Arrays For Photoacoustic Imaging. IEEE Trans. Ultrason. Ferroelectr. Freq. Control. (IF 3.6) Pub Date : 2023-11-08 Mahyar Ghavami,Mohammad Rahim Sobhani,Roger Zemp
The opaque ultrasound transducers used in conventional photoacoustic imaging systems necessitate oblique light delivery, which gives rise to some disadvantages such as inefficient target illumination and bulky system size. This work proposes a transparent capacitive micromachined ultrasound transducer (CMUT) linear array with dual-band operation for through-illumination photoacoustic imaging. Fabricated
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Swept-3D Ultrasound Imaging of the Mouse Brain Using a Continuously Moving 1D-Array Part II: Functional Imaging. IEEE Trans. Ultrason. Ferroelectr. Freq. Control. (IF 3.6) Pub Date : 2023-11-08 Bastian S Generowicz,Stephanie Dijkhuizen,Laurens W J Bosman,Chris I De Zeeuw,Sebastiaan K E Koekkoek,Pieter Kruizinga
Functional ultrasound (fUS) using a 1D-array transducer normally is insufficient to capture volumetric functional activity due to being restricted to imaging a single brain slice at a time. Typically, for volumetric fUS, functional recordings are repeated many times as the transducer is moved to a new location after each recording, resulting in a non-unique average mapping of the brain response and
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Transformer-based Automated Segmentation of the Median Nerve in Ultrasound Videos of Wrist-to-Elbow Region. IEEE Trans. Ultrason. Ferroelectr. Freq. Control. (IF 3.6) Pub Date : 2023-11-06 Karan R Gujarati,Lokesh Bathala,Vaddadi Venkatesh,Raji Susan Mathew,Phaneendra K Yalavarthy
Segmenting the median nerve is essential for identifying nerve entrapment syndromes, guiding surgical planning and interventions, and furthering understanding of nerve anatomy. This study aims to develop an automated tool that can assist clinicians in localizing and segmenting the median nerve from the wrist, mid-forearm, and elbow in ultrasound videos. This is the first fully automated single deep-learning
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Harnessing Acoustic Dispersions in YX-LN/SiO2/Si SH-SAW Resonators for Electromechanical Coupling Optimization and Rayleigh Mode Suppression. IEEE Trans. Ultrason. Ferroelectr. Freq. Control. (IF 3.6) Pub Date : 2023-11-02 Tzu-Hsuan Hsu,Zhi-Qiang Lee,Chia-Hsien Tsai,Cheng-Chien Lin,Ya-Ching Yu,Ming-Huang Li
In this study, we investigate the dispersive behavior of the electromechanical coupling coefficient (keff 2) for shear-horizontal (SH) and Rayleigh surface acoustic wave (SAW) modes in a YX-LiNbO3 (LN)/SiO2/Si substrate across various wavelengths. Due to the difference in velocity dispersion between the SH and Rayleigh modes, mode coupling can be observed when these two modes operate at closely proximate
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Optimization of the tracking beam sequence in Harmonic Motion Imaging. IEEE Trans. Ultrason. Ferroelectr. Freq. Control. (IF 3.6) Pub Date : 2023-11-02 Yangpei Liu,Niloufar Saharkhiz,Md Murad Hossain,Elisa E Konofagou
Harmonic Motion Imaging (HMI) is an ultrasound elastography technique that estimates the viscoelastic properties of tissues by inducing localized oscillatory motion using focused ultrasound. The resulting displacement, assumed to be inversely proportional to the tissue local stiffness, is estimated using an imaging array based on RF speckle tracking. In conventional HMI, this is accomplished with plane
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A Miniature Ultrasound Source for Neural Modulation. IEEE Trans. Ultrason. Ferroelectr. Freq. Control. (IF 3.6) Pub Date : 2023-11-01 Samantha F Schafer,Haley Croke,Andres Kriete,Hasan Ayaz,Peter A Lewin,Catherine R von Reyn,Mark E Schafer
This work describes a unique ultrasound (US) exposure system designed to create very localized ( [Formula: see text]) sound fields at operating frequencies that are currently being used for preclinical US neuromodulation. This system can expose small clusters of neuronal tissue, such as cell cultures or intact brain structures in target animal models, opening up opportunities to examine possible mechanisms
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Ultrasound Concave 2-D Ring Array for Retinal Stimulation. IEEE Trans. Ultrason. Ferroelectr. Freq. Control. (IF 3.6) Pub Date : 2023-11-01 Jian-Yu Lu,Gengxi Lu,Biju B Thomas,Mark S Humayun,Qifa Zhou
An ultrasound concave 2-D ring array transducer was designed for applications in visual stimulation of the retina with a long-term goal to restore vision in individuals with intact neurons but suffering blindness due to retinopathies. The array was synthesized and has a frequency of 20 MHz (0.075-mm wavelengths in water), 18-mm focal length (the curvature of the concave array), 1004 elements (with
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Shear Wave Ultrasound Inspection of Flaws in Silicon Wafers Using Focused Transducers. IEEE Trans. Ultrason. Ferroelectr. Freq. Control. (IF 3.6) Pub Date : 2023-11-01 Lauren Katch,Wei Yi Yeoh,Odissei Touzanov,Mario Pacheco,Bo Lan,Andrea P Arguelles
Silicon parts can contain micrometer-sized vertical cracks that are challenging to detect. Inspection using high-frequency focused ultrasound has shown promise for detecting defects of this size and geometry. However, implementing focused ultrasound to inspect anisotropic media can prove challenging, given the directional dependence of wave propagation and subsequent focusing behavior. In this work
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Micromachining of High-Quality PMN-PT/Epoxy 1-3 Composite for High-Frequency (>30 MHz) Ultrasonic Transducer Applications. IEEE Trans. Ultrason. Ferroelectr. Freq. Control. (IF 3.6) Pub Date : 2023-11-01 Zhihong Lei,Guisheng Xu,Jinfeng Liu,Youjian Liu,Xuanrong Ji
Fabricating PMN-PT composites, the core component of high-frequency (> 30 MHz) transducers, remains challenging due to their poor machinability and ultrasmall kerfs. This urgent problem is significantly impeding the development of PMN-PT ultrasonic transducers for use in clinical research, biomedical sciences, and nondestructive testing (NDT). In this study, high-quality PMN-0.3PT/epoxy 1-3 composites
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Longitudinal 3-D Visualization of Microvascular Disruption and Perfusion Changes in Mice During the Evolution of Glioblastoma Using Super-Resolution Ultrasound. IEEE Trans. Ultrason. Ferroelectr. Freq. Control. (IF 3.6) Pub Date : 2023-11-01 Jacob R McCall,Ryan DeRuiter,Mark Ross,Francisco Santibanez,Shawn D Hingtgen,Gianmarco F Pinton,Paul A Dayton
Glioblastoma is an aggressive brain cancer with a very poor prognosis in which less than 6% of patients survive more than five-year post-diagnosis. The outcome of this disease for many patients may be improved by early detection. This could provide clinicians with the information needed to take early action for treatment. In this work, we present the utilization of a non-invasive, fully volumetric
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Enhanced Needle Visualization With Reflection Tuned Apodization Based on the Radon Transform for Ultrasound Imaging. IEEE Trans. Ultrason. Ferroelectr. Freq. Control. (IF 3.6) Pub Date : 2023-11-01 Gayathri Malamal,Hans-Martin Schwab,Mahesh Raveendranatha Panicker
In ultrasound (US)-guided interventions, accurately tracking and visualizing needles during in-plane insertions are significant challenges due to strong directional specular reflections. These reflections violate the geometrical delay and apodization estimations in the conventional delay and sum beamforming (DASB) degrading the visualization of needles. This study proposes a novel reflection tuned
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Higher Order Singular Value Decomposition Filter for Contrast Echocardiography. IEEE Trans. Ultrason. Ferroelectr. Freq. Control. (IF 3.6) Pub Date : 2023-11-01 Geraldi Wahyulaksana,Luxi Wei,Jason Voorneveld,Maaike Te Lintel Hekkert,Mihai Strachinaru,Dirk J Duncker,Nico De Jong,Antonius F W van der Steen,Hendrik J Vos
Assessing the coronary circulation with contrast-enhanced echocardiography has high clinical relevance. However, it is not being routinely performed in clinical practice because the current clinical tools generally cannot provide adequate image quality. The contrast agent's visibility in the myocardium is generally poor, impaired by motion and nonlinear propagation artifacts. The established multipulse
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Superharmonic and Microultrasound Imaging With Plane Wave Beamforming Techniques. IEEE Trans. Ultrason. Ferroelectr. Freq. Control. (IF 3.6) Pub Date : 2023-11-01 Jing Yang,Emmanuel Cherin,Jianhua Yin,Paul A Dayton,F Stuart Foster,Christine E M Demore
Superharmonic contrast imaging (SpHI) suppresses tissue clutter and allows high-contrast visualization of the vasculature. An array-based dual-frequency (DF) probe has been developed for SpHI, integrating a 21-MHz, 256-element microultrasound imaging array with a 2-MHz, 32-element array to take advantage of the broadband nonlinear responses from microbubble (MB) contrast agents. In this work, ultrafast
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Nonlinear Acoustic Holography With Adaptive Sampling. IEEE Trans. Ultrason. Ferroelectr. Freq. Control. (IF 3.6) Pub Date : 2023-11-01 Ahmed Sallam,Shima Shahab
Accurate and efficient numerical simulation of highly nonlinear ultrasound propagation is essential for a wide range of therapeutic and physical ultrasound applications. However, due to large domain sizes and the generation of higher harmonics, such simulations are computationally challenging, particularly in 3-D problems with shock waves. Current numerical methods are based on computationally inefficient
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Visualization of Human Hand Tendon Mechanical Anisotropy in 3-D Using High- Frequency Dual-Direction Shear Wave Imaging. IEEE Trans. Ultrason. Ferroelectr. Freq. Control. (IF 3.6) Pub Date : 2023-11-01 Guo-Xuan Xu,Pei-Yu Chen,Chih-Chung Huang
High-resolution ultrasound shear wave elastography has been used to determine the mechanical properties of hand tendons. However, because of fiber orientation, tendons have anisotropic properties; this results in differences in shear wave velocity (SWV) between ultrasound scanning cross sections. Rotating transducers can be used to achieve full-angle scanning. However, this technique is inconvenient
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COMFormer: Classification of Maternal-Fetal and Brain Anatomy Using a Residual Cross-Covariance Attention Guided Transformer in Ultrasound. IEEE Trans. Ultrason. Ferroelectr. Freq. Control. (IF 3.6) Pub Date : 2023-11-01 Md Mostafa Kamal Sarker,Vivek Kumar Singh,Mohammad Alsharid,Netzahualcoyotl Hernandez-Cruz,Aris T Papageorghiou,J Alison Noble
Monitoring the healthy development of a fetus requires accurate and timely identification of different maternal-fetal structures as they grow. To facilitate this objective in an automated fashion, we propose a deep-learning-based image classification architecture called the COMFormer to classify maternal-fetal and brain anatomical structures present in 2-D fetal ultrasound (US) images. The proposed
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Directional Multifrequency Guided Waves Communications Using Discrete Frequency-Steerable Acoustic Transducers. IEEE Trans. Ultrason. Ferroelectr. Freq. Control. (IF 3.6) Pub Date : 2023-11-01 Masoud Mohammadgholiha,Federica Zonzini,Jochen Moll,Luca De Marchi
A novel directional transducer based on guided waves (GWs) is introduced in this article, designed for use in structural health monitoring (SHM) and acoustic data communication applications, i.e., systems in which the elastic medium serves as a transmission channel and information is conveyed through the medium via elastic waves. Such systems can overcome difficulties associated with traditional communication
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Nanoparticle-Epoxy Composite Molding for Undeformed Acoustic Holograms With Tailored Acoustic Properties. IEEE Trans. Ultrason. Ferroelectr. Freq. Control. (IF 3.6) Pub Date : 2023-11-01 Jinwook Kim,Sandeep Kasoji,Phillip G Durham,Paul A Dayton
Acoustic hologram (AH) lenses are typically produced by high-resolution 3-D printing methods, such as stereolithography (SLA) printing. However, SLA printing of thin, plate-shaped lens structures has major limitations, including vulnerability to deformation during photocuring and limited control of acoustic impedance. To overcome these limitations, we demonstrated a nanoparticle-epoxy composite (NPEC)
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Near Spurious-Free Thickness Shear Mode Lithium Niobate Resonator for Piezoelectric Power Conversion. IEEE Trans. Ultrason. Ferroelectr. Freq. Control. (IF 3.6) Pub Date : 2023-11-01 Kristi Nguyen,Vakhtang Chulukhadze,Eric Stolt,Weston Braun,Jeronimo Segovia-Fernandez,Sombuddha Chakraborty,Juan Rivas,Ruochen Lu
Piezoelectric power converters, where acoustic resonators replace the inductors as energy storage elements, promise much higher power density and higher efficiency compared to conventional circuits. Recently, lithium niobate (LiNbO3) piezoelectric resonators have been integrated within power converter circuits, showing good conversion efficiency, thanks to their high quality factor ( Q ) and electromechanical
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A GPU-Based, Real-Time Dealiasing Framework for High-Frame-Rate Vector Doppler Imaging. IEEE Trans. Ultrason. Ferroelectr. Freq. Control. (IF 3.6) Pub Date : 2023-11-01 Hassan Nahas,Takuro Ishii,Billy Y S Yiu,Alfred C H Yu
Vector Doppler is well regarded as a potential way of deriving flow vectors to intuitively visualize complex flow profiles, especially when it is implemented at high frame rates. However, this technique's performance is known to suffer from aliasing artifacts. There is a dire need to devise real-time dealiasing solutions for vector Doppler. In this article, we present a new methodological framework
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Dynamic Ultrasound Focusing and Centimeter-Scale Ex Vivo Tissue Ablations With a CMUT Probe Developed for Endocavitary HIFU Therapies. IEEE Trans. Ultrason. Ferroelectr. Freq. Control. (IF 3.6) Pub Date : 2023-11-01 Ivan M Suarez-Castellanos,Geoffroy de Sallmard,Guillaume Vanstaevel,Alice Ganeau,Christopher Bawiec,Jean-Yves Chapelon,Nicolas Guillen,Nicolas Senegond,W Apoutou N'Djin
Thermal ablation of localized prostate tumors via endocavitary ultrasound-guided high-intensity focused ultrasound (USgHIFU) faces challenges that could be alleviated by better integration of dual modalities (imaging/therapy). Capacitive micromachined ultrasound transducers (CMUTs) may provide an alternative to existing piezoelectric technologies by exhibiting advanced integration capability through
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Diverging Polymer Acoustic Lens Design for High-Resolution Row-Column Array Ultrasound Transducers. IEEE Trans. Ultrason. Ferroelectr. Freq. Control. (IF 3.6) Pub Date : 2023-10-25 Melanie Audoin,Ali Salari,Borislav Gueorguiev Tomov,Kasper Flong Pedersen,Jorgen Arendt Jensen,Erik Vilain Thomsen
Spherical diverging acoustic lenses mounted on flat 2D Row-Column Addressed (RCA) ultrasound transducers have shown the potential to extend the Field of View (FOV) from a rectilinear to a curvilinear volume region and thereby enable 3D imaging of large organs. Such lenses are usually designed for small aperture low-frequency transducers, which have limited resolution. Moreover, they are made of off-the-shelf
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Boiling histotripsy using dual-frequency protocol on murine breast tumor model and promotes immune activation. IEEE Trans. Ultrason. Ferroelectr. Freq. Control. (IF 3.6) Pub Date : 2023-10-23 Tingting Qi,Yanshu Jing,Jie Deng,Juntao Chang,Weihao Sun,Rongzheng Yang,Xuan Liu,Quan Zhang,Mingxi Wan,Mingzhu Lu
Histotripsy is an ultrasound-guided, non-invasive, non-thermal ablation therapy that can mechanically lyse target tissues. There have been no reports of enhanced histotripsy for large-volume triple-negative breast cancer (TNBC). This study aims to verify the ability of a novel approach of dual-frequency mode combined with two-stage millisecond-length ultrasound pulses (DF-TS) to accelerate the treatment
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6-20 GHz 30% ScAlN Lateral Field-Excited Cross-Sectional Lamé Mode Resonators for Future Mobile RF Front Ends. IEEE Trans. Ultrason. Ferroelectr. Freq. Control. (IF 3.6) Pub Date : 2023-10-17 Gabriel Giribaldi,Luca Colombo,Matteo Rinaldi
This article reports on 30% scandium-doped AlN (ScAlN) lateral field-excited (LFE) cross-sectional Lame' mode resonators (CLMRs) with unprecedented performance in the 6-20 GHz range. By combining high-crystallinity 30% ScAlN piezoelectric thin films, a lithographic tunability of the resonance frequency, and a simple three-mask post-CMOS compatible fabrication process, we propose a technology platform
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Five Low-Noise Stable Oscillators Referenced to the Same Multimode AlN/Si MEMS Resonator. IEEE Trans. Ultrason. Ferroelectr. Freq. Control. (IF 3.6) Pub Date : 2023-10-17 Tahmid Kaisar,S M Enamul Hoque Yousuf,Jaesung Lee,Afzaal Qamar,Mina Rais-Zadeh,Soumyajit Mandal,Philip X-L Feng
We report on the first experimental demonstration of five self-sustaining feedback oscillators referenced to a single multimode resonator, using piezoelectric aluminum nitride on silicon (AlN/Si) microelectromechanical systems (MEMS) technology. Integrated piezoelectric transduction enables efficient readout of five resonance modes of the same AlN/Si MEMS resonator, at 10, 30, 65, 95, and 233 MHz with
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Dual-Backplate CMUTs With Wide Bandwidth and Low Driving Voltage for Airborne Applications. IEEE Trans. Ultrason. Ferroelectr. Freq. Control. (IF 3.6) Pub Date : 2023-10-17 Sebastian Anzinger,Christian Bretthauer,Hutomo Suryo Wasisto,Alfons Dehe
In this work, novel airborne capacitive micromachined ultrasonic transducers (CMUTs) based on a dual-backplate (DBP) technology are presented. In contrast to conventional CMUTs, these transducers use a three-electrode-based capacitive system, where the membrane is placed between two highly-perforated counter electrodes, enabling enlarged displacement amplitudes in electrostatic actuation and wide and
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Optimized Virtual Sources Distributions for 3-D Ultrafast Diverging Wave Compounding Imaging: A Simulation Study. IEEE Trans. Ultrason. Ferroelectr. Freq. Control. (IF 3.6) Pub Date : 2023-10-17 Goulven Le Moign,Patrice Masson,Olivier Basset,Herve Liebgott,Nicolas Quaegebeur
Ultrafast ultrasound imaging allows observing rapid phenomena; combined with 3-D imaging it has the potential to provide a more accurate analysis of organs which leads, in the end, to better diagnosis. Coherent compounding using diverging waves is commonly used to reconstruct high-quality images on large volumes while keeping the frame rate high enough to allow dynamic analysis. In practice, the virtual
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A Very Large Cardiac Channel Data Database (VLCD) Used to Evaluate Global Image Coherence (GIC) as an In Vivo Image Quality Metric. IEEE Trans. Ultrason. Ferroelectr. Freq. Control. (IF 3.6) Pub Date : 2023-10-17 Ole Marius Hoel Rindal,Tore Gruner Bjastad,Torvald Espeland,Erik Andreas Rye Berg,Svein-Erik Masoy
Ultrasound image quality is of utmost importance for a clinician to reach a correct diagnosis. Conventionally, image quality is evaluated using metrics to determine the contrast and resolution. These metrics require localization of specific regions and targets in the image such as a region of interest (ROI), a background region, and/or a point scatterer. Such objects can all be difficult to identify
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Automatic Probe Localization in Multiaperture Ultrasound by Radon Domain Signal Matching. IEEE Trans. Ultrason. Ferroelectr. Freq. Control. (IF 3.6) Pub Date : 2023-10-17 Hans-Martin Schwab,Richard G P Lopata
In multiaperture ultrasound, several ultrasound probes with different insonification angles are combined to increase the field of view and angular coverage of image structures. A full reconstruction incorporating all possible combinations of transmitting and receiving probes has been shown to improve resolution, contrast, and angular coverage beyond what can be achieved by the registration of single
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Contrast-Free Super-Resolution Power Doppler (CS-PD) Based on Deep Neural Networks. IEEE Trans. Ultrason. Ferroelectr. Freq. Control. (IF 3.6) Pub Date : 2023-10-17 Qi You,Matthew R Lowerison,Yirang Shin,Xi Chen,Nathiya Vaithiyalingam Chandra Sekaran,Zhijie Dong,Daniel Adolfo Llano,Mark A Anastasio,Pengfei Song
Super-resolution ultrasound microvessel imaging based on ultrasound localization microscopy (ULM) is an emerging imaging modality that is capable of resolving micrometer-scaled vessels deep into tissue. In practice, ULM is limited by the need for contrast injection, long data acquisition, and computationally expensive postprocessing times. In this study, we present a contrast-free super-resolution
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Efficient stratified 3D scatterer sampling for freehand ultrasound simulation. IEEE Trans. Ultrason. Ferroelectr. Freq. Control. (IF 3.6) Pub Date : 2023-10-12 Francois Gaits,Nicolas Mellado,Gauthier Bouyjou,Damien Garcia,Adrian Basarab
Ultrasound image simulation is a well-explored field with the main objective of generating realistic synthetic images, further used as ground truth for computational imaging algorithms, or for radiologists' training. Several ultrasound simulators are already available, most of them consisting in similar steps: (i) generate a collection of tissue mimicking individual scatterers with random spatial positions
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Swept-3D Ultrasound Imaging of the Mouse Brain Using a Continuously Moving 1D-Array Part I: Doppler Imaging. IEEE Trans. Ultrason. Ferroelectr. Freq. Control. (IF 3.6) Pub Date : 2023-10-03 Bastian S Generowicz,Stephanie Dijkhuizen,Chris I De Zeeuw,Sebastiaan K E Koekkoek,Pieter Kruizinga
Volumetric 3D Doppler ultrasound imaging can be used to investigate large scale blood dynamics outside of the limited view that conventional 2D power Doppler images (PDIs) provide. To create 3D PDIs, 2D-matrix array transducers can be used to insonify a large volume for every transmission, however these matrices suffer from low sensitivity, high complexity, and high cost. More typically, a 1D-array
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A Transverse Velocity Spectral Estimation Method for Ultrafast Ultrasound Doppler Imaging. IEEE Trans. Ultrason. Ferroelectr. Freq. Control. (IF 3.6) Pub Date : 2023-09-18 Bowen Jing,Dario I Carrasco,Nicholas AuYong,Brooks D Lindsey
A novel transverse velocity spectral estimation method is proposed to estimate the velocity component in the direction transverse to the beam axis for ultrafast imaging. The transverse oscillation was introduced by filtering the envelope data after the axial oscillation was removed. The complex transverse oscillated signal was then used to estimate the transverse velocity spectrum and mean velocity
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Impacts to FeRAM design arising from interfacial dielectric layers and wake up modulation in ferroelectric hafnium zirconium oxide. IEEE Trans. Ultrason. Ferroelectr. Freq. Control. (IF 3.6) Pub Date : 2023-09-13 M David Henry,Sean W Smith,Shelby S Fields,Samantha T Jaszewski,Giovanni Esteves,Helge Heinrich,Jon F Ihlefeld
As ferroelectric hafnium zirconium oxide (HZO) becomes more widely utilized in ferroelectric microelectronics, integration impacts of intentional and nonintentional dielectric interfaces and their effects upon the ferroelectric film wake up and circuit parameters become important to understand. In this work, the effect of the addition of a linear dielectric aluminum oxide, Al2O3, below a ferroelectric
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Design of (K, Na)NbO3-Based Lead-Free Piezoelectric Sounder by Utilizing Different Material Properties from Pb(Zr, Ti)O3. IEEE Trans. Ultrason. Ferroelectr. Freq. Control. (IF 3.6) Pub Date : 2023-09-04 Kentaro Ichihashi,Kazutoshi Tsukamura,Takeshi Kimura,Takashi Kasashima,Masato Yamazaki
By designing a unimorph suitable for the material properties of (K, Na)NbO3-based lead-free piezoelectric ceramics (KNN), we have developed a piezoelectric sounder with a sound pressure level that is superior to that of similar devices based on Pb(Zr, Ti)O3 (PZT) over a wide temperature range. The KNN ceramics used in this work have two disadvantages: their piezoelectric constant, d31, at room temperature
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Deep Learning Ultrasound Computed Tomography Under Sparse Sampling. IEEE Trans. Ultrason. Ferroelectr. Freq. Control. (IF 3.6) Pub Date : 2023-08-29 Xiaoyun Long,Junying Chen,Weiyong Liu,Chao Tian
Ultrasound computed tomography (USCT) is a fast-emerging imaging modality that is expected to help detect and characterize breast tumors by quantifying the distribution of the speed of sound (SOS) and acoustic attenuation in breast tissue. High-quality quantitative SOS reconstruction in USCT requires a large number of transducers, which incurs high system costs and slow computation. In contrast, sparsely
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SAW Filters on LiNbO3/SiC Heterostructure for 5G n77 and n78 Band Applications. IEEE Trans. Ultrason. Ferroelectr. Freq. Control. (IF 3.6) Pub Date : 2023-08-29 Huiping Xu,Sulei Fu,Rongxuan Su,Peisen Liu,Shuai Zhang,Zengtian Lu,Boyuan Xiao,Rui Wang,Cheng Song,Fei Zeng,Weibiao Wang,Feng Pan
The 5G communication system has experienced a substantial expansion of the spectrum, which poses higher requirements to radio frequency (RF) filters in enhancing their operating frequencies and bandwidths. To this end, this work focused on solving the filtering scheme for challenging 5G n77 and n78 bands and successfully implemented the corresponding spurious-free surface acoustic wave (SAW) filters
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Ultrasonic Imaging Based on Pulsed Airy Beams. IEEE Trans. Ultrason. Ferroelectr. Freq. Control. (IF 3.6) Pub Date : 2023-08-29 Xizhou Chen,Fansong Dong,Chuhao Yin,Juan Tu,Dong Zhang,Xiasheng Guo
In ultrasonic imaging, high impedance obstacles in tissues may lead to artifacts behind them, making the examination of the target area difficult. Acoustical Airy beams possess the characteristics of self-bending and self-healing within a specific range. They are limited-diffracting when generated from finite aperture sources and are expected to have great potential in medical imaging and therapy.
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Improved Ultrafast Power Doppler Imaging Using United Spatial-Angular Adaptive Scaling Wiener Postfilter. IEEE Trans. Ultrason. Ferroelectr. Freq. Control. (IF 3.6) Pub Date : 2023-08-29 Yadan Wang,Lijie Huang,Rui Wang,Xingyue Wei,Chichao Zheng,Hu Peng,Jianwen Luo
Ultrafast power Doppler imaging (uPDI) using high-frame-rate plane-wave transmission is a new microvascular imaging modality that offers high Doppler sensitivity. However, due to the unfocused transmission of plane waves, the echo signal is subject to interference from noise and clutter, resulting in a low signal-to-noise ratio (SNR) and poor image quality. Adaptive beamforming techniques are effective
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Comb Detection for Measuring Shear Wave Propagation. IEEE Trans. Ultrason. Ferroelectr. Freq. Control. (IF 3.6) Pub Date : 2023-08-29 Hyoung-Ki Lee,Philip M Holmes,James F Greenleaf,Matthew W Urban
Plane wave compounding (PWC) is widely used to measure the propagation of shear waves. Implementing PWC on most commercial ultrasound scanners is challenging because all channel (>128) data must be processed or transferred to the host computing unit in real time. Comb detection transmits multiple focused beams simultaneously and results in a reduced number of receive lines to be processed in parallel
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Design and Fabrication of Annular-Array Ultrasound Transducer Based (K, Na) NbO3 Lead-Free 1-3 Piezoelectric Composite. IEEE Trans. Ultrason. Ferroelectr. Freq. Control. (IF 3.6) Pub Date : 2023-08-09 Zhiqing Zhang,Xiaoxiang An,Shifeng Guo,Xiaoyue Gong,Qingqing Ke
This paper reports the design, fabrication, and performance of an annular-array ultrasound transducer using KNN-based lead-free 1-3 piezoelectric composite. The 1-3 piezoelectric composite based on lead-free 0.965 (K0.45Na0.55) (Nb0.96Sb0.04) O3-0.035 Bi0.5Na0.5Zr0.85Hf0.15O3 (KNNS-BNZH) was first prepared with the dice-and-fill method. Different from previous reported studies, by patterning annular
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Acoustoelectric Time-Reversal for Ultrasound Phase-Aberration Correction. IEEE Trans. Ultrason. Ferroelectr. Freq. Control. (IF 3.6) Pub Date : 2023-08-02 Chet Preston,Alexander M Alvarez,Margaret Allard,Andres Barragan,Russell S Witte
Acoustoelectric imaging (AEI) is a technique that combines ultrasound (US) with radio frequency recording to detect and map local current source densities. This study demonstrates a new method called acoustoelectric time reversal (AETR), which uses AEI of a small current source to correct for phase aberrations through a skull or other US-aberrating layers with applications to brain imaging and therapy
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Frequency-Dependent F-Number Suppresses Grating Lobes and Improves the Lateral Resolution in Coherent Plane-Wave Compounding. IEEE Trans. Ultrason. Ferroelectr. Freq. Control. (IF 3.6) Pub Date : 2023-08-29 Martin F Schiffner,Georg Schmitz
Ultrafast imaging modes, such as coherent plane-wave compounding (CPWC), increase image uniformity and reduce grating lobe artifacts by dynamic receive apertures. The focal length and the desired aperture width maintain a given ratio, which is called the F -number. Fixed F -numbers, however, exclude useful low-frequency components from the focusing and reduce the lateral resolution. Herein, this reduction
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Ultrasound-Based Registration for the Computer-Assisted Navigated Percutaneous Scaphoid Fixation. IEEE Trans. Ultrason. Ferroelectr. Freq. Control. (IF 3.6) Pub Date : 2023-08-29 Peter Brosner,Benjamin Hohlmann,Kristian Welle,Klaus Radermacher
An ultrasound (US)-based computer-assisted approach has the potential to improve the accuracy and precision of screw placement for the percutaneous fixation of scaphoid fractures and also reduce the radiation dose for patient and clinical staff. Therefore, a surgical plan based on preoperative diagnostic computed tomography (CT) is registered with intraoperative US images, enabling a navigated percutaneous
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Contrast-Enhanced Imaging of Histotripsy Bubble Clouds Using Chirp-Coded Excitation and Volterra Filtering. IEEE Trans. Ultrason. Ferroelectr. Freq. Control. (IF 3.6) Pub Date : 2023-08-29 Vishwas V Trivedi,Emily L Wallach,Kenneth B Bader,Himanshu Shekhar
Histotripsy is a focused ultrasound therapy that ablates tissue via bubble cloud activity. Real-time ultrasound image guidance is used to ensure safe and effective treatment. Plane-wave imaging enables tracking of histotripsy bubble clouds at a high frame rate but lacks adequate contrast. Furthermore, bubble cloud hyperechogenicity is reduced in abdominal targets, making the development of contrast-specific
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In Vivo Multithread Ultrasound Thermal Strain Imaging. IEEE Trans. Ultrason. Ferroelectr. Freq. Control. (IF 3.6) Pub Date : 2023-08-02 Chuhao Yin,Fansong Dong,Huajin Su,Juan Tu,Dong Zhang,Xiangqing Kong,Xiasheng Guo
While thermal therapy is increasingly applied in clinics, real-time temperature monitoring in the target tissue can facilitate improvements in the planning, controlling, and evaluating of therapeutic procedures. Thermal strain imaging (TSI), based on tracking the echo shifts in ultrasound images, has great potential for temperature estimation as is demonstrated in vitro. However, due to physiological
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An Automatic 3D Ultrasound and Photoacoustic Combined Imaging System for Human Inflammatory Arthritis. IEEE Trans. Ultrason. Ferroelectr. Freq. Control. (IF 3.6) Pub Date : 2023-06-28 Xiaorui Peng,Aaron Dentinger,Shivangi Kewalramani,Zhanpeng Xu,Steven Gray,Soumya Ghose,Yew Teck Tan,Zhaoyuan Yang,Janggun Jo,David Chamberland,Guan Xu,Nada Abdulaziz,Girish Gandikota,David Mills,Xueding Wang
Aiming at a point-of-care device for rheumatology clinics, we developed an automatic 3D imaging system combining the emerging photoacoustic imaging with conventional Doppler ultrasound for detecting human inflammatory arthritis. This system is based on a commercial-grade GE HealthCare (GEHC, Chicago, IL) Vivid™ E95 ultrasound machine and a Universal Robot UR3 robotic arm. This system automatically
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Methods for Enhancing the Robustness of the Generalized Contrast-to-Noise Ratio. IEEE Trans. Ultrason. Ferroelectr. Freq. Control. (IF 3.6) Pub Date : 2023-08-02 Siegfried Schlunk,Brett C Byram
The generalized contrast-to-noise ratio (gCNR) is a new but increasingly popular metric for measuring lesion detectability due to its use of probability distribution functions that increase robustness against transformations and dynamic range alterations. The value of these kinds of metrics has become increasingly important as it becomes clear that traditional metrics can be arbitrarily boosted with
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Fast Thresholding of SVD Clutter Filter Using the Spatial Similarity Matrix and a Sum-Table Algorithm. IEEE Trans. Ultrason. Ferroelectr. Freq. Control. (IF 3.6) Pub Date : 2023-08-02 Jerome Baranger,Julien Aguet,Olivier Villemain
Singular value decomposition (SVD) has become a standard for clutter filtering of ultrafast ultrasound datasets. Its implementation requires the choice of appropriate thresholds to discriminate the singular value subspaces associated with tissue, blood, and noise signals. Comparing the similarity of the spatial singular vectors was shown to be a robust and efficient method to estimate the SVD thresholds
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Enhancement of Boiling Histotripsy by Steering the Focus Axially During the Pulse Delivery. IEEE Trans. Ultrason. Ferroelectr. Freq. Control. (IF 3.6) Pub Date : 2023-08-02 Gilles P L Thomas,Tatiana D Khokhlova,Oleg A Sapozhnikov,Vera A Khokhlova
Boiling histotripsy (BH) is a pulsed high-intensity focused ultrasound (HIFU) method relying on the generation of high-amplitude shocks at the focus, localized enhanced shock-wave heating, and bubble activity driven by shocks to induce tissue liquefaction. BH uses sequences of 1-20 ms long pulses with shock fronts of over 60 MPa amplitude, initiates boiling at the focus of the HIFU transducer within
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How Does Ambient Temperature Fluctuation Influence the Short-Term Frequency Stability of OCXO? IEEE Trans. Ultrason. Ferroelectr. Freq. Control. (IF 3.6) Pub Date : 2023-08-02 Lin Xu,Peng Ye,Shuang Liao,Cheng Chen,Feng Tan
Short-term frequency stability (STFS) is one of the most important specification of oven-controlled crystal oscillators (OCXOs). Although numerous studies have investigated factors that influence STFS, research on the impact of ambient temperature fluctuation is rare. This work investigates the relationship between the ambient temperature fluctuation and the STFS by introducing a model of the OCXO's
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A Review of Eigenmode and Frequency Control in Piezoelectric MEMS Resonators. IEEE Trans. Ultrason. Ferroelectr. Freq. Control. (IF 3.6) Pub Date : 2023-10-17 Zhenming Liu,Farrokh Ayazi
Piezoelectric microelectromechanical systems (MEMS) resonators possess favorable properties, such as strong electromechanical coupling, high Q , and polarized linear transduction, making them ideal for various applications, including timing, sensing, and RF communication. However, due to process nonidealities and temperature variations, these resonators characteristics may deviate from their designed
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4H-Silicon Carbide as an Acoustic Material for MEMS. IEEE Trans. Ultrason. Ferroelectr. Freq. Control. (IF 3.6) Pub Date : 2023-10-17 Yaoyao Long,Zhenming Liu,Farrokh Ayazi
This article discusses the potential of 4H-silicon carbide (SiC) as a superior acoustic material for microelectromechanical systems (MEMS), particularly for high-performance resonator and extreme environments applications. Through a comparison of the crystalline structure along with the mechanical, acoustic, electrical, and thermal properties of 4H with respect to other SiC polytypes and silicon, it
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Development of Tunable Ferroelectric Ceramic Capacitors. IEEE Trans. Ultrason. Ferroelectr. Freq. Control. (IF 3.6) Pub Date : 2023-08-02 Rangel G Aredes,Eduardo Antonelli,Lauro P Silva Neto,Jose O Rossi,Gustavo N Lima,Joaquim J Barroso,Elizete G L Rangel,Edl Schamiloglu
Ferroelectric perovskite ceramics with a high dielectric constant, low loss, high tunability, and high electric breakdown are ideal for nonlinear transmission lines (NLTLs) to generate radio frequency (RF) signals at high-power levels. To achieve the required properties, a comprehensive study of the material phase transitions and the optimal ratio adjustment between the chemical elements in the perovskite
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Dynamic Mode Suppression and Frequency Tuning in S-Band GaN/YIG Magnetoelastic HBARs. IEEE Trans. Ultrason. Ferroelectr. Freq. Control. (IF 3.6) Pub Date : 2023-08-02 Vikrant J Gokhale,Albrecht Jander,Brian P Downey,Pallavi Dhagat,Shawn C Mack,D Scott Katzer,Jason A Roussos,David J Meyer
This work presents the detailed characterization and analysis of recently reported magnetoelastic high-overtone bulk acoustic resonators (ME-HBARs), which are multimode RF-acoustic (phononic) resonators operating in the S -band. These unique devices are fabricated by microtransfer printing (MTP) piezoelectric GaN transducers onto a ferrimagnetic yttrium iron garnet (YIG) substrate. The YIG substrate