A5055689769- Photoacoustic and Ultrasonic Imaging
- Ultrasound and Hyperthermia Applications
- Ultrasound Imaging and Elastography
- Energy Harvesting in Wireless Networks
- Antenna Design and Analysis
- RFID technology advancements
- Wireless Power Transfer Systems
- Thermography and Photoacoustic Techniques
- Kidney Stones and Urolithiasis Treatments
- Microwave Engineering and Waveguides
- Antenna Design and Optimization
- Iterative Learning Control Systems
- Renal and Vascular Pathologies
- Advanced ceramic materials synthesis
- Advanced Surface Polishing Techniques
- Optical Imaging and Spectroscopy Techniques
- Microstructure and Mechanical Properties of Steels
- Pediatric Urology and Nephrology Studies
- Advanced X-ray and CT Imaging
- Robotic Mechanisms and Dynamics
- Optical Coherence Tomography Applications
- Material Properties and Processing
- Extracellular vesicles in disease
- Analytical Chemistry and Sensors
- Breast Lesions and Carcinomas
University College London
2020-2024
Citrix (Switzerland)
2024
Tongji University
2024
Harbin Institute of Technology
2024
Fudan University
2024
Zhongshan Hospital
2024
Imperial College London
2017-2022
Tianjin University of Technology
2019-2022
University of Electronic Science and Technology of China
2007-2021
San Diego State University
2018-2020
Background Variations in lymph node (LN) microcirculation can be indicative of metastasis. The identification and quantification metastatic LNs remains essential for prognosis treatment planning, but a reliable noninvasive imaging technique is lacking. Three-dimensional super-resolution (SR) US has shown potential to noninvasively visualize microvascular networks vivo. Purpose To study the feasibility three-dimensional SR rabbit LN structure blood flow by using microbubbles. Materials...
High-frame-rate 3-D ultrasound imaging technology combined with super-resolution processing method can visualize microvascular structures by overcoming the diffraction-limited resolution in every spatial direction. However, using a full 2-D array requires system large number of independent channels, design which might be impractical due to high cost, complexity, and volume data produced. In this study, sparse was designed fabricated 512 elements chosen from density-tapered spiral layout....
Purpose: To clarify appropriate combinations of flexible ureteroscope (FURS) and ureteral access sheath (UAS), which can maintain a low intrapelvic pressure (IPP) during FURS with lasertripsy. Methods: Four kinds FURSs (Polyscope, Olympus URF-P6, Stroz Flex-Xc, URF-V) six sizes UASs (11/13F × 36 cm, 11/13F 46 12/14F 13/15F cm) were tested. A novel gas-liquid-pressure-control system (GLPCS) was used to stable adjustable irrigation form 50–500 cmH2O. IPPs flow rates recorded different by using...
Localization-based ultrasound super-resolution imaging using microbubble contrast agents and phase-change nano-droplets has been developed to visualize microvascular structures beyond the diffraction limit. However, long data acquisition time makes clinical translation more challenging. In this study, fast acoustic wave sparsely activated localization microscopy (fast-AWSALM) was achieve super-resolved frames with sub-second temporal resolution, by low-boiling-point octafluoropropane...
A number of acoustic super-resolution techniques have recently been developed to visualize microvascular structure and flow beyond the diffraction limit. crucial aspect all ultrasound (US) (SR) methods using single microbubble localization is time-efficient detection individual bubble signals. Due need for bubbles circulate through vasculature during acquisition, slow flows associated with microcirculation limit minimum acquisition time needed obtain adequate spatial information. Here, a...
A three-coil wireless charging system is proposed for full metal-cover smartphone applications. Considering the space limitation and other antennas in smartphone, receiver coil embedded designed to be miniaturized as 16 mm × 65 mm. By integrating a series capacitance at end of 2-mm width narrow horizontal slot loading on metal cover, cover converted relay power transfer (WPT) through thus achieved. prototype has been built WPT validated via experiment. The experimental results show that...
A near field communication (NFC)-connected coupler using inductive power transfer (IPT)-capacitive (CPT)-combined wireless charging is proposed for metal-cover smartphone applications. To mitigate eddy current loss in the metal cover, CPT introduced. Compared with traditional CPT, through a cover realized, and cost valuable space inside are saved. achieve itself separated by cross slot utilized as receiving plates. reduce voltage across within safety range, IPT applied. The already-existing...
Detecting and distinguishing metastatic lymph nodes (LNs) from those with benign lymphadenopathy are crucial for cancer diagnosis prognosis but remain a clinical challenge. A recent advance in super-resolution ultrasound (SRUS) through localizing individual microbubbles has broken the diffraction limit tracking enabled vivo noninvasive imaging of vascular morphology flow dynamics at microscopic level. In this study we hypothesize that SRUS enables quantitative markers to distinguish LNs ones...
Ultrasound super-resolution techniques use the response of microbubble (MB) contrast agents to visualize microvasculature. Techniques that localize isolated bubble signals first require detection algorithms separate MB and tissue responses. This work explores three main for Pulse inversion (PI), differential imaging (DI), singular value decomposition (SVD) filtering were compared in terms localization accuracy, precision, contrast-to-tissue ratio. responses simulated based on properties...
A two-dimensionally (2-D) scanning multibeam array with planar structure and low sidelobe level (SLL) is realized in this paper. It for the first time that SLL of 2-D properly addressed. To suppress SLL, a 4 × 16 beam-forming network (BFN) proposed Different from existing schemes, such BFN can provide tapered illuminations two orthogonal directions thus be applied to realize low-SLL beams. The formed by interconnecting sets sub-BFNs, each which stacked several 2 Butler matrices (BMs). Like...
This letter proposes a novel capacitive coupler array with free-positioning feature for mobile tablet applications. The consists of three printed circuit boards, two which constitute the transmitter and third one is receiver. vertically arranged to make charging system compact feasible By applying repetitive structure on side properly designing receiver, realized coil-to-coil efficiency not affected by variation receiver position. Only series inductances are utilized compensation purposes,...
The use of a planar detection geometry in photoacoustic tomography results the so- called limited-view problem due to finite extent acoustic aperture. When images are reconstructed using one-step reconstruction algorithms, image quality is compromised by presence streaking artefacts, reduced contrast, distortion and signal-to-noise ratio. To mitigate this, model-based iterative approaches based on least squares minimisation with without total variation regularization were evaluated...
This paper proposes a near-field communication (NFC) antenna solution for metal-cover smartphone applications. In this NFC solution, narrow slot is initially loaded into the metal cover, and position of can be altered (with flexibility) according to design smartphone's external appearance. Next, an unconventional six-turn coil six-sided irregular hexagonal shape) designed that has nonuniform linewidth line gap between two lines, it partially with rectangular ferrite composite. design,...
A simple multibeam antenna fed by a modified horn beam-forming network (BFN) is realized in substrate integrated waveguide technology. Compared with Rotman lens antenna, such an has the merits of architecture and design process. The BFN applied here developed from traditional adding multiple lateral feeds to perform beam scanning property. operation principle, method, performance are illustrated sequentially. Fabrication measurement conducted test consistency between simulation experiment.
Super-resolution ultrasound imaging has been so far achieved in 3-D by mechanically scanning a volume with linear probe, co-aligning multiple probes, using multiplexed 3- D clinical systems, or research systems. In this study, 2-D sparse array was designed 512 elements according to density-tapered spiral layout and optimized reduce the sidelobes of transmitted beam profile. High frame rate volumetric compounded plane waves performed two synchronized ULA-OP256 Localization-based...
A near-field communication capacitive power transfer (NFC-CPT)-combined coupler with a series-none compensation topology is proposed for metal-cover smartphone applications. To achieve through metal cover, the cover itself used as receiving plates. realize NFC cross slot including slim horizontal and rectangular embedded on which mitigates eddy current loss increases inductive coupling antenna. Besides, divides into two separate plates, necessary transfer. Considering space limitation safety...
A near-field communication (NFC) dual-loop antenna with a miniaturized size of 15 mm×25 mm is initially proposed for full metalcover smartphone applications. To achieve small clearance zone on the metal cover, rectangular slot 8 mm×16 loaded into cover. allow good inductive coupling, NFC only 0.37 beneath center slot. Because that, direction eddy current induced cover will be same as antenna. It noteworthy that prototype integrated single was certified by Europay, MasterCard, and Visa test.
A useful method to transform the smartphone metal cover into an antenna booster for near-field communication (NFC) installed in a full (FMC) is proposed. In this proposed work, by properly embedding series capacitor meticulously selected location within cover, strong coupling between NFC coil and will be generated, which mitigates reverse eddy current induced on cover. Because of that, performance (located below narrow horizontal slot-loaded cover) substantially improved, as compared...
Motion during image acquisition can cause degradation in all medical imaging modalities. This is particularly relevant 2-D ultrasound imaging, since out-of-plane motion only be compensated for movements smaller than elevational beamwidth of the transducer. Localization based super-resolution creates even a more challenging correction task due to requirement high number acquisitions form single super-resolved frame. In this study, an extension two-stage method proposed 3-D correction....
Current localization-based super-resolution ultrasound imaging requires a low concentration of flowing microbubbles to visualize microvasculature beyond the diffraction limit and acquisition is slow. Nanodroplets offer promising solution as they can be sparsely activated deactivated on-demand. In this study, acoustic wave sparsely-activated localization microscopy (AWSALM) using activation deactivation nanodroplets, an counterpart photo-activated (PALM) which less dependent on agent presence...