A5101680609- Ultrasound Imaging and Elastography
- Photoacoustic and Ultrasonic Imaging
- Ultrasound and Hyperthermia Applications
- Ultrasonics and Acoustic Wave Propagation
- Laser Material Processing Techniques
- Photonic and Optical Devices
- Advanced Photonic Communication Systems
- Tendon Structure and Treatment
- Advanced Surface Polishing Techniques
- Elasticity and Material Modeling
- Photonic Crystals and Applications
- Liver Disease Diagnosis and Treatment
- Botulinum Toxin and Related Neurological Disorders
- Adaptive optics and wavefront sensing
- Muscle activation and electromyography studies
- Diamond and Carbon-based Materials Research
- Optical Systems and Laser Technology
- Surface Roughness and Optical Measurements
- Cerebral Palsy and Movement Disorders
- Optical Wireless Communication Technologies
- Blood properties and coagulation
- Semiconductor Lasers and Optical Devices
- Seismic Imaging and Inversion Techniques
- Cardiovascular Function and Risk Factors
- Body Composition Measurement Techniques
China University of Mining and Technology
2024
Beijing Institute of Petrochemical Technology
2024
Dalian Medical University
2023-2024
Dalian University
2024
Shanghai Electric (China)
2024
Chengdu Fine Optical Engineering Research Center
2016-2021
Shandong University
2021
Mayo Clinic in Florida
2018
Mayo Clinic
2010-2017
National Institute on Aging
2016
Fast and accurate tissue elasticity imaging is essential in studying dynamic mechanical properties. Various ultrasound shear techniques have been developed the last two decades. However, to reconstruct a full field-of-view 2-D map, multiple data acquisitions are typically required. In this paper, novel technique, comb-push elastography (CUSE), introduced which only one rapid acquisition (less than 35 ms) needed wave speed map (40 × 38 mm). Multiple unfocused beams arranged comb pattern...
An interlaboratory study of shear wave speed (SWS) estimation was performed. Commercial elastography systems from Fibroscan, Philips, Siemens and Supersonic Imagine, as well several custom laboratory systems, were involved. Fifteen sites included in the study. CIRS manufactured donated 11 pairs phantoms designed for purposes this investigation. Dynamic mechanical tests equivalent phantom materials also The results demonstrate that there is very good agreement among SWS but are sources bias...
Two-dimensional shear-wave elastography presents 2-D quantitative shear elasticity maps of tissue, which are clinically useful for both focal lesion detection and diffuse disease diagnosis. Realization on conventional ultrasound scanners, however, is challenging because the low tracking pulse-repetition-frequency (PRF) these systems. Although some clinical research platforms support software beamforming plane-wave imaging with high PRF, majority current systems do not have capability, a...
Ultrasound and magnetic resonance elastography techniques are used to assess mechanical properties of soft tissues. Tissue stiffness is related various pathologies such as fibrosis, loss compliance, cancer. One way perform measuring shear wave velocity propagating waves in tissue induced by intrinsic motion or an external source vibration, relating the elasticity. All tissues inherently viscoelastic ignoring viscosity biases velocity-based estimates elasticity ignores a potentially important...
Ultrasound tissue harmonic imaging is widely used to improve ultrasound B-mode quality thanks its effectiveness in suppressing artifacts associated with reverberation, phase aberration, and clutter noise. In shear wave elastography (SWE), because the motion signal extracted from signal, these noise sources can significantly deteriorate tracking process consequently result noisy biased detection. This situation exacerbated vivo SWE applications such as heart, liver, kidney. paper, therefore,...
Comb-push ultrasound shear elastography (CUSE) has recently been shown to be a fast and accurate 2-D elasticity imaging technique that can provide full field-of-view (FOV) wave speed map with only one rapid data acquisition. The initial version of CUSE was termed U-CUSE because unfocused push beams were used. In this paper, we present two new versions CUSE-focused (F-CUSE) marching (M-CUSE), which use focused improve acoustic radiation force penetration produce stronger waves in deep tissues...
The purpose of this study was to investigate the feasibility and reliability passive muscle stiffness measurements in children by shear wave ultrasound elastography.We conducted a prospective cross-sectional quantifying bilateral lateral gastrocnemius muscles during stretching 20 typically developing (age range, 2.0-12.6 years). Data collected included (shear modulus kilopascals) at 4 positions progressive foot dorsiflexion, demographic characteristics participants, comparison with...
Shear wave speed can be used to assess tissue elasticity, which is associated with health. Ultrasound shear elastography techniques based on measuring the propagation of waves induced by acoustic radiation force are becoming promising alternatives biopsy in liver fibrosis staging. However, generated such methods typically very weak. Therefore, penetration may become problematic, especially for overweight or obese patients. In this study, we developed a new method called external vibration...
Objective The aim of this study was to evaluate the potential for shear wave elastography (SWE) measure passive biceps brachii individual muscle stiffness as a musculoskeletal manifestation chronic stroke. Design This cross-sectional study. Nine subjects with stroke were evaluated using Fugl-Meyer and Modified Ashworth scales. Electromyography, joint torque, SWE obtained during elbow extension in four controls. Torque values at time points corresponding each measurement all trials selected...
The Achilles tendon plays an important role in soleus and gastrocnemius muscle functions, including proper force transmission movement generation. However, few studies have examined concurrent changes of properties neurologic disorders. objective this study was to investigate the morphologic characteristics both calf fascicles children with cerebral palsy (CP).A cross-sectional planned, 12 CP 11 typically developing participated study. For groups, B-mode ultrasonography used evaluate...
Ultrasound images of muscle fascicles have been widely used to investigate properties under static/dynamic and pathologic conditions. Fascicle are usually detected measured manually, which is subjective time consuming, especially when dealing with large number images. In this study, an automatic linear extraction method based on localized Radon transform revoting strategy proposed detect track in ultrasound The performance the compared another feature Hough using both simulated generated by...
Calf muscles and Achilles tendon play important roles in functional activities. However, it is not clear how biomechanical properties of the uniarticular soleus (SOL) biarticular gastrocnemius muscle tendon, including fascicle length, pennation angle, stiffness, change concurrently post stroke. Biomechanical medial (GM) were evaluated bilaterally 10 hemiparetic stroke survivors using combined ultrasonography-biomechanical measurements. cross-sectional area (CSA), Young's modulus evaluated,...
Magnetic resonance elastography (MRE) has excellent performance in detecting liver fibrosis and is becoming an alternative to biopsy clinical practice. Ultrasound techniques based on measuring the propagation speed of shear waves induced by acoustic radiation force also have shown promising results for staging. The objective this study was compare ultrasound-based wave measurement MRE.
Ultrasound and magnetic resonance elastography techniques are used to assess mechanical properties of soft tissues. Tissue stiffness is related various pathologies such as fibrosis, loss compliance cancer. The basic principle methods measuring shear wave velocity in tissue due intrinsic motion or an external source vibration, relating the elasticity. All inherently viscoelastic ignoring viscosity biases velocity-based estimates elasticity ignores a potentially important parameter health. We...
Spasticity is common following stroke; however, high subject variability and unreliable measurement techniques limit research treatment advances. Our objective was to investigate the use of shear wave elastography (SWE) characterize spastic reflex in biceps brachii during passive elbow extension an individual with spasticity. The patient a 42-year-old right-hand-dominant male history right middle cerebral artery-distribution ischemic infarction causing left hemiparesis. We compared...
This paper mainly focuses on the influence of colloidal silica polishing damage performance fused optics. In this paper, nanometer sized and micron ceria are used to polish The polished samples exhibit that root-mean-squared (RMS) average surface roughness values 0.7 nm 1.0 nm, respectively. subsurface defects optics analyzed discussed. It is revealed will introduce much fewer absorptive contaminant elements damages especially no trailing indentation fracture. 355-nm laser test reveals each...
Two-dimensional (2D) shear wave elastography has emerged as a popular clinical and research tool for variety of applications. Implementing 2D on conventional ultrasound scanner, however, is challenging task due to the low imaging frame rate, which essentially limited by parallel beamforming capability provided hardware beamformers these scanners. This study developed time aligned sequential tracking (TAST) technique that enables high pulse repetition frequency (PRF) The Comb-push Ultrasound...
Multiple push-detect acquisitions are typically required in current acoustic radiation force based shear wave elasticity imaging methods to reconstruct a full FOV map, which can result potential motion artifacts and difficulties studying tissue dynamic mechanical properties. Comb-push Ultrasound Shear Elastography (CUSE) is novel fast technique utilizes the comb-push produce complex field with waves propagating through all pixels so that map be reconstructed only one rapid data acquisition...
Shearwave Dispersion Ultrasound Vibrometry (SDUV) measures tissue elasticity and viscosity by quantifying dispersion of shear wave propagation velocity. Long tone bursts focused ultrasound are transmitted an array transducer to a push origin at pulse repetition frequency f <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">p</sub> produce multi-tone waves its harmonics. Shear monitored echo the same between bursts. The Voigt model is fitted...