Abstract：
:The characterization of brain tissue is crucial to better understand neurological disorders. Mechanical characterization is an emerging tool in that field. The purpose of this work was to validate a transient ultrasound technique aimed at measuring dispersion of mechanical parameters of the brain tissue. The first part of this work was dedicated to the validation of that technique by comparing it with two proven rheology methods: a rotating plate rheometer, and a viscoelastic spectroscopy apparatus. Experiments were done on tissue mimicking gels. Results were compared on storage and loss modulus in the 20-100 Hz band. Our method was validated for the measurement of storage modulus dispersion, with some reserves on the measurement of loss modulus. The second part of this work was the measurement of the mechanical characteristics of ex vivo human white matter. We were able to measure the dispersion of the storage and loss modulus in the 20-100 Hz band, fitting the data with a custom power law model.
journal_name
Ultrasonicsjournal_title
Ultrasonicsauthors
Nicolas E,Callé S,Nicolle S,Mitton D,Remenieras JPdoi
10.1016/j.ultras.2017.10.009subject
Has Abstractpub_date
2018-03-01 00:00:00pages
119-125eissn
0041-624Xissn
1874-9968pii
S0041-624X(17)30022-7journal_volume
84pub_type
杂志文章相关文献
ULTRASONICS文献大全abstract：:One of the fundamental theorems in (optical, acoustical, quantum, gravitational) wave scattering is the optical theorem for plane waves, which relates the extinction cross-section to the forward scattering complex amplitude function. In this analysis, the optical theorem is extended for the case of 3D-beams of arbitra...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2016.01.006
更新日期：2016-04-01 00:00:00
abstract：:The radial variations in the velocity of longitudinal waves propagating through Japanese cedar and Japanese cypress were experimentally investigated. In addition, the tracheid length (TL), microfibril angle (MFA), air-dried density (AD), and moisture content (MC) were measured in order to determine the effect of wood ...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2010.10.001
更新日期：2011-04-01 00:00:00
abstract：:Molecular techniques are transforming our understanding of cellular function and disease. However, accurate molecular analysis methods will be limited if the input DNA, RNA, or protein is not derived from pure population of cells or is contaminated by the wrong cells. A novel Ultrasonic Vibration Micro-dissection (UVM...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2006.06.010
更新日期：2006-12-22 00:00:00
abstract：:This article describes the use of the frequency domain finite element (FDFE) technique for guided wave mode selection in inhomogeneous waveguides. Problems with Rayleigh-Lamb and Shear-Horizontal mode excitation in isotropic homogeneous plates are first studied to demonstrate the application of the approach. Then, two...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2015.12.007
更新日期：2016-04-01 00:00:00
abstract：:This paper presents the influence of ultrasonic beam ray refraction effect on the internal object structure imaging using the ultrasound transmission tomography method (UTT), in parallel ray projection geometry, for ultrasonic pulse run-time measurements. Simulation calculations carried out using specially elaborated ...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/s0041-624x(99)00137-7
更新日期：2000-03-01 00:00:00
abstract：:Experimental studies of thermal effects in high-intensity focused ultrasound (HIFU) procedures are often performed with the aid of fine wire thermocouples positioned within tissue phantoms. Thermocouple measurements are subject to several types of error which must be accounted for before reliable inferences can be mad...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2010.07.007
更新日期：2011-02-01 00:00:00
abstract：:Ultrasonic wave tunneling through seriously mismatched media, such as steel and water, is possible only when the frequency matches the resonance of the steel plate. But it is nearly impossible to realize continuous wave tunneling if the low acoustic impedance media is air because the transducer frequency cannot be mad...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2017.07.018
更新日期：2018-01-01 00:00:00
abstract：:As biotechnology develops, techniques for manipulating and separating small particles such as cells and DNA are required in the life sciences. This paper investigates on-chip manipulation of microparticles in small channels by using ultrasonic vibration. The chip consists of a rectangular glass substrate with a cross-...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2016.11.026
更新日期：2017-08-01 00:00:00
abstract：:We derive a simple expression, which gives an approximate value of the Rayleigh wave velocity in an isotropic solid. This approximation is five times better than that given by Viktorov. The velocity equation can be easily inverted in order to obtain an accurate determination of the elastic constants. This procedure ca...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2006.09.006
更新日期：2007-03-01 00:00:00
abstract：:We analyze experimentally and theoretically the sound propagation velocity of P-waves in granular media made of micrometer-size magnetite particles under an external magnetic field. The sound velocity is measured in a coherent (long-wavelength) regime of propagation after a controlled sample preparation consisting of ...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2017.07.021
更新日期：2018-01-01 00:00:00
abstract：:The accurate estimation of time of flight (TOF) of an ultrasonic signal is essential in ultrasonic non-destructive testing (NDT). A novel method for TOF estimation based on the short-time Fourier transform (STFT) is proposed in this paper. Firstly, the time and frequency components of ultrasonic echoes are represented...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2020.106104
更新日期：2020-04-01 00:00:00
abstract：:An influence of ultrasonic treatment (drawing) on structure, high temperature durability, evaporation and creep behaviours of tungsten single crystal and wires were investigated. A relation of tungsten wires properties with dislocation distribution was determined. ...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2004.02.002
更新日期：2004-04-01 00:00:00
abstract：:Explicit integral representations for the wave fields generated by air-coupled or underwater transducers in an acoustic medium with a submerged elastic (metallic or laminate composite) plate are obtained in the form of path Fourier integrals. Together with the far-field asymptotics for the incident, reflected, transmi...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2018.10.001
更新日期：2019-04-01 00:00:00
abstract：:The objective of this paper is to present recent investigations in characteristics of the sound field generated by neurosurgical endoscopic ultrasonic probes (NEUPs) for minimally invasive surgery. The importance of this information has been investigated and discussed taking into account following facts: 1. According ...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/s0041-624x(02)00217-2
更新日期：2002-05-01 00:00:00
abstract：:An approximate formula has been developed to determine the electromechanical coupling coefficient of the piezoelectric film in a four-layer composite resonator, which includes two electrodes. In this formula, the coupling coefficient can be calculated from the distribution of the effective coupling coefficients, k2eff...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/s0041-624x(99)00172-9
更新日期：2000-03-01 00:00:00
abstract：:In cancellous bone, longitudinal waves often separate into fast and slow waves depending on the alignment of bone trabeculae in the propagation path. This interesting phenomenon becomes an effective tool for the diagnosis of osteoporosis because wave propagation behavior depends on the bone structure. Since the fast w...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2008.04.011
更新日期：2008-11-01 00:00:00
abstract：:This paper introduces a new beamformer, which combines the eigenspace based minimum variance (ESBMV) beamformer with a subarray coherence based postfilter (SCBP), for improving the quality of ultrasound plane-wave imaging. The ESBMV beamformer has been validated in improving the imaging contrast, but the difficulty in...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2015.10.026
更新日期：2016-02-01 00:00:00
abstract：:Predominant physical phenomenon in highly scattering materials is the attenuation due to dispersion. Therefore, received echo has high frequencies more severely attenuated than low frequencies and the structural noise can be modeled as a non-stationary random process. Most of the proposed techniques for enhancing the ...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2006.05.174
更新日期：2006-12-22 00:00:00
abstract：:The paper presents an equivalent circuit model of the polymer coated surface acoustic wave (SAW) resonators by combining coupling-of-mode (COM) description of SAW resonators and perturbation calculation of SAW propagation under polymer loading. An expression for the motional load produced by polymer coating is deduced...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2010.12.006
更新日期：2011-07-01 00:00:00
abstract：BACKGROUND AND MOTIVATION:Previous works investigating the radiation force of diverging spherical progressive waves incident upon spherical particles have demonstrated the direction of reversal of the force when the particle is subjected to a curved wave-front. In this communication, the analysis is extended to the cas...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2010.12.004
更新日期：2011-07-01 00:00:00
abstract：:High-frequency calibration of hydrophones is becoming increasingly important, both for clinical and scientific applications of ultrasound, and user safety. At present, the calibrations available routinely to the user community extend to 60 MHz. However, hydrophones that can measure beyond this are available, and ultra...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2020.106218
更新日期：2020-12-01 00:00:00
abstract：:In this paper a high intensity focused ultrasound (FUS) phantom model was developed, in order to be used in experiments for Blood Brain Barrier (BBB) disruption. The target was to create a phantom model that represents the disruption of the BBB during ultrasound application. An appropriate experimental setup was creat...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2020.106244
更新日期：2021-02-01 00:00:00
abstract：:The objective was to use multiple paths through the slurry to determine the lowest concentration that provided accurate attenuation measurements and to measure the velocity of sound through an effective long path. Ultrasonic attenuation measurements were obtained for slurries of silica (10 microm diameter) in water fo...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2006.05.024
更新日期：2006-12-22 00:00:00
abstract：:In this paper, dispersive behavior and band structure of SH waves in magnetic-electric (ME) periodically layered plate are investigated by the transfer matrix method. Two kinds of unit cell form, one is piezoelectric (PE)/piezomagnetic (PM)/PE, and the other is PM/PE/PM, are considered in detailed. A peculiar case of ...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2014.01.015
更新日期：2014-07-01 00:00:00
abstract：:We study thickness-shear vibration of a quartz plate connected to two piezoelectric ceramic plates with initial deformations caused by a biasing electric field. The theory for small deformations superposed on finite biasing deformations in an electroelastic body is used. It is shown that the resonant frequencies of th...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2010.07.002
更新日期：2011-02-01 00:00:00
abstract：:The electromagnetic acoustic transducers (EMATs) with a meander-line coil possess the capability of generating Lamb waves carrying multiple wavelengths, and the characteristics of multiple wavelengths is analyzed by developing a spatial transversal filter model for the EMAT. It is shown that the characteristics is due...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2013.09.003
更新日期：2014-02-01 00:00:00
abstract：:In this paper, the radial basis function (RBF) collocation method based on the nonlocal Eringen piezoelectricity theory is developed to compute the band structures of nanoscale multilayered piezoelectric phononic crystals taking account of nonlocal interface effects. Detailed calculations are performed for anti-plane ...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2016.09.009
更新日期：2017-01-01 00:00:00
abstract：:During the last decade, the introduction of ultrasound techniques in arc welding with the intention of improving the operational performance and technical characteristics of the welding processes have been studied intensively. In this work is presented a broad review of the literature surrounding the utilization of th...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2014.10.007
更新日期：2015-02-01 00:00:00
abstract：:The linear wave equation in a lossless medium is time reversible, i.e., every solution p(x, t) has a temporal mirror solution p(x, -t). Analysis shows that time reversal also holds for the lossless nonlinear wave equation. In both cases, time-reversal invariance is violated when losses are present. For nonlinear propa...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/s0041-624x(00)00020-2
更新日期：2000-09-01 00:00:00
abstract：:Conventionally, the ultrasonic polar scan (UPS) records the amplitude or time-of-flight in transmission using short ultrasonic pulses for a wide range of incidence angles, resulting in a fingerprint of the critical bulk wave angles of the material at the insonified spot. Here, we investigate the use of quasi-harmonic ...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2015.01.002
更新日期：2015-04-01 00:00:00
