Journal ArticleDOI
Ultrasonic imaging of internal vibration of soft tissue under forced vibration
Y. Yamakoshi,J. Sato,T. Sato +2 more
TLDR
An imaging system that can display both the amplitude and phase maps of internal vibration in soft tissues for forced low-frequency vibration is described, and the velocities of vibration are measured for some samples as well as in vivo.Abstract:
An imaging system that can display both the amplitude and phase maps of internal vibration in soft tissues for forced low-frequency vibration is described. In this method, low-frequency sinusoidal vibration of frequency under several hundred hertz is applied from the surface of the sample and the resulting movement in it is measured from the Doppler frequency shift of the simultaneously transmitted probe ultrasonic waves. Basic experiments are carried out by using 3.0-MHz ultrasonic waves. The two-dimensional maps of the amplitude and phase of internal vibration are shown, and the velocities of vibration are measured for some samples as well as in vivo. >read more
Citations
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Journal ArticleDOI
Elastography: A Quantitative Method for Imaging the Elasticity of Biological Tissues
TL;DR: Initial results of several phantom and excised animal tissue experiments are reported which demonstrate the ability of this technique to quantitatively image strain and elastic modulus distributions with good resolution, sensitivity and with diminished speckle.
Journal ArticleDOI
Transient elastography: a new noninvasive method for assessment of hepatic fibrosis
Laurent Sandrin,Bertrand Fourquet,Jean-Michel Hasquenoph,Sylvain Yon,Céline Fournier,F. Mal,Christos Christidis,Marianne Ziol,Bruno Poulet,Farad Kazemi,Michel Beaugrand,Robert Palau +11 more
TL;DR: Liver elasticity measurements were reproducible, operator-independent and well correlated and the intra- and interoperator reproducibility of the technique, as well as its ability to quantify liver fibrosis, were evaluated in 106 patients with chronic hepatitis C.
Journal ArticleDOI
Shear wave elasticity imaging: a new ultrasonic technology of medical diagnostics
TL;DR: A physical and mathematical basis of SWEI is presented and some experimental results of pilot studies proving feasibility of this new ultrasonic technology are presented, including a theoretical model of shear oscillations in soft biological tissue remotely induced by the radiation force of focused ultrasound.
Journal ArticleDOI
Acoustic radiation force impulse imaging: in vivo demonstration of clinical feasibility.
TL;DR: Experimental results are presented demonstrating that displacements on the order of 10 microm can be generated and detected in soft tissues in vivo using a single transducer on a modified diagnostic US scanner and support the clinical feasibility of a radiation force-based remote palpation imaging system.
Journal ArticleDOI
Magnetic resonance elastography: Non-invasive mapping of tissue elasticity
Armando Manduca,Travis E. Oliphant,M. A. Dresner,J. L. Mahowald,Scott A. Kruse,E. Amromin,Joel P. Felmlee,James F. Greenleaf,Richard L. Ehman +8 more
TL;DR: Magnetic resonance elastography shows promise as a potential technique for 'palpation by imaging', with possible applications in tumor detection, characterization of disease, and assessment of rehabilitation (particularly in muscle).
References
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Book
Shock and vibration handbook
TL;DR: The third edition of the Handbook as discussed by the authors provides a wealth of detailed information on all aspects of shock and vibration, including instrumentation and measurements, data analysis and testing, methods of control, solutions to engineering problems and effects of vibration on people.
Journal Article
A pulsed Doppler ultrasonic system for making noninvasive measurements of the mechanical properties of soft tissue.
TL;DR: In response to the need for a more precise means of predicting the interaction of a prosthetic socket with an amputee's residual limb, a gated Doppler ultrasonic motion sensing system was devised for making noninvasive measurements of the elastic modulus of soft tissue in vivo.
Book ChapterDOI
Sono-Elasticity: Medical Elasticity Images Derived from Ultrasound Signals in Mechanically Vibrated Targets
TL;DR: The transrectal ultrasound experience from patients with palpable cancers, suggests a varied non-specific gray-scale appearance as well, despite the uniform impression that they are all firm on digital palpation.
Journal ArticleDOI
Field and Impedance of an Oscillating Sphere in a Viscoelastic Medium with an Application to Biophysics
TL;DR: In this article, a theoretical analysis of the behavior of mechanical vibrations in a medium with elastic, viscous, and relaxational properties is made for human muscle tissue by inserting the approximate values of its elastic constants into the general formulas.