Journal ArticleDOI
Internal displacement and strain imaging using ultrasonic speckle tracking
TLDR
In this paper, the authors extended the ultrasound speckle tracking method to allow measurement of internal displacement and strain fields over a wide dynamic range of tissue motion, which should lead to enhanced contrast resolution in strain and elasticity images.Abstract:
Previous ultrasound speckle tracking methods have been extended, permitting measurement of internal displacement and strain fields over a wide dynamic range of tissue motion. The markedly increased dynamic range of this approach should lead to enhanced contrast resolution in strain and elasticity images. Results of experiments on gelatin-based, tissue equivalent phantoms show the capabilities of the method. >read more
Citations
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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).
Journal ArticleDOI
Elastography: ultrasonic estimation and imaging of the elastic properties of tissues.
Jonathan Ophir,S.K. Alam,Brian S. Garra,Faouzi Kallel,Elisa E. Konofagou,Thomas A. Krouskop,Tomy Varghese +6 more
TL;DR: The strain filter formalism and its utility in understanding the noise performance of the elastographic process is given, as well as its use for various image improvements.
Journal ArticleDOI
On the feasibility of remote palpation using acoustic radiation force.
TL;DR: The feasibility ofRemote palpation is demonstrated experimentally using breast tissue phantoms with spherical lesion inclusions, and in vitro liver samples and the results show promise for the clinical implementation of remote palpation.
References
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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
“Sonoelasticity” images derived from ultrasound signals in mechanically vibrated tissues
TL;DR: Preliminary experiments indicate that these novel images may be useful for detecting hard tumors in the prostate, liver, breast, and other organs.
Journal ArticleDOI
Tissue response to mechanical vibrations for “sonoelasticity imaging”
TL;DR: Preliminary results support the postulate that sonoelasticity imaging can provide useful information concerning tissue properties that are not otherwise obtainable.
Journal ArticleDOI
Ultrasonic imaging of internal vibration of soft tissue under forced vibration
Y. Yamakoshi,J. Sato,T. Sato +2 more
TL;DR: 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.
Journal ArticleDOI
Angle Independent Ultrasonic Detection of Blood Flow
TL;DR: A new technique for blood velocity imaging based on tracking the motion of the speckle pattern produced by blood, which unlike Doppler velocity determinations, these are angle independent.