• Publications
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Magnetic resonance elastography by direct visualization of propagating acoustic strain waves.
A nuclear magnetic resonance imaging (MRI) method is presented for quantitatively mapping the physical response of a material to harmonic mechanical excitation. The resulting images allow calculationExpand
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Sonication of removed hip and knee prostheses for diagnosis of infection.
BACKGROUND Culturing of samples of periprosthetic tissue is the standard method used for the microbiologic diagnosis of prosthetic-joint infection, but this method is neither sensitive nor specific.Expand
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  • PDF
Magnetic resonance elastography: Non-invasive mapping of tissue elasticity
Magnetic resonance elastography (MRE) is a phase-contrast-based MRI imaging technique that can directly visualize and quantitatively measure propagating acoustic strain waves in tissue-like materials subjected to harmonic mechanical excitation. Expand
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Nondiffracting X waves-exact solutions to free-space scalar wave equation and their finite aperture realizations
  • J. Lu, J. Greenleaf
  • Physics, Medicine
  • IEEE Transactions on Ultrasonics, Ferroelectrics…
  • 1992
The authors report families of generalized nondiffracting solutions of the free-space scalar wave equation, and specifically, a subset of these nondiffracting solutions, which are called X waves.Expand
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Shearwave dispersion ultrasound vibrometry (SDUV) for measuring tissue elasticity and viscosity
Characterization of tissue elasticity (stiffness) and viscosity has important medical applications because these properties are closely related to pathological changes. Quantitative measurement isExpand
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Ultrasound-stimulated vibro-acoustic spectrography.
An ultrasound method based on radiation force is presented for imaging the acoustic response of a material to mechanical excitation. Acoustic energy was emitted from solids and tissues in response toExpand
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Selected methods for imaging elastic properties of biological tissues.
For millennia, physicians have used palpation as a part of the physical examination to detect pathology. The ubiquitous presence of "stiffer" tissue associated with pathology often represents anExpand
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Tissue characterization using magnetic resonance elastography: preliminary results.
The well-documented effectiveness of palpation as a diagnostic technique for detecting cancer and other diseases has provided motivation for developing imaging techniques for noninvasively evaluatingExpand
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Quantifying elasticity and viscosity from measurement of shear wave speed dispersion.
The propagation speed of shear waves is related to frequency and the complex stiffness (shear elasticity and viscosity) of the medium. A method is presented to solve for shear elasticity andExpand
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Use of gray value distribution of run lengths for texture analysis
We propose to use the gray value distribution of the runs to define two new features, viz., low gray level run emphasis ( LGRE ) and high gray levelrun emphasis ( HGRE ). Expand
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