Improving efficiency of ultrasound histotripsy sources by transmitting at the second harmonic frequency.
Therapeutic ultrasound has shown potential for improving many aspects of medical care in recent years. Therapeutic ultrasound often involves high pressures or intensities, but pressures and intensitie...
Therapeutic ultrasound has shown potential for improving many aspects of medical care in recent years. Therapeutic ultrasound often involves high pressures or intensities, but pressures and intensitie...
Cavitation bubble activity during treatment of cortical bones by shock waves.
Shock wave (SW) induced cavitation might be a physical effect by which bioeffects on bones are mediated, especially for SW treatment of bone nonunion. To assess the presence of cavitation and to study...
Shock wave (SW) induced cavitation might be a physical effect by which bioeffects on bones are mediated, especially for SW treatment of bone nonunion. To assess the presence of cavitation and to study...
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Skull flexure from blast waves: A mechanism for brain injury with implications for helmet design. (A)
J. Acoust. Soc. Am. Volume 125, Issue 4, pp. 2650-2650 (April 2009)
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Traumatic brain injury [TBI] has become a signature injury of current military conflicts. The debilitating effects of TBI are long-lasting and costly. Although the mechanisms by which impacts cause TBI have been well researched, the mechanisms by which blasts cause TBI are not understood. Various possibilities have been investigated, but blast-induced deformation of the skull has been neglected. From numerical hydrodynamic simulations, we have discovered that nonlethal blasts can induce sufficient flexure of the skull to generate potentially damaging loads in the brain, even if no impact occurs. The possibility that this mechanism may contribute to TBI has implications for the diagnosis of soldiers and the design of protective equipment such as helmets. [This work performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344].
©2009 Acoustical Society of America
©2009 Acoustical Society of America
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