Lecture 1 Notes

5 mouse embryos time phoon et al circ res 2004

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Unformatted text preview: d microbubbles Microbubbles targeted to vascular endothelial cells in E11.5 mouse embryos Time Phoon et al, Circ Res, 2004 Bartelle et al, Circ Res, 2012 Longitudinal Wave Acoustic Waves       Pressure waves that propagate through matter via compression and expansion of the material –  Generated by compressing and releasing a small volume of tissue Longitudinal wave –  Particles in the medium move back and force in the same direction that the wave is traveling Shear Wave –  Particles move at right angles to the direction of the wave –  Not used for medical ultrasound imaging EM vs Acoustic Waves   Electromagnetic –  Self propagating, consisting of electric and magnetic components oscillating at right angles to each other, and to propagation direction –  Does not require a material medium through which to propagate –  Classification (increasing in frequency, decreasing in wavelength): »  radio, microwave, infrared, visible light, ultraviolet, x-ray, gamma ray Transfer / Transformation of Energy   Light becomes sound — photoacoustic phenomena   Sound becomes light — sonoluminescence     Acoustic –  Pressure waves that propagate through matter via compression and expansion of the material –  Requires a material medium through which to propagate –  Classification (increasing in frequency, decreasing in wavelength): »  Infra sound, audible sound, ultrasound   Absorbed electromagnetic (EM) and acoustic energy both become heat Nevertheless, EM and acoustic energy are FUNDAMENTALLY DISTINCT PHENOMENA! Acoustic Wave Energy Ranges Infrasound Audible 20 Hz     Pulse-Echo Ultrasound Imaging Ultrasound...
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This document was uploaded on 03/12/2014 for the course EL 5823 at NYU Poly.

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