منابع مشابه
Collapse Dynamics of Ultrasound Contrast Agent
Ultrasound contrast agents (UCAs) are micron-sized gas bubbles encapsulated with thin shells on the order of nanometers thick. The damping effects of these viscoelastic coatings are widely known to significantly alter the bubble dynamics for linear and low-amplitude behavior; however, their effects on strongly nonlinear and destruction responses are much less studied. This dissertation examines...
متن کاملUltrasound-induced Coalescence of Contrast Agent Microbubbles
ULTRASOUND-INDUCED COALESCENCE OF CONTRAST AGENT MICROBUBBLES M. POSTEMA*1,2, C. T. LANCÉE1, N. DE JONG1,3, P. MARMOTTANT3, and S. HILGENFELDT3, 1Dept. of Experimental Echocardiography, Thoraxcentre, Erasmus MC, 2Interuniversity Cardiology Institute of The Netherlands, 3Physics of Fluids, Dept. of Applied Physics, Faculty of Science and Technology, University of Twente. Corresponding e-mail: po...
متن کاملEffects of ultrasound and ultrasound contrast agent on vascular tissue
BACKGROUND Ultrasound (US) imaging can be enhanced using gas-filled microbubble contrast agents. Strong echo signals are induced at the tissue-gas interface following microbubble collapse. Applications include assessment of ventricular function and virtual histology. AIM While ultrasound and US contrast agents are widely used, their impact on the physiological response of vascular tissue to v...
متن کاملSubharmonic behavior of phospholipid-coated ultrasound contrast agent microbubbles.
Coated microbubbles, unlike tissue are able to scatter sound subharmonically. Therefore, the subharmonic behavior of coated microbubbles can be used to enhance the contrast in ultrasound contrast imaging. Theoretically, a threshold amplitude of the driving pressure can be calculated above which subharmonic oscillations of microbubbles are initiated. Interestingly, earlier experimental studies o...
متن کاملThe angiogenic response is dependent on ultrasound contrast agent concentration
OBJECTIVE Ultrasound (US) and ultrasound contrast agents (UCAs) provide a way to noninvasively induce targeted angiogenesis. However, there exists a lack of understanding regarding the mechanisms of this process that has impeded progress. This study sought to characterize the angiogenic response, by both exploring the role of UCA concentration ([UCA]) in bioeffect induction at 0 days post expos...
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ژورنال
عنوان ژورنال: JACC: Cardiovascular Imaging
سال: 2009
ISSN: 1936-878X
DOI: 10.1016/j.jcmg.2009.05.008