Download e-book for iPad: Advances in Echo Imaging Using Contrast Enhancement by Pravin M. Shah (auth.), Navin C. Nanda MD, Reinhard Schlief

By Pravin M. Shah (auth.), Navin C. Nanda MD, Reinhard Schlief (eds.)

ISBN-10: 9401581266

ISBN-13: 9789401581264

ISBN-10: 9401581282

ISBN-13: 9789401581288

` Nanda and Schlief have edited and produced an authoritative and up to date reference ebook for either skilled and green echocardiologists. I strongly suggest this ebook to these attracted to this box. '
International magazine of Cardiology, forty five (1994)

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By Pravin M. Shah (auth.), Navin C. Nanda MD, Reinhard Schlief (eds.)

ISBN-10: 9401581266

ISBN-13: 9789401581264

ISBN-10: 9401581282

ISBN-13: 9789401581288

` Nanda and Schlief have edited and produced an authoritative and up to date reference ebook for either skilled and green echocardiologists. I strongly suggest this ebook to these attracted to this box. '
International magazine of Cardiology, forty five (1994)

Show description

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Additional info for Advances in Echo Imaging Using Contrast Enhancement

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Shapiro JR, Reisner SA, Lichtenberg GS, Meltzer RS. Intravenous contrast echocardiography with use of sonicated albumen in humans: systolic disappearance of left ventricular contrast after transpulmonary transmission. J Am Col CardioI1990;6:1607-17. 15. Sigel B, Coelho JCU, Spigos DG et al. Ultrasonography of blood during stasis and coagulation. Invest Radiol 1981;16:71-6. 16. Sigel B, Machi J, Beitler JC et al. Variable ultrasound echogenicity in flowing blood. Science 1982;218: 1321-3. Principles of echo contrast 41 17.

Figure 5. Radius-time relation of carbon dioxide bubbles in degassed plasma. Yang's experimental studies [33,34] were performed in stationary and moving liquid settings. The blood and plasma were both degassed. Data were obtained on relatively larger bubbles (of interest in relation to gas embolism in blood). Radius-time relations for CO 2 bubbles in plasma are shown in Figure 5, which indicates some initial chemical reactions forming of carbonic acid but is followed by diffusion controlled shrinkage of the bubble.

The expansion may be by diffusion of dissolved gases from the liquid into the bubble, or by pressure reduction, or by temperature increase. If, however, the bubbles contain mainly water vapor, reducing the ambient pressure sufficiently at essentially constant temperature may cause an explosive vaporization into the cavities, which is part of the phenomenon called cavitation [36]. High intensity sonication may produce acoustic cavitation when sound waves travel through a liquid and cause large pressure variations, with negative pressures favoring bubble growth and positive pressures accelerating bubble decay.

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Advances in Echo Imaging Using Contrast Enhancement by Pravin M. Shah (auth.), Navin C. Nanda MD, Reinhard Schlief (eds.)


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