By Pravin M. Shah (auth.), Navin C. Nanda MD, Reinhard Schlief (eds.)
` Nanda and Schlief have edited and produced an authoritative and updated reference e-book 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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Extra info for Advances in Echo Imaging Using Contrast Enhancement
The conclusion was that gaseous bubble size measurement could be applied for pressure sensing. Table 1 lists gas properties. Figure 8 illustrates, for air in water, the inverse relationship found between instantaneous-to-original bubble radius ratio and instantaneous-to-initial ambient pressure ratio. A linear correlation was obtained when data were plotted on a logarithmic scale. 4. Variations in pressure wave forms and durations did not Principles of echo contrast 27 2 I (a) \ 'd. R R, *" III .
This radiographic contrast agent has been used in myocardial perfusion imaging largely because it is already approved for intracoronary injection and is commonly used in cardiac catheterization laboratories. The method to sonicate Renograffin-76® used in most studies is as follows [39, 40]: a plastic syringe barrel is held vertically with its hub occluded and facing down. It is partly filled with Renograffin-76® and placed beneath the sonicator horn. After the energy is turned on, manual movements of the syringe are used to bring the horn in contact with the surface in order to create surface agitation.
Schlie! ), Advances in Echo Imaging Using Contrast Enhancement, 43-56. Kluwer Academic Publishers. © 1993 44 Gian Paolo Bezante et al. 2. THE SOURCE OF ULTRASONIC CONTRAST EFFECT During the late 1960s and early 1970s the ultrasound contrast effect was noted in different and unrelated solutions. A mechanical explanation was suggested: air microbubbles produced at the catheter tip by cavitation or caused by a small amount of gas trapped at junctions within the injecting apparatus were the proposed mechanism [10-12].
Advances in Echo Imaging Using Contrast Enhancement by Pravin M. Shah (auth.), Navin C. Nanda MD, Reinhard Schlief (eds.)