Contrast Imaging (Toshiba PowerVision 8000 and Aplio)
Remarkable progress has been made in contrast-enhanced ultrasonography (US) over the last 10 years since research began on harmonic imaging based on the nonlinear phenomenon of microbubbles following the development of intravenously administered ultrasonic contrast agents.1 At present, ten types of ultrasonic contrast agents are in development and various combinations of contrast agent and imaging technique are now being studied to determine which of them provides the most useful diagnostic findings. This chapter describes the optimal contrast mode of the PowerVision series for contrast imaging, mainly using Levovist. The features of next-generation contrast agents are also described with regard to both engineering and clinical practice.
KeywordsContrast Agent Mechanical Index High Frame Rate Transmission Interval Blood Flow Signal
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