Diagnostic ultrasound imaging based on rate subtraction imaging (RSI)
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United States of America Patent
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Jan 6, 2004
Grant Date -
Mar 7, 2002
app pub date -
Jan 31, 2001
filing date -
Jan 31, 2000
priority date (Note) -
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Abstract
In a diagnostic ultrasound apparatus, an ultrasound pulse signal is transmitted two times in each of the rasters on a region to be scanned. Subtraction between echo signals received at each time of transmission is made to obtain a difference signal. Either one of the echo signals and the difference signal are produced into individual tomographic images, independently of each other. The produced individual tomographic images are displayed with a superposed manner one on the other or parallel-arranged manner. This allows contrast echo imaging to be conducted on a rate subtraction imaging technique. Minute blood flows are depicted distinguishably from tissue surrounding those flows in a steady manner.
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