Ultrasonic diagnostic image flash suppression technique
First Claim
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1. A diagnostic ultrasonic imaging system comprising:
- means for receiving Doppler signals which may be contaminated with signal or image artifacts;
means for filtering said Doppler signals with a min-max filter to remove signal or image artifacts; and
a Doppler processor for processing said filtered Doppler signals.
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Abstract
A flash suppresser for a diagnostic ultrasonic imaging system which processes Doppler signals is provided which eliminates flash artifacts by means of a min-max filter.
78 Citations
22 Claims
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1. A diagnostic ultrasonic imaging system comprising:
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means for receiving Doppler signals which may be contaminated with signal or image artifacts; means for filtering said Doppler signals with a min-max filter to remove signal or image artifacts; and a Doppler processor for processing said filtered Doppler signals. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. In a hand held ultrasound instrument including a transducer for transmitting ultrasonic energy into the body and receiving echo signals from said transmission, a signal processor comprising:
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a motion signal circuit, responsive to said received echo signals for producing a sequence of signals representing motion of substances within the body, wherein said motion signal circuit includes a min-max filter for eliminating unwanted signals from said motion signal sequence. - View Dependent Claims (10, 11)
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12. A method for eliminating an unwanted signal from a sequence of spatially corresponding Doppler signals Fn, Fn-1, and Fn-2 comprising:
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comparing adjacent Doppler signals to find two minimum values Min1 (Fn,Fn-1) and Min2 (Fn-1,Fn-2); identifying the maximum value of said two minimum values; and using said identified maximum value to eliminate said unwanted signal. - View Dependent Claims (13, 14, 15)
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16. A diagnostic ultrasonic imaging system comprising:
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means for receiving Doppler signals which may be contaminated with signal or image artifacts; means for filtering said Doppler signals with a max-min filter to remove signal or image artifacts; and a Doppler processor for processing said filtered Doppler signals. - View Dependent Claims (17, 18, 19)
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20. A diagnostic ultrasonic imaging system comprising:
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means for receiving ultrasound signals which may be contaminated with signal or image artifacts; means for filtering said ultrasound signals with a min-max filter to remove signal or image artifacts; and means for filtering said ultrasound signals with a max-min filter to remove signal or image artifacts. - View Dependent Claims (21, 22)
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Specification