Method and apparatus for filling doppler signal gaps in ultrasound diagnostic imaging
First Claim
1. A method for filling Doppler signal gaps produced by switching between two or more imaging modes in ultrasound diagnostic imaging, wherein a Doppler signal is not acquired during a gap, comprising the steps of:
- storing a Doppler signals before and after the gap;
reading the Doppler signals before and after the gap as Doppler signals to be filled and analyzing spectral characteristics of the Doppler signals to be filled to obtain spectral parameters;
judging whether the Doppler signals to be filled are to be frequency compensated according to the spectral parameters;
frequency compensating the Doppler signals to be filled according to the spectral parameters, wherein the frequency compensated Doppler signals are frequency modulated to shift mean frequencies of the Doppler signals to be filled;
filling the gap by weighting and superposing the frequency compensated Doppler signals to be filled and the original Doppler signals before and after the gap if the Doppler signals to be filled meet a frequency compensation condition, or filling the gap by weighting and superposing the Doppler signals to be filled and the original Doppler signals before and after the gap directly if the Doppler signals to be filled do not meet the frequency compensation condition; and
displaying the resulting image of the resulting signals via a digital scan converter.
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Abstract
The present invention provides a method and apparatus for filling Doppler signal gaps. The method comprises steps of: storing Doppler signals before and after a gap; analyzing spectral characteristics of the Doppler signals to be filled; judging whether the Doppler signals are to be frequency compensated according to the spectral parameters; compensating the Doppler signals; and filling the gap by means of weighting and superposing the frequency compensated Doppler signals to be filled and the original Doppler signals before and after the gap based on the judging result. According to the method of the present invention, the Doppler signals before and after the gap are first subjected to frequency compensation, and then weighted and superposed with the acquired Doppler signals, thus obtaining a continuous spectrogram and audio output and maintaining the original spectral characteristics of the Doppler signal.
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Citations
21 Claims
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1. A method for filling Doppler signal gaps produced by switching between two or more imaging modes in ultrasound diagnostic imaging, wherein a Doppler signal is not acquired during a gap, comprising the steps of:
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storing a Doppler signals before and after the gap; reading the Doppler signals before and after the gap as Doppler signals to be filled and analyzing spectral characteristics of the Doppler signals to be filled to obtain spectral parameters; judging whether the Doppler signals to be filled are to be frequency compensated according to the spectral parameters; frequency compensating the Doppler signals to be filled according to the spectral parameters, wherein the frequency compensated Doppler signals are frequency modulated to shift mean frequencies of the Doppler signals to be filled; filling the gap by weighting and superposing the frequency compensated Doppler signals to be filled and the original Doppler signals before and after the gap if the Doppler signals to be filled meet a frequency compensation condition, or filling the gap by weighting and superposing the Doppler signals to be filled and the original Doppler signals before and after the gap directly if the Doppler signals to be filled do not meet the frequency compensation condition; and displaying the resulting image of the resulting signals via a digital scan converter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. An apparatus for filling Doppler signal gaps produced by switching between two or more imaging modes in ultrasound diagnostic imaging, wherein a Doppler signal is not acquired during a gap, the apparatus comprising the following modules:
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a storage module for storing Doppler signals before and after the gap; an analysis module for reading the Doppler signals before and after the gap as Doppler signals to be filled and analyzing spectral characteristics of the Doppler signals to be filled to obtain spectral parameters of the signals; a judgement module for judging whether the Doppler signals to be filled are to be frequency compensated according to the spectral parameters; a compensation module for frequency compensating the Doppler signals to be filled according to the spectral parameters, wherein the frequency compensated Doppler signals are frequency modulated to shift mean frequencies of the Doppler signals to be filled; and a filling module for filling the gap by weighting and superposing the frequency compensated Doppler signals to be filled and the original Doppler signals before and after the gap if the Doppler signals to be filled meet a frequency compensation condition, or filling the gap by weighting and superposing the Doppler signals to be filled and the original Doppler signals before and after the gap directly if the Doppler signals to be filled do not meet the frequency compensation condition. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21)
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Specification