Ultrasonic doppler diagnostic apparatus and measuring method of diagnostic parameter
First Claim
1. An ultrasonic Doppler diagnostic apparatus comprising:
- a Doppler signal detecting unit which detects a Doppler signal at a predetermined region from a reception signal obtained by performing ultrasonic wave transmission/reception with respect to an object to be examined;
a spectrum calculating unit which calculates a frequency spectrum of the Doppler signal;
a trace waveform generating unit which generates a trace waveform representing a temporal change in a predetermined spectrum component in the frequency spectrum;
a processing unit which generates data by extracting a trace waveform for each cardiac cycle from the generated trace waveform, and arraying said plurality of extracted trace waveforms along a first time axis representing a time direction associated with a heart rate and a second time axis representing a time direction within one cardiac cycle;
a statistical processing unit which generates a diagnostic waveform by performing statistical processing using the data;
a storage unit which stores a selection criterion;
a feature amount selecting unit which automatically selects a feature amount for the diagnostic waveform on the basis of the stored selection criterion;
a diagnostic parameter measuring unit which measures a diagnostic parameter on the basis of the feature amount; and
a display unit which displays a measurement result on the diagnostic parameter;
wherein the feature amount comprises an E wave and A wave of the trace waveform which are obtained in left ventricular blood inflow measurement; and
wherein the diagnostic parameter measuring unit measures at least one of an amplitude ratio E/A between E and A waves of a trace waveform of a maximum flow velocity and a lower limit period DCT of an E wave as the diagnostic parameter on the basis of the feature amount selected by the feature amount selecting unit.
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Accused Products
Abstract
A Doppler signal detecting unit 42 and spectrum calculating unit 44 measure a Doppler spectrum from a reception signal obtained by ultrasonic wave transmission/reception with respect to a diagnosis region of an object to be examined. A local maximum/minimum detecting unit 62 detects a plurality of local maximum/minimum pairs with respect to a trace waveform generated by a trace waveform generating unit 61 on the basis of the Doppler spectrum. A feature amount selecting unit 64 selects a desired waveform from a plurality of local maximum/minimum pairs in a predetermined cardiac cycle set by a cardiac cycle setting unit 63 by using heartbeat information from a living body measuring unit 9 on the basis of a preset selection criterion. A diagnostic parameter is measured on the basis of the position information or amplitude information of the selected waveform.
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Citations
30 Claims
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1. An ultrasonic Doppler diagnostic apparatus comprising:
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a Doppler signal detecting unit which detects a Doppler signal at a predetermined region from a reception signal obtained by performing ultrasonic wave transmission/reception with respect to an object to be examined; a spectrum calculating unit which calculates a frequency spectrum of the Doppler signal; a trace waveform generating unit which generates a trace waveform representing a temporal change in a predetermined spectrum component in the frequency spectrum; a processing unit which generates data by extracting a trace waveform for each cardiac cycle from the generated trace waveform, and arraying said plurality of extracted trace waveforms along a first time axis representing a time direction associated with a heart rate and a second time axis representing a time direction within one cardiac cycle; a statistical processing unit which generates a diagnostic waveform by performing statistical processing using the data; a storage unit which stores a selection criterion; a feature amount selecting unit which automatically selects a feature amount for the diagnostic waveform on the basis of the stored selection criterion; a diagnostic parameter measuring unit which measures a diagnostic parameter on the basis of the feature amount; and a display unit which displays a measurement result on the diagnostic parameter; wherein the feature amount comprises an E wave and A wave of the trace waveform which are obtained in left ventricular blood inflow measurement; and wherein the diagnostic parameter measuring unit measures at least one of an amplitude ratio E/A between E and A waves of a trace waveform of a maximum flow velocity and a lower limit period DCT of an E wave as the diagnostic parameter on the basis of the feature amount selected by the feature amount selecting unit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. An ultrasonic Doppler diagnostic apparatus, comprising:
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a Doppler signal detecting unit which detects a Doppler signal at a predetermined region from a reception signal obtained by performing ultrasonic wave transmission/reception with respect to an object to be examined; a spectrum calculating unit which calculates a frequency spectrum of the Doppler signal; a trace waveform generating unit which generates a trace waveform representing a temporal change in a predetermined spectrum component in the frequency spectrum; a processing unit which generates data by extracting a trace waveform for each cardiac cycle from the generated trace waveform, and arraying said plurality of extracted trace waveforms along a first time axis representing a time direction associated with a heart rate and a second time axis representing a time direction within one cardiac cycle; a statistical processing unit which generates a diagnostic waveform by performing statistical processing using the data; a storage unit which stores a selection criterion; a feature amount selecting unit which automatically selects a feature amount for the diagnostic waveform on the basis of the stored selection criterion; a diagnostic parameter measuring unit which measures a diagnostic parameter on the basis of the feature amount; and a display unit which displays a measurement result on the diagnostic parameter; wherein the feature amount comprises at least one of S, D, and AD waves of the trace waveform which are obtained in pulmonary artery blood flow measurement. - View Dependent Claims (17)
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18. An ultrasonic Doppler diagnostic apparatus comprising:
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a Doppler signal detecting unit which detects a Doppler signal at a predetermined region from a reception signal obtained by performing ultrasonic wave transmission/reception with respect to an object to be examined; a spectrum calculating unit which calculates a frequency spectrum of the Doppler signal; a trace waveform generating unit which generates a trace waveform representing a temporal change in a predetermined spectrum component in the frequency spectrum; a storage unit which stores a selection criterion; a feature amount selecting unit which automatically selects a feature amount with respect to the trace waveform in a predetermined cardiac cycle of the object on the basis of the stored selection criterion; a diagnostic parameter measuring unit which measures a diagnostic parameter on the basis of the feature amount; and a display unit which displays a measurement result on the diagnostic parameter; wherein the feature amount comprises an E wave and A wave of the trace waveform which are obtained in left ventricular blood inflow measurement; and wherein the diagnostic parameter measuring unit measures at least one of an amplitude ratio E/A between E and A waves of a trace waveform of a maximum flow velocity and a lower limit period DCT of an E wave as the diagnostic parameter on the basis of the feature amount selected by the feature amount selecting unit. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26)
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27. An ultrasonic Doppler diagnostic apparatus comprising:
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a Doppler signal detecting unit which detects a Doppler signal at a predetermined region from a reception signal obtained by performing ultrasonic wave transmission/reception with respect to an object to be examined; a spectrum calculating unit which calculates a frequency spectrum of the Doppler signal; a trace waveform generating unit which generates a trace waveform representing a temporal change in a predetermined spectrum component in the frequency spectrum; a storage unit which stores a selection criterion; a feature amount selecting unit which automatically selects a feature amount with respect to the trace waveform in a predetermined cardiac cycle of the object on the basis of the stored selection criterion; a diagnostic parameter measuring unit which measures a diagnostic parameter on the basis of the feature amount; and a display unit which displays a measurement result on the diagnostic parameter; wherein the feature amount comprises at least one of S, D, and AD waves of the trace waveform which are obtained in pulmonary artery blood flow measurement. - View Dependent Claims (28)
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29. A measuring method of diagnostic parameter comprising:
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detecting a Doppler signal at a predetermined region from a reception signal obtained by performing ultrasonic wave transmission/reception with respect to an object to be examined; calculating a frequency spectrum of the Doppler signal; generating a trace waveform representing a temporal change in a predetermined spectrum component in the frequency spectrum; generating data by extracting a trace waveform for each cardiac cycle from the generated trace waveform, and arraying said plurality of extracted trace waveforms along a first time axis representing a time direction associated with a heart rate and a second time axis representing a time direction within one cardiac cycle; generating a diagnostic waveform by performing statistical processing using the data; automatically selecting a feature amount with respect to the diagnostic waveform on the basis of a stored selection criterion; measuring a diagnostic parameter on the basis of the feature amount; and displaying a measurement result on the diagnostic parameter; wherein the feature amount comprises an E wave and A wave of the trace waveform which are obtained in left ventricular blood inflow measurement; and wherein the measuring a diagnostic parameter measures at least one of an amplitude ratio E/A between E and A waves of a trace waveform of a maximum flow velocity and a lower limit period DCT of an E wave as the diagnostic parameter on the basis of the automatically selecting a feature amount.
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30. A measuring method of diagnostic parameter comprising:
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detecting a Doppler signal at a predetermined region from a reception signal obtained by performing ultrasonic wave transmission/reception with respect to an object to be examined; calculating a frequency spectrum of the Doppler signal; generating a trace waveform representing a temporal change in a predetermined spectrum component in the frequency spectrum; automatically selecting a feature amount with respect to the trace waveform in a predetermined cardiac cycle of the object on the basis of a stored selection criterion; measuring a diagnostic parameter on the basis of the feature amount; and displaying a measurement result on the diagnostic parameter; wherein the feature amount comprises an E wave and A wave of the trace waveform which are obtained in left ventricular blood inflow measurement; and wherein the measuring a diagnostic parameter measures at least one of an amplitude ratio E/A between E and A waves of a trace waveform of a maximum flow velocity and a lower limit period DCT of an E wave as the diagnostic parameter on the basis of the automatically selecting a feature amount.
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Specification