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Color doppler ultrasonic diagnosis apparatus

A technology of color Doppler and diagnostic equipment, which is applied in the field of color Doppler ultrasonic diagnostic equipment, can solve the problem of not mentioning the separation of clutter components, and achieve the effect of suppressing clutter components

Active Publication Date: 2011-06-22
TOSHIBA MEDICAL SYST CORP
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Problems solved by technology

However, there is no mention of the separation of clutter components from bloodstream components

Method used

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no. 2 approach

[0064] The structure of this embodiment is the same as that of the first embodiment. Figure 7 The procedure of the two-dimensional filter processing of this embodiment is shown. Until the inverse transformation (S1 to S4) of the second orthogonal transformation is performed, it is the same as in the first embodiment.

[0065] After the inverse transform of the second orthogonal transform is performed, the inverse transform of the first orthogonal transform is not performed. Maintaining the state on the first frequency axis, estimate the speed, variance, and power in each frequency component (S21, S22, S23). The velocity, variance, and power are parameters on the Doppler frequency axis, so they can be estimated by the same processing as in the first embodiment.

[0066] Here, let the first orthogonal transform be a discrete Fourier transform. In addition, the second orthogonal transform method is not limited, and any orthogonal transform method may be used. When the Fourier freq...

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Abstract

The invention relates to a color Doppler ultrasonic diagnosis apparatus, aims to solve the problem that: when transmitting / receiving broadband ultrasonic wave, the Doppler band of the clutter components and the Doppler band of the blood flow component spread and overlap with each other, it is difficult to separate the clutter components from the blood flow component, and the obtained blood flow image is mixed with a lot of clutter components.The color Doppler ultrasonic diagnosis apparatus includes an ultrasonic probe, a transmission / reception unit configured to transmit ultrasonic wave to or receive ultrasonic wave from a detected body by the ultrasonic probe, a quadrature phase detection unit configured to perform quadrature phase detection of an output from the transmission / reception unit, a filter unit configured to perform first orthogonal transformation for an output from the quadrature phase detection unit in a depth direction, perform second orthogonal transformation for a result obtained by the first orthogonal transformation in an ensemble direction, apply a two-dimensional filter to obtained frequency data to extract a blood flow component from the frequency data, and sequentially perform inverse transformation of the second orthogonal transformation and inverse transformation of the first orthogonal transformation for an output from the two-dimensional filter, and a blood flow component information calculation unit configured to calculate blood flow component information based on an output from the filter unit.

Description

[0001] This application is based on the patent application No. 2009-289634 filed in Japan on December 21, 2009, and claims the priority of the earlier application, and all of its contents are incorporated into this application. Technical field [0002] The invention relates to a color Doppler ultrasonic diagnostic device. Background technique [0003] The color Doppler method in ultrasound diagnosis is to irradiate a living body with ultrasound multiple times in the same direction, and extract blood flow component information by shifting the frequency based on the Doppler effect. The blood flow component information includes blood flow speed, power, and variance. For example, such as Picture 11 As shown, ultrasonic waves are irradiated N times in the same direction (same grating) with a period of 1 / PRF (PRF: repetition frequency). A data sequence in which N echo components corresponding to the same depth are arranged along the time axis in the same direction is called the ensembl...

Claims

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Application Information

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IPC IPC(8): A61B8/06
CPCA61B8/13A61B8/0891A61B8/06A61B8/488A61B8/5238A61B8/08
Inventor 佐藤武史
Owner TOSHIBA MEDICAL SYST CORP
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