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Method and apparatus for realizing Doppler scan conversion

A transformation device and Doppler line technology, applied in the field of Doppler scan transformation implementation and device, can solve problems such as the limitation of the number of envelopes, and achieve the effects of low cost, improved implementation and flexibility, and reduced system efficiency

Active Publication Date: 2009-06-24
SHENZHEN MINDRAY BIO MEDICAL ELECTRONICS CO LTD +1
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

In this implementation method of storing envelope waveforms in the FPGA chip, due to the limitation of the limited storage resources in the FPGA chip, it is generally impossible to save a large number of envelopes, so the number of envelopes that can be displayed is greatly limited. big limit

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  • Method and apparatus for realizing Doppler scan conversion
  • Method and apparatus for realizing Doppler scan conversion
  • Method and apparatus for realizing Doppler scan conversion

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Embodiment Construction

[0027] Figure 4 Shown is a block diagram of the realization of Doppler image scan conversion according to the present invention.

[0028] Since each envelope of each line of the Doppler image has only one point, if only these points are drawn, the final displayed envelope may be discontinuous. In order to make the envelope continuous, two adjacent The envelope points of the scan line are filled according to certain rules. The basic principle of envelope filling is that the filled envelope can wrap the spectrum. The specific implementation of envelope filling is as follows: Figure 5 as shown in Figure 5 As shown in (a), assume the value of a certain envelope on the i-th Doppler line (corresponding to the position of the envelope on the i-th Doppler line, as shown in the solid circle in the figure) is less than the value of the same type of envelope on the i+1 Doppler line (the solid rectangle shown in the figure), then this type of envelope needs to be filled with filling...

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Abstract

The invention provides a method for achieving flexible and efficient Doppler scanning conversion, which comprises the steps of encoding an enveloping value and storing the encoded enveloping value together with spectral data in an external large-capacity memory of a logic device, so that not only the number of enveloping memory strips is increased and the use of resources stored in a logic device sheet is reduced, but also the on-off and the switching of envelope are achieved flexibly; and under the condition that the number of the enveloping strips is not more than the difference between the memory data bit width and the spectral data bit width, the increase of the number of the enveloping strips cannot increase logical resources significantly and cannot influence the system efficiency.

Description

technical field [0001] The invention relates to a scan conversion method in an ultrasonic imaging system, in particular to a Doppler scan conversion method and a device using the method. Background technique [0002] Clinically, doctors can find out whether the blood flow of the imaged person is abnormal through ultrasound Doppler examination, and then find the lesion. Since the blood flow in the blood vessel has a flow velocity profile along the radial direction, the echo signal contains various frequency components. In order to truly reflect this situation, it is often displayed in the form of a spectrogram in the ultrasonic diagnostic instrument. In the spectrogram, the vertical axis represents the Doppler frequency, which corresponds to the blood flow velocity; the horizontal axis represents time; the gray value of the pixel in the spectrogram represents the magnitude of each frequency component corresponding to the time. [0003] in such as figure 1 In the ultrasound ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B8/06
CPCA61B8/06
Inventor 杜亚军王建永
Owner SHENZHEN MINDRAY BIO MEDICAL ELECTRONICS CO LTD