CN116999088A - Method for removing inherent interference in ultrasonic diagnostic system - Google Patents
Method for removing inherent interference in ultrasonic diagnostic system Download PDFInfo
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- CN116999088A CN116999088A CN202311056133.6A CN202311056133A CN116999088A CN 116999088 A CN116999088 A CN 116999088A CN 202311056133 A CN202311056133 A CN 202311056133A CN 116999088 A CN116999088 A CN 116999088A
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- 238000000034 method Methods 0.000 title claims abstract description 24
- 238000012545 processing Methods 0.000 claims abstract description 12
- 239000000523 sample Substances 0.000 claims description 8
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 238000003786 synthesis reaction Methods 0.000 claims description 3
- 238000003745 diagnosis Methods 0.000 abstract description 6
- 238000002604 ultrasonography Methods 0.000 description 3
- 230000005670 electromagnetic radiation Effects 0.000 description 2
- 238000003384 imaging method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000017531 blood circulation Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000002498 deadly effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
- A61B8/52—Devices using data or image processing specially adapted for diagnosis using ultrasonic, sonic or infrasonic waves
- A61B8/5215—Devices using data or image processing specially adapted for diagnosis using ultrasonic, sonic or infrasonic waves involving processing of medical diagnostic data
- A61B8/5238—Devices using data or image processing specially adapted for diagnosis using ultrasonic, sonic or infrasonic waves involving processing of medical diagnostic data for combining image data of patient, e.g. merging several images from different acquisition modes into one image
Abstract
The application relates to a method for removing inherent interference in an ultrasonic diagnostic system, comprising the following steps: step 1: when a signal of a first frame is acquired, the ultrasonic system controls a signal switch to be closed, and a first image a1 is obtained after the signal is transmitted, the signal is received and the signal is processed in sequence; step 2: when a signal of a second frame is acquired, the ultrasonic system controls a signal switch to be turned on, a second image a2 is obtained after the signal is transmitted, the signal is received and the signal is processed in sequence, a new second image a2 'is obtained through differential processing, and the new second image a2' is displayed on a display terminal of the system in real time; step 3: when the signals of N frames are acquired, the ultrasonic system controls the signal switch to be turned on, the nth image an is obtained after the signals are transmitted, received and processed in sequence, and then a new nth image an' is obtained through differential processing and displayed on a display terminal of the system in real time. The application can strengthen the accuracy of ultrasonic image diagnosis.
Description
Technical Field
The present application relates to the field of ultrasound, and more particularly to a method for removing inherent interference in an ultrasound diagnostic system.
Background
The B ultrasonic is a short name of B ultrasonic image diagnostic apparatus, its functional principle is that after a series of ultrasonic signals are transmitted into human tissue, the reflected signals from different impedance interfaces in the body are collected, and the amplitude of echo is converted into the brightness of gray value by means of signal processing to represent that a two-dimensional black-and-white image is formed on the space position corresponding to the signals.
The above actions are completed only one still two-dimensional image can be formed at a time. Repeating the above-described actions at a certain rate (fixed pulse repetition frequency) a series of still two-dimensional images can be obtained. The images are continuously and sequentially played on the display device so that the approximate real-time state of the interior of the human body can be seen.
When the existing B ultrasonic equipment works, the electric signals generated by the system are converted into acoustic signals through a probe (ultrasonic transducer) to be transmitted into a human body, and the received acoustic signals are converted into electric signals through the probe to be collected and processed into related signals. In this process, noise interference of electromagnetic radiation inside or outside is faced inevitably, like all other electronic devices.
The current method for removing electromagnetic radiation interference is to realize the inhibition by two main methods of shielding and filtering on the path of noise propagation.
The current use of ultrasonic equipment is limited to a certain extent by both of these means:
1. first, the method using metal shielding suppresses noise:
because of the large number of active and passive devices, the ultrasound system itself is both a receiving end for noise and a radiating end for interference. All the interference signals generated by the internal circuit board and the components and parts have the influence of self-radiated interference signals no matter how tightly the external interference is shielded.
2. Noise is suppressed by an analog filter or a digital filter:
either analog or digital filters can only filter out interfering signals in a specified frequency range. However, due to the working characteristics of the B ultrasonic equipment, the working frequency span of the ultrasonic probe is large aiming at the application of different parts of the human body; moreover, since the image resolution, particularly the axial resolution, is inversely proportional to the operating bandwidth of the probe, the entire system is required to operate over a wide frequency band.
Therefore, once the frequency of the interference signal falls within the bandwidth range of the system operating frequency, the interference signal is difficult to filter by a filter, otherwise, the signal is similarly restrained, and the system operation is deadly affected.
Disclosure of Invention
To solve the above-mentioned problems, an object of the present application is to provide a method for removing the inherent interference in an ultrasonic diagnostic system.
In order to achieve the above purpose, the application adopts the following technical scheme:
a method of removing inherent interference in an ultrasonic diagnostic system comprising the steps of:
step 1: when a signal of a first frame is acquired, the ultrasonic system controls a signal switch to be closed, and a first image a1 is obtained after the signal is transmitted, the signal is received and the signal is processed in sequence;
step 2: when a signal of a second frame is acquired, the ultrasonic system controls a signal switch to be turned on, a second image a2 is obtained after the signal is transmitted, the signal is received and the signal is processed in sequence, a new second image a2 'is obtained through differential processing, and the new second image a2' is displayed on a display terminal of the system in real time;
step 3: when the signals of N frames are acquired, the ultrasonic system controls the signal switch to be turned on, the nth image an is obtained after the signals are transmitted, received and processed in sequence, and then a new nth image an' is obtained through differential processing and displayed on a display terminal of the system in real time.
Preferably, in the method for removing the inherent interference in the ultrasonic diagnostic system, in the step 1, the signal switch is turned off, and the obtained image is an image of interference information generated inside the system.
Preferably, in the method for removing the inherent interference in the ultrasonic diagnostic system, the images obtained after the signal switch is turned on in the step 2 and the step 3 are images of interference information and diagnostic information generated inside the system.
Preferably, in the method for removing the inherent interference in the ultrasonic diagnostic system, the information of the new image obtained in the step 2 and the step 3 through the differential processing is the synthesis of the image after the interference information image acquired in the step 1 is removed.
Preferably, the method for removing the inherent interference in the ultrasonic diagnosis system comprises the steps that the image of the interference information is a noise signal of the system, but does not comprise spatial medium information acquired by a probe from outside.
Preferably, in the method for removing the inherent interference in the ultrasonic diagnostic system, n is greater than 2 before the nth frame is acquired and displayed, and the difference operation is performed on the nth image an and the first image a1, so as to eliminate the interference information of fixed brightness generated by the interference signal in the image fixed area. Further, the method comprises the steps of,
by means of the scheme, the application has at least the following advantages:
the application only retains useful information of human tissues in the ultrasonic image and does not contain other signals irrelevant to diagnosis requirements, so as to strengthen the accuracy of ultrasonic image diagnosis.
The foregoing description is only an overview of the present application, and is intended to provide a better understanding of the present application, as it is embodied in the following description, with reference to the preferred embodiments of the present application and the accompanying drawings.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of the present application;
FIG. 2 is a schematic diagram of the switch position of the present application;
FIG. 3a is an image of the application prior to interference removal;
fig. 3b is an image of the application after interference removal.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments of the present application. The components of the embodiments of the present application generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the application, as presented in the figures, is not intended to limit the scope of the application, as claimed, but is merely representative of selected embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
Examples
As shown in fig. 1 to 3b, a method of removing an inherent interference in an ultrasonic diagnostic system includes the steps of:
step 1: when a signal of a first frame is acquired, the ultrasonic system controls a signal switch to be closed, and a first image a1 is obtained after the signal is transmitted, the signal is received and the signal is processed in sequence;
step 2: when a signal of a second frame is acquired, the ultrasonic system controls a signal switch to be turned on, a second image a2 is obtained after the signal is transmitted, the signal is received and the signal is processed in sequence, a new second image a2 'is obtained through differential processing, and the new second image a2' is displayed on a display terminal of the system in real time;
step 3: when the signals of N frames are acquired, the ultrasonic system controls the signal switch to be turned on, the nth image an is obtained after the signals are transmitted, received and processed in sequence, and then a new nth image an' is obtained through differential processing and displayed on a display terminal of the system in real time.
In the application, in the step 1, the signal switch is turned off, and the obtained image is the image of the interference information generated in the system.
The images obtained after the signal switch is turned on in the step 2 and the step 3 in the application are the synthesis of the images of the interference information and the images of the diagnostic information generated in the system, and specifically the mixing of the interference signal and the diagnostic information.
In the application, the information of the new image obtained by the differential processing in the step 2 and the step 3 is the image after the interference information image acquired in the step 1 is removed.
The image of the interference information is a noise signal of the system, but does not comprise spatial medium information acquired by a probe from outside.
In the application, n is larger than 2 before the n frame is acquired and displayed, and the difference operation is carried out on the n image an and the first image a1, so that the interference information of fixed brightness generated by the interference signal in the image fixed area is eliminated.
In the application, when the receiving signal of the first frame is acquired, the control switch of the ultrasonic system is in a closed state, and the working state of other parts of the system is completely the same as that when the second frame and later frames are acquired. The first frame of data contains only various interference information generated inside the system, and only any information returned by the probe from the medium is not contained in the first frame of data.
When the ultrasonic system works, the interference information has a certain relation with the waveform, frequency and scanning interval of the transmitted signal. The first frame is collected once and all kinds of fixed interference information can be eliminated. The new interference pattern can be collected by turning off and on the system control switch before any mode with the change of the interference information is started, and can be eliminated in the subsequent display.
The diagnosis means of B ultrasonic in the application is far more than one mode (B mode) of gray scale display, and various measurement and diagnosis modes such as M mode, pulse Doppler mode, blood flow imaging mode and the like are developed. The application is also applicable to other imaging modes of an ultrasonic diagnostic apparatus.
In the present application, the noise signal under a specific condition (the specific condition refers to that the frequency of the interference signal is fixed, the amplitude is fixed, the pulse repetition frequency is fixed, or a combination of these factors is fixed, which together cause a noise signal that can generate a position fixed in the image area and a brightness fixed), and an interference signal with a fixed brightness is generated in the image fixed area.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the description of the present application, it should be noted that the azimuth or positional relationship indicated by the terms "vertical", "horizontal", "inner", "outer", etc. are based on the azimuth or positional relationship shown in the drawings, or the azimuth or positional relationship that is conventionally put in use of the product of this application, are merely for convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element to be referred to must have a specific azimuth, be configured and operated in a specific azimuth, and thus should not be construed as limiting the present application. Furthermore, the terms "first," "second," and the like, are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal," "vertical," and the like do not denote a requirement that the component be absolutely horizontal or vertical, but rather may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present application, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present application will be understood in specific cases by those of ordinary skill in the art.
The above description is only of the preferred embodiments of the present application and is not intended to limit the present application, and it should be noted that it is possible for those skilled in the art to make several improvements and modifications without departing from the technical principle of the present application, and these improvements and modifications should also be regarded as the protection scope of the present application.
Claims (6)
1. A method for removing the inherent interference in an ultrasonic diagnostic system, characterized in that,
the method comprises the following steps:
step 1: when a signal of a first frame is acquired, the ultrasonic system controls a signal switch to be closed, and a first image a1 is obtained after the signal is transmitted, the signal is received and the signal is processed in sequence;
step 2: when a signal of a second frame is acquired, the ultrasonic system controls a signal switch to be turned on, a second image a2 is obtained after the signal is transmitted, the signal is received and the signal is processed in sequence, a new second image a2 'is obtained through differential processing, and the new second image a2' is displayed on a display terminal of the system in real time;
step 3: when the signals of N frames are acquired, the ultrasonic system controls the signal switch to be turned on, the nth image an is obtained after the signals are transmitted, received and processed in sequence, and then a new nth image an' is obtained through differential processing and displayed on a display terminal of the system in real time.
2. The method of removing disturbances inherent in an ultrasonic diagnostic system of claim 1, wherein: in the step 1, the signal switch is turned off, and the obtained image is an image of interference information generated in the system.
3. The method of removing disturbances inherent in an ultrasonic diagnostic system of claim 1, wherein: the images acquired after the signal switch is turned on in the step 2 and the step 3 are the synthesis of the image of the interference information and the image of the diagnostic information generated in the system.
4. The method of removing disturbances inherent in an ultrasonic diagnostic system of claim 1, wherein: and step 2 and step 3 are images after the interference information image acquired in step 1 is removed by the information of the new image obtained through differential processing.
5. The method of removing disturbances inherent in an ultrasonic diagnostic system of claim 1, wherein: the image of the interference information is a noise signal of the system, but does not comprise spatial medium information acquired by the probe from outside.
6. The method of removing disturbances inherent in an ultrasonic diagnostic system of claim 1, wherein: and before the n-th frame is acquired and displayed, n is larger than 2, and the difference operation is carried out on the n-th image an and the first image a1, so that interference information of fixed brightness generated by an interference signal in an image fixed area is eliminated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311056133.6A CN116999088A (en) | 2023-08-22 | 2023-08-22 | Method for removing inherent interference in ultrasonic diagnostic system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311056133.6A CN116999088A (en) | 2023-08-22 | 2023-08-22 | Method for removing inherent interference in ultrasonic diagnostic system |
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| CN116999088A true CN116999088A (en) | 2023-11-07 |
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| CN202311056133.6A Pending CN116999088A (en) | 2023-08-22 | 2023-08-22 | Method for removing inherent interference in ultrasonic diagnostic system |
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- 2023-08-22 CN CN202311056133.6A patent/CN116999088A/en active Pending
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