A method to eliminate the influence of probe DC component on image

Abstract

The present invention provides a method for eliminating the influence of the probe DC component on the image. The DC component of the signal of each channel is eliminated before the beam synthesis of all channels of the ultrasonic probe. The elimination method is to directly eliminate the excess DC component value, thereby realizing accurate elimination of the DC component. The method eliminates the DC component of each channel signal of the probe one by one by detecting the DC component of the probe before starting the ultrasonic software. The influence of the probe DC component on the image can be better solved, the quality of the ultrasonic image can be guaranteed, and medical diagnosis can be brought convenience.

Description

Technical Field

[0001] The invention relates to the technical field of image processing, and in particular to a method for eliminating the influence of a probe direct current component on an image. Background Art

[0002] Ultrasound is the most widely used examination method in modern medical imaging technology. It is widely used in medical diagnosis due to its advantages such as safety, low cost, fast imaging, non-invasiveness and high reliability.

[0003] In the ultrasound system, the probe is an important component. The signal of each channel in the probe is an AC signal with a DC component. Before the system performs the beamforming algorithm, the DC component in the signal needs to be filtered out. Because too many DC components in the signal will waste the dynamic range of the analog front-end chip, it is likely to saturate the sampling signal, causing signal distortion, showing bright spots on the image, and affecting the image quality. The traditional method is to use a filter to directly filter out the DC component, but because the DC component of each channel is different, there may still be a DC component after filtering, resulting in low image quality and inconvenience for medical diagnosis. Summary of the invention

[0004] The invention provides a method for eliminating the influence of a probe DC component on an image, so as to solve the problem raised in the background technology.

[0005] A method for eliminating the influence of a probe DC component on an image, comprising:

[0006] S1: voltage acquisition is performed on all channels of the ultrasound probe through an analog front-end chip to obtain a voltage signal, and a DC voltage component of each channel is determined from the voltage signal;

[0007] S2: The DC voltage components of each channel are stored in sequence through FPGA to obtain DC component data;

[0008] S3: before the ultrasound system synthesizes the beam of the channel, calling the stored DC component data, and determining the elimination value for each channel based on the DC component data;

[0009] S4: determining an elimination scheme based on the elimination value of each channel, and performing component elimination on all channels simultaneously according to the elimination scheme to obtain a target voltage signal;

[0010] S5: synthesizing all channels according to the target voltage signal, and obtaining an ultrasonic image according to the synthesis result.

[0011] Preferably, voltage acquisition is performed on all channels of the ultrasound probe through an analog front-end chip to obtain a voltage signal, including:

[0012] Sending a signal acquisition instruction to all channels of the ultrasound probe through the analog front-end chip, and acquiring analog voltage signals of all channels through the signal acquisition instruction;

[0013] Performing digital conversion on the analog voltage signal to obtain a digital voltage signal;

[0014] The digital voltage signal is self-calibrated by the analog front-end chip to obtain a voltage signal.

[0015] Preferably, in S1, determining the DC voltage component of each channel from the voltage signal includes:

[0016] Obtaining waveform characteristics and waveform parameters of voltage signals;

[0017] Determine a calculation formula for a DC voltage component based on waveform characteristics, and determine parameter values ​​of the calculation formula based on waveform parameters;

[0018] Based on the calculation formula and parameter values, the DC voltage component of each channel is obtained.

[0019] Preferably, in S2, the DC voltage components of each channel are stored in sequence by FPGA to obtain DC component data, including:

[0020] After receiving the external storage instruction, the FPGA generates a trigger signal;

[0021] When a trigger signal is received, a write address is generated, and the corresponding DC voltage component is stored to obtain DC component data.

[0022] Preferably, before the DC voltage components of each channel are stored in sequence through the FPGA, the method further includes:

[0023] Acquire the arrangement characteristics of all channels in the ultrasound probe, and configure a unique identifier for each channel based on the arrangement characteristics;

[0024] Based on the corresponding relationship between the channel and the DC voltage component, a unique identifier is configured into the corresponding DC voltage component;

[0025] Based on the arrangement characteristics, the channel order is determined, and the DC voltage components for configuring the unique identifier are sorted according to the channel order.

[0026] Preferably, in S3, before the ultrasound system synthesizes the beam of the channel, calling the stored DC component data includes:

[0027] Receive an external call instruction, and generate a read address based on the call instruction;

[0028] Based on the read address, the corresponding DC component data is output from the FPGA.

[0029] Preferably, in S3, determining the elimination value for each channel based on the DC component data includes:

[0030] Based on the acquisition characteristics of the DC component data, an acquisition error is determined, and a compensation amount for the DC component data is determined;

[0031] Based on the added value of the DC component data and the compensation amount, the cancellation value for each channel is determined.

[0032] Preferably, in S4, based on the elimination value of each channel, an elimination scheme is determined, and components of all channels are eliminated simultaneously according to the elimination scheme to obtain a target voltage signal, including:

[0033] Sort the elimination values ​​of each channel in order to obtain a value sequence;

[0034] Based on the numerical sequence, an elimination code is designed, and based on the elimination code, an elimination plan is determined;

[0035] Components of all channels are eliminated simultaneously according to the elimination scheme, and the target voltage signal is obtained according to the elimination results.

[0036] Preferably, in S4, after obtaining the target voltage signal, the method further includes:

[0037] Randomly intercept a signal segment corresponding to a cycle from the target voltage signal, and determine whether the integral of the signal segment is equal to zero;

[0038] If so, it indicates that the DC voltage component of the target voltage signal is successfully eliminated;

[0039] Otherwise, it indicates that the DC voltage component of the target voltage signal is not completely eliminated, and the component elimination operation is performed on the target voltage signal again to obtain the latest target voltage signal;

[0040] Sampling the target voltage signal after the DC voltage component is successfully eliminated to obtain sampling values ​​of the sampling points, and determining whether the number of sampling points whose sampling values ​​are greater than a preset saturation value among all the sampling points is greater than a preset number;

[0041] If so, it is determined that the target voltage signal after the DC voltage component is successfully eliminated is oversaturated, and interference correction is performed on the target voltage signal after the DC voltage component is successfully eliminated to obtain a final target voltage signal;

[0042] Otherwise, it is determined that the target voltage signal after the DC voltage component is successfully eliminated is normal.

[0043] Preferably, in S5, all channels are synthesized according to the target voltage signal, and an ultrasonic image is obtained according to the synthesis result, including:

[0044] Divide the target voltage signals of all channels into multiple sub-signals according to signal characteristics;

[0045] The sub-signals of all channels with the same signal characteristics are accumulated to obtain a synthesized sub-signal;

[0046] Based on the integration of each synthesized sub-signal with the same signal feature, a synthesis result is obtained, and an ultrasonic image is obtained according to the synthesis result.

[0047] Compared with the prior art, the present invention has achieved the following beneficial effects:

[0048] By eliminating the DC component of the signal of each channel before beam synthesis of all channels of the ultrasound probe, the elimination method is to directly eliminate the excess DC component value, thereby achieving accurate elimination of the DC component. By detecting the DC component of each channel signal of the probe before starting the ultrasound software, the DC component of each channel is eliminated one by one. This method can better solve the impact of the probe DC component on the image, ensure the quality of the ultrasound image, and bring convenience to medical diagnosis.

[0049] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the written description, claims, and drawings.

[0050] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0052] Figure 1 It is a flow chart of a method for eliminating the influence of the DC component of the probe on the image in an embodiment of the present invention;

[0053] Figure 2 This is a flow chart of voltage acquisition in an embodiment of the present invention;

[0054] Figure 3 This is a flow chart of obtaining a target voltage signal in an embodiment of the present invention. DETAILED DESCRIPTION

[0055] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0056] Embodiment 1:

[0057] The embodiment of the present invention provides a method for eliminating the influence of the DC component of the probe on the image. Figure 1 As shown, including:

[0058] S1: voltage acquisition is performed on all channels of the ultrasound probe through an analog front-end chip to obtain a voltage signal, and a DC voltage component of each channel is determined from the voltage signal;

[0059] S2: The DC voltage components of each channel are stored in sequence through FPGA to obtain DC component data;

[0060] S3: before the ultrasound system synthesizes the beam of the channel, calling the stored DC component data, and determining the elimination value for each channel based on the DC component data;

[0061] S4: determining an elimination scheme based on the elimination value of each channel, and performing component elimination on all channels simultaneously according to the elimination scheme to obtain a target voltage signal;

[0062] S5: synthesizing all channels according to the target voltage signal, and obtaining an ultrasonic image according to the synthesis result.

[0063] The working principle of the above design scheme is: before the ultrasound software is started, the present invention collects the voltage of each channel of the probe through AFE, and the voltage expression is Ai+Bisin(wt), where Ai is the DC component. After FPGA receives the voltage data collected by AFE, it stores the DC component Ai of each channel in sequence, and before the system performs beam synthesis, it calls the stored data to perform one-to-one targeted elimination of the DC component of each channel.

[0064] The beneficial effect of the above design scheme is: by eliminating the DC component of the signal of each channel before the beam synthesis of all channels of the ultrasound probe, the elimination method is to directly eliminate the excess DC component value, thereby achieving accurate elimination of the DC component. By detecting the DC component of each channel signal of the probe before starting the ultrasound software, the DC component of each channel is eliminated one by one, which can better solve the influence of the DC component of the probe on the image, ensure the quality of the ultrasound image, and bring convenience to medical diagnosis.

[0065] Embodiment 2:

[0066] Based on Example 1, the present invention provides a method for eliminating the influence of the probe DC component on the image, such as Figure 2 As shown, the voltage of all channels of the ultrasound probe is collected through the analog front-end chip to obtain voltage signals, including:

[0067] S101: sending a signal acquisition instruction to all channels of the ultrasound probe through the analog front-end chip, and acquiring analog voltage signals of all channels through the signal acquisition instruction;

[0068] S102: performing digital conversion on the analog voltage signal to obtain a digital voltage signal;

[0069] S103: Perform self-calibration on the digital voltage signal through the analog front-end chip to obtain a voltage signal.

[0070] The beneficial effects of the above design scheme are: sending signal acquisition instructions to all channels of the ultrasonic probe through the analog front-end chip, and acquiring analog voltage signals of all channels through the signal acquisition instructions; performing digital conversion on the analog voltage signal to obtain a digital voltage signal; performing self-calibration on the digital voltage signal through the analog front-end chip to obtain a voltage signal, thereby achieving high-precision acquisition and processing of voltage signals of all channels of the ultrasonic probe, and ensuring the accuracy of the obtained voltage signal.

[0071] Embodiment 3:

[0072] Based on Example 1, the embodiment of the present invention provides a method for eliminating the influence of the DC component of the probe on the image. In S1, the DC voltage component of each channel is determined from the voltage signal, including:

[0073] Obtaining waveform characteristics and waveform parameters of voltage signals;

[0074] Determine a calculation formula for a DC voltage component based on waveform characteristics, and determine parameter values ​​of the calculation formula based on waveform parameters;

[0075] Based on the calculation formula and parameter values, the DC voltage component of each channel is obtained.

[0076] In this embodiment, for example, the voltage expression is Ai+Bisin(wt), where Ai is a DC component.

[0077] The beneficial effects of the above design scheme are: by obtaining the waveform characteristics and waveform parameters of the voltage signal; determining the calculation formula of the DC voltage component based on the waveform characteristics, and determining the parameter values ​​of the calculation formula based on the waveform parameters; based on the calculation formula and the parameter values, the DC voltage component of each channel is obtained, providing a method for calculating the DC voltage component.

[0078] Embodiment 4:

[0079] Based on Example 1, the embodiment of the present invention provides a method for eliminating the influence of the DC component of the probe on the image. In S2, the DC voltage component of each channel is stored in sequence by FPGA to obtain DC component data, including:

[0080] After receiving the external storage instruction, the FPGA generates a trigger signal;

[0081] When a trigger signal is received, a write address is generated, and the corresponding DC voltage component is stored to obtain DC component data.

[0082] In this embodiment, one write address is stored corresponding to one DC voltage component.

[0083] The beneficial effect of the above design scheme is: after receiving the external storage instruction through FPGA, a trigger signal is generated. When the trigger signal is received, a write address is generated, and the corresponding DC voltage component is stored to obtain DC component data, thereby realizing orderly storage of DC component data and providing a basis for component elimination before beamforming.

[0084] Embodiment 5:

[0085] Based on Example 1, the embodiment of the present invention provides a method for eliminating the influence of the DC component of the probe on the image, and before the DC voltage component of each channel is stored in sequence through the FPGA, the method further includes:

[0086] Acquire the arrangement characteristics of all channels in the ultrasound probe, and configure a unique identifier for each channel based on the arrangement characteristics;

[0087] Based on the corresponding relationship between the channel and the DC voltage component, a unique identifier is configured into the corresponding DC voltage component;

[0088] Based on the arrangement characteristics, the channel order is determined, and the DC voltage components for configuring the unique identifier are sorted according to the channel order.

[0089] In this embodiment, the ranking features include features such as actual clerical job distribution and relative position distribution.

[0090] The beneficial effect of the above design scheme is: by determining the channel order based on the arrangement characteristics of all channels in the acoustic probe, the DC voltage components with unique identifiers are sorted according to the channel order, thereby achieving orderly storage of the DC voltage components, and the channels corresponding to the stored DC voltage components are clearly identified through unique identifiers, providing an accurate basis for component elimination.

[0091] Embodiment 6:

[0092] Based on Example 1, the embodiment of the present invention provides a method for eliminating the influence of the DC component of the probe on the image. In S3, before the ultrasound system synthesizes the beam of the channel, the stored DC component data is called, including:

[0093] Receive an external call instruction, and generate a read address based on the call instruction;

[0094] Based on the read address, the corresponding DC component data is output from the FPGA.

[0095] In this embodiment, one read address corresponds to the output of one DC component data.

[0096] The beneficial effects of the above design scheme are: by receiving an external call instruction, a read address is generated based on the call instruction; based on the read address, the corresponding DC component data is output from the FPGA to realize the call of the DC component data, providing a basis for further component elimination.

[0097] Embodiment 7:

[0098] Based on Example 1, the embodiment of the present invention provides a method for eliminating the influence of the DC component of the probe on the image. In S3, based on the DC component data, the elimination value for each channel is determined, including:

[0099] Based on the acquisition characteristics of the DC component data, an acquisition error is determined, and a compensation amount for the DC component data is determined;

[0100] Based on the added value of the DC component data and the compensation amount, the cancellation value for each channel is determined.

[0101] In this embodiment, the acquisition characteristics include the accuracy of the acquisition device, the acquisition frequency, etc.

[0102] In this embodiment, the compensation amount of the DC component data may be positive or negative.

[0103] The beneficial effects of the above design scheme are: by determining the acquisition error based on the acquisition characteristics of the DC component data, determining the compensation amount for the DC component data, and determining the elimination value for each channel through the DC component data combined with the compensation amount, thereby ensuring the accuracy of the determined elimination value.

[0104] Embodiment 8:

[0105] Based on Example 1, the present invention provides a method for eliminating the influence of the probe DC component on the image, such as Figure 3 As shown, in S4, based on the elimination value of each channel, an elimination scheme is determined, and components of all channels are eliminated simultaneously according to the elimination scheme to obtain a target voltage signal, including:

[0106] S401: sorting the elimination values ​​of each channel in order to obtain a value sequence;

[0107] S402: Based on the numerical sequence, an elimination code is designed, and based on the elimination code, an elimination plan is determined;

[0108] S403: performing component elimination on all channels simultaneously according to the elimination scheme, and obtaining a target voltage signal according to the elimination result.

[0109] The beneficial effects of the above design scheme are: by designing an elimination code based on a numerical sequence, an elimination scheme is determined based on the elimination code; components of all channels are eliminated simultaneously according to the elimination scheme, and the target voltage signal is obtained according to the elimination result, thereby realizing batch elimination of the voltage signals of all channels used, improving the elimination efficiency, and realizing the elimination of DC components through the method of numerical elimination, thereby improving the elimination accuracy.

[0110] Embodiment 9:

[0111] Based on Example 1, the embodiment of the present invention provides a method for eliminating the influence of the DC component of the probe on the image. In S4, after obtaining the target voltage signal, the method further includes:

[0112] Randomly intercept a signal segment corresponding to a cycle from the target voltage signal, and determine whether the integral of the signal segment is equal to zero;

[0113] If so, it indicates that the DC voltage component of the target voltage signal is successfully eliminated;

[0114] Otherwise, it indicates that the DC voltage component of the target voltage signal is not completely eliminated, and the component elimination operation is performed on the target voltage signal again to obtain the latest target voltage signal;

[0115] Sampling the target voltage signal after the DC voltage component is successfully eliminated to obtain sampling values ​​of the sampling points, and determining whether the number of sampling points whose sampling values ​​are greater than a preset saturation value among all the sampling points is greater than a preset number;

[0116] If so, it is determined that the target voltage signal after the DC voltage component is successfully eliminated is oversaturated, and interference correction is performed on the target voltage signal after the DC voltage component is successfully eliminated to obtain a final target voltage signal;

[0117] Otherwise, it is determined that the target voltage signal after the DC voltage component is successfully eliminated is normal.

[0118] In this embodiment, the component elimination operation is performed again on the target voltage signal in the same manner as the first elimination operation.

[0119] In this embodiment, interference correction such as signal reconstruction and phase adjustment is performed on the target voltage signal after the DC voltage component is successfully eliminated.

[0120] The beneficial effect of the above design scheme is: after obtaining the target voltage signal, firstly determine whether the DC component of the target voltage signal is eliminated and perform corresponding operations, then sample the target voltage signal after the DC voltage component is successfully eliminated to obtain the sampling value of the sampling point, and determine whether the number of sampling points whose sampling values ​​are greater than the preset saturation value among all the sampling points is greater than the preset number; if so, determine that the target voltage signal after the DC voltage component is successfully eliminated is oversaturated, perform interference correction on the target voltage signal after the DC voltage component is successfully eliminated, and obtain the final target voltage signal; otherwise, determine that the target voltage signal after the DC voltage component is successfully eliminated is normal, and through two judgments and adjustments, ensure that the target voltage signal finally obtained does not have saturation, providing a basis for ensuring the quality of the image after synthesis.

[0121] Embodiment 10:

[0122] Based on Example 1, the embodiment of the present invention provides a method for eliminating the influence of the DC component of the probe on the image. In S5, all channels are synthesized according to the target voltage signal, and an ultrasonic image is obtained according to the synthesis result, including:

[0123] Divide the target voltage signals of all channels into multiple sub-signals according to signal characteristics;

[0124] The sub-signals of all channels with the same signal characteristics are accumulated to obtain a synthesized sub-signal;

[0125] Based on the integration of each synthesized sub-signal with the same signal feature, a synthesis result is obtained, and an ultrasonic image is obtained according to the synthesis result.

[0126] In this embodiment, the signal feature is, for example, dividing the target voltage signal according to frequency ranges.

[0127] The beneficial effects of the above design scheme are: by dividing the target voltage signals of all channels into multiple sub-signals according to the signal characteristics; accumulating the sub-signals of all channels with the same signal characteristics to obtain a synthesized sub-signal, synthesizing the sub-signals under different signal characteristics, and then integrating them based on the synthesized sub-signals with the same signal characteristics to obtain a synthesis result, and obtaining an ultrasonic image based on the synthesis result, ensuring the optimality of the synthesis effect, thereby ensuring the quality of the ultrasonic image, which brings convenience to medical diagnosis.

[0128] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A method for eliminating the influence of the probe DC component on the image, characterized in that: include: S1: voltage acquisition is performed on all channels of the ultrasound probe through an analog front-end chip to obtain a voltage signal, and a DC voltage component of each channel is determined from the voltage signal; S2: The DC voltage components of each channel are stored in sequence through FPGA to obtain DC component data; S3: before the ultrasound system synthesizes the beam of the channel, calling the stored DC component data, and determining the elimination value for each channel based on the DC component data; S4: determining an elimination scheme based on the elimination value of each channel, and performing component elimination on all channels simultaneously according to the elimination scheme to obtain a target voltage signal; S5: synthesizing all channels according to the target voltage signal, and obtaining an ultrasound image according to the synthesis result; In S4, based on the elimination value of each channel, an elimination scheme is determined, and components of all channels are eliminated simultaneously according to the elimination scheme to obtain a target voltage signal, including: Sort the elimination values ​​of each channel in order to obtain a value sequence; Based on the numerical sequence, an elimination code is designed, and based on the elimination code, an elimination plan is determined; Perform component elimination on all channels simultaneously according to the elimination scheme, and obtain the target voltage signal according to the elimination result; In the above S4, after obtaining the target voltage signal, the following step is further included: Randomly intercept a signal segment corresponding to a cycle from the target voltage signal, and determine whether the integral of the signal segment is equal to zero; If so, it indicates that the DC voltage component of the target voltage signal is successfully eliminated; Otherwise, it indicates that the DC voltage component of the target voltage signal is not completely eliminated, and the component elimination operation is performed on the target voltage signal again to obtain the latest target voltage signal; Sampling the target voltage signal after the DC voltage component is successfully eliminated to obtain sampling values ​​of the sampling points, and determining whether the number of sampling points whose sampling values ​​are greater than a preset saturation value among all the sampling points is greater than a preset number; If so, it is determined that the target voltage signal after the DC voltage component is successfully eliminated is oversaturated, and interference correction is performed on the target voltage signal after the DC voltage component is successfully eliminated to obtain a final target voltage signal; Otherwise, it is determined that the target voltage signal after the DC voltage component is successfully eliminated is normal.

2. The method for eliminating the influence of the probe DC component on the image according to claim 1, characterized in that: The analog front-end chip collects voltage from all channels of the ultrasound probe to obtain voltage signals, including: Sending a signal acquisition instruction to all channels of the ultrasound probe through the analog front-end chip, and acquiring analog voltage signals of all channels through the signal acquisition instruction; Performing digital conversion on the analog voltage signal to obtain a digital voltage signal; The digital voltage signal is self-calibrated by an analog front-end chip to obtain a voltage signal.

3. The method for eliminating the influence of the probe DC component on the image according to claim 1, characterized in that: In S1, the DC voltage component of each channel is determined from the voltage signal, including: Obtaining waveform characteristics and waveform parameters of voltage signals; Determine a calculation formula for a DC voltage component based on waveform characteristics, and determine parameter values ​​of the calculation formula based on waveform parameters; Based on the calculation formula and parameter values, the DC voltage component of each channel is obtained.

4. The method for eliminating the influence of the probe DC component on the image according to claim 1, characterized in that: In S2, the DC voltage components of each channel are stored in sequence through FPGA to obtain DC component data, including: After receiving the external storage instruction, the FPGA generates a trigger signal; When a trigger signal is received, a write address is generated, and the corresponding DC voltage component is stored to obtain DC component data.

5. The method for eliminating the influence of the probe DC component on the image according to claim 1, characterized in that: Before the DC voltage components of each channel are stored in sequence through the FPGA, the following steps are also included: Acquire the arrangement characteristics of all channels in the ultrasound probe, and configure a unique identifier for each channel based on the arrangement characteristics; Based on the corresponding relationship between the channel and the DC voltage component, a unique identifier is configured into the corresponding DC voltage component; Based on the arrangement characteristics, the channel order is determined, and the DC voltage components for configuring the unique identifier are sorted according to the channel order.

6. The method for eliminating the influence of the probe DC component on the image according to claim 1, characterized in that: In S3, before the ultrasound system synthesizes the beam of the channel, the stored DC component data is called, including: Receive an external call instruction, and generate a read address based on the call instruction; Based on the read address, the corresponding DC component data is output from the FPGA.

7. The method for eliminating the influence of the probe DC component on the image according to claim 1, characterized in that: In S3, based on the DC component data, the elimination value for each channel is determined, including: Based on the acquisition characteristics of the DC component data, an acquisition error is determined, and a compensation amount for the DC component data is determined; Based on the added value of the DC component data and the compensation amount, the cancellation value for each channel is determined.

8. The method for eliminating the influence of the probe DC component on the image according to claim 1, characterized in that: In S5, all channels are synthesized according to the target voltage signal, and an ultrasonic image is obtained according to the synthesis result, including: Divide the target voltage signals of all channels into multiple sub-signals according to signal characteristics; The sub-signals of all channels with the same signal characteristics are accumulated to obtain a synthesized sub-signal; Based on the integration of each synthesized sub-signal with the same signal feature, a synthesis result is obtained, and an ultrasonic image is obtained according to the synthesis result.

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