WO2020024290A1 - 一种超声成像方法及装置、计算机可读存储介质 - Google Patents

一种超声成像方法及装置、计算机可读存储介质 Download PDF

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Publication number
WO2020024290A1
WO2020024290A1 PCT/CN2018/098664 CN2018098664W WO2020024290A1 WO 2020024290 A1 WO2020024290 A1 WO 2020024290A1 CN 2018098664 W CN2018098664 W CN 2018098664W WO 2020024290 A1 WO2020024290 A1 WO 2020024290A1
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angle
imaging data
correlation
data
coefficient
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PCT/CN2018/098664
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English (en)
French (fr)
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朱磊
章希睿
桑茂栋
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深圳迈瑞生物医疗电子股份有限公司
深圳迈瑞科技有限公司
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Priority to PCT/CN2018/098664 priority Critical patent/WO2020024290A1/zh
Priority to CN201880005473.7A priority patent/CN110267599B/zh
Publication of WO2020024290A1 publication Critical patent/WO2020024290A1/zh

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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
    • A61B8/08—Detecting organic movements or changes, e.g. tumours, cysts, swellings
    • A61B8/0833—Detecting organic movements or changes, e.g. tumours, cysts, swellings involving detecting or locating foreign bodies or organic structures
    • A61B8/085—Detecting organic movements or changes, e.g. tumours, cysts, swellings involving detecting or locating foreign bodies or organic structures for locating body or organic structures, e.g. tumours, calculi, blood vessels, nodules
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B8/00—Diagnosis using ultrasonic, sonic or infrasonic waves
    • A61B8/44—Constructional features of the ultrasonic, sonic or infrasonic diagnostic device
    • 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
    • A61B8/5207—Devices using data or image processing specially adapted for diagnosis using ultrasonic, sonic or infrasonic waves involving processing of raw data to produce diagnostic data, e.g. for generating an image
    • 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
    • A61B8/5269—Devices using data or image processing specially adapted for diagnosis using ultrasonic, sonic or infrasonic waves involving detection or reduction of artifacts
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B2503/00—Evaluating a particular growth phase or type of persons or animals
    • A61B2503/40—Animals

Definitions

  • Embodiments of the present invention relate to the field of ultrasound imaging, and in particular, to an ultrasound imaging method and device, and a computer-readable storage medium.
  • ultrasonic plane wave technology has the advantages of fewer transmission times and high imaging frame rate, which makes ultrasonic plane wave technology available in imaging modes such as contrast, elasticity, conventional two-dimensional and color blood flow. widely used.
  • the differences in the transmission methods of ultrasonic plane wave technology and traditional focused imaging technology have led to insufficient penetration power of plane wave images and poor lateral resolution.
  • Coherent angle composite technology has become an indispensable processing link for ultrasonic plane wave imaging.
  • embodiments of the present invention expect to provide an ultrasonic imaging method and device, and a computer-readable storage medium, which can reduce noise in a composite image and improve the contrast resolution of the composite image.
  • An embodiment of the present invention provides an ultrasound imaging method, which is applied to an ultrasound imaging device, and the method includes:
  • multi-angle imaging data is acquired, and the multi-angle imaging data is imaging data at the multiple deflection angles;
  • an enhancement coefficient that is positively correlated with the correlation of the adjacent-angle imaging data according to the correlation coefficient, and the enhancement coefficient is a coefficient corresponding to the multi-angle imaging data;
  • the enhanced coefficient is used to process multi-angle composite data or the multi-angle imaging data to obtain an enhanced image.
  • the multi-angle composite data is data obtained by coherently angle-combining the multi-angle imaging data.
  • the obtaining, according to the correlation coefficient, an enhancement coefficient that is positively correlated with the correlation of the adjacent-angle imaging data includes:
  • the enhancement coefficient that is positively correlated with the correlation is calculated.
  • determining the correlation degree of the adjacent angle imaging data according to the correlation coefficient and a preset correlation model includes:
  • the first output result is determined as the correlation degree.
  • the preset enhancement coefficient model includes two parts of an addition operation and a preset monotonic function, and the monotonicity of the preset monotonic function is positively correlated with the correlation, and according to the correlation and A preset enhancement coefficient model to calculate the enhancement coefficient that is positively related to the correlation includes:
  • the second output result is determined as the enhancement coefficient.
  • the acquiring multi-angle imaging data includes:
  • multi-angle imaging data is multi-angle contrast imaging data and / or multi-angle tissue imaging data.
  • the method further includes:
  • using the enhancement coefficient to process multi-angle composite data or the multi-angle imaging data to obtain an enhanced image includes:
  • using the enhancement coefficient to process multi-angle composite data or the multi-angle imaging data to obtain an enhanced image includes:
  • the coherent angle recombination technology is used to perform coherent angle recombination on the multi-angle imaging data after point-to-point processing to obtain the enhanced image.
  • the point-to-point processing includes any one of point-to-point addition or point-to-point multiplication.
  • the signal characteristics include at least one of a signal amplitude, a signal phase, and a signal frequency.
  • the method further includes:
  • Digital gain compensation is performed on the enhanced image using a preset compensation algorithm to obtain a plane wave image to be displayed.
  • An embodiment of the present invention provides an ultrasound imaging apparatus, and the ultrasound imaging apparatus includes:
  • a transmitting circuit that excites the probe to transmit a plurality of planar beams to a target object
  • a receiving circuit that receives an ultrasonic echo returned from the target object through the probe to obtain a multi-angle echo signal
  • a processor that processes the multi-angle echo signal to obtain an enhanced image of the target object
  • the processor further performs the following steps:
  • multi-angle imaging data is acquired, and the multi-angle imaging data is imaging data at multiple deflection angles;
  • an enhancement coefficient that is positively correlated with the correlation of the adjacent-angle imaging data according to the correlation coefficient, and the enhancement coefficient is a coefficient corresponding to the multi-angle imaging data;
  • the enhanced coefficient is used to process multi-angle composite data or the multi-angle imaging data to obtain an enhanced image.
  • the multi-angle composite data is data obtained by coherently angle-combining the multi-angle imaging data.
  • the processor is further configured to determine a correlation degree of the adjacent angle imaging data according to the correlation coefficient and a preset correlation model, and the correlation degree characterizes the adjacent angle Correlation of imaging data; according to the correlation and a preset enhancement coefficient model, the enhancement coefficient that is positively correlated with the correlation is calculated.
  • the processor is further configured to input the correlation coefficient into the preset correlation model to obtain a first output result; and determine the first output result as the correlation degree.
  • the preset enhancement coefficient model includes two parts of an addition operation and a preset monotonic function, and the monotonicity of the preset monotonic function is positively related to the correlation,
  • the processor is further configured to input the correlation degree into the preset enhancement coefficient model; perform the addition operation on the correlation degrees to obtain a total correlation degree; The sum of the correlations is calculated to obtain a second output result; and the second output result is determined as the enhancement coefficient.
  • the transmitting circuit is configured to transmit a plurality of plane beams under the plurality of deflection angles, and each of the plurality of deflection angles corresponds to at least one plane beam;
  • the receiving circuit is configured to receive a multi-angle echo signal in response to the multiple plane beams, and the multi-angle echo signal is an echo signal at the multiple deflection angles;
  • the processor is configured to process the multi-angle echo signal into the multi-angle imaging data, where the multi-angle imaging data is multi-angle contrast imaging data and / or multi-angle tissue imaging data.
  • the processor is further configured to use coherent angle composite technology to perform coherent angle composite on the multi-angle imaging data to obtain the multi-angle composite data; and use the enhancement coefficient to The multi-angle composite data is subjected to point-to-point processing to obtain the enhanced image.
  • the processor is further configured to perform point-to-point processing on the multi-angle imaging data by using the enhancement coefficient; and use coherent angle composite technology to perform the multi-angle imaging data after the point-to-point processing. Coherent angle recombination to obtain the enhanced image.
  • the point-to-point processing includes any one of point-to-point addition or point-to-point multiplication.
  • the signal characteristics include at least one of a signal amplitude, a signal phase, and a signal frequency.
  • the processor is further configured to perform digital gain compensation on the enhanced image using a preset compensation algorithm to obtain a plane wave image to be displayed.
  • An embodiment of the present invention provides a computer-readable storage medium on which a computer program is stored, which is applied to an ultrasound imaging apparatus.
  • the computer program is executed by a processor, the ultrasound imaging method as described above is implemented.
  • Embodiments of the present invention provide an ultrasound imaging method and device, and a computer-readable storage medium.
  • the method includes: acquiring multi-angle imaging data during plane wave imaging, and the multi-angle imaging data is imaging data at multiple deflection angles; Signal characteristics, calculating correlation coefficients between adjacent-angle imaging data in multi-angle imaging data, adjacent-angle imaging data is imaging data corresponding to two adjacent deflection angles among multiple deflection angles;
  • the correlation coefficient of the angle imaging data is a positive correlation enhancement coefficient, and the enhancement coefficient is the coefficient corresponding to the multi-angle imaging data; using the enhancement coefficient, the multi-angle composite data or the multi-angle imaging data is processed to obtain an enhanced image.
  • Coherent angle recombination of multi-angle imaging data is acquiring multi-angle imaging data during plane wave imaging, and the multi-angle imaging data is imaging data at multiple deflection angles; Signal characteristics, calculating correlation coefficients between adjacent-angle imaging data in multi-angle imaging data, adjacent-angle imaging data is imaging data corresponding to two adjacent deflection angles among multiple de
  • the ultrasound imaging data uses correlation coefficients between adjacent-angle imaging data in the multi-angle imaging data to obtain correlations with adjacent-angle imaging data. Enhancement coefficient with positive correlation, and finally use the enhancement coefficient to process multi-angle imaging data or multi-angle composite data obtained by coherent angle recombination of multi-angle imaging data to obtain an enhanced image. Because the enhancement coefficient can suppress low-correlation Multi-angle composite data, enhanced multi-angle composite data with high correlation, reduces the noise in the resulting enhanced image, and further improves the contrast resolution of the enhanced image.
  • FIG. 1 is a schematic diagram of a conventional coherent angle recombination technology according to an embodiment of the present invention
  • FIG. 2 (a) is a signal transmission and reception diagram of a conventional focus imaging technology provided by an embodiment of the present invention
  • FIG. 2 (b) is a signal transmission and reception diagram of a plane wave technology according to an embodiment of the present invention.
  • FIG. 3 (a) is a schematic diagram of a focused emission sound field provided by an embodiment of the present invention.
  • FIG. 3 (b) is a schematic diagram of a plane wave emission sound field provided by an embodiment of the present invention.
  • FIG. 4 is a first flowchart of an ultrasound imaging method according to an embodiment of the present invention.
  • FIG. 5 is a schematic flowchart of an exemplary ultrasonic imaging method according to an embodiment of the present invention.
  • FIG. 6 (a) is an exemplary plane wave tissue image obtained by using conventional coherent angle recombination technology according to an embodiment of the present invention
  • FIG. 6 (b) is an exemplary plane wave tissue image obtained by using a coherent angle recombination technique considering an enhancement coefficient according to an embodiment of the present invention
  • FIG. 7 (a) is an exemplary plane wave contrast image obtained by using a conventional coherent angle recombination technique according to an embodiment of the present invention
  • FIG. 7 (b) is an exemplary plane wave contrast image obtained by using a coherent angle recombination technique considering an enhancement coefficient according to an embodiment of the present invention
  • FIG. 8 is a flowchart of an ultrasound imaging method based on signal amplitude correlation according to an embodiment of the present invention.
  • FIG. 9 is a flowchart of an ultrasonic imaging method based on signal phase correlation according to an embodiment of the present invention.
  • FIG. 10 is a flowchart of an ultrasound imaging method based on signal frequency correlation according to an embodiment of the present invention.
  • FIG. 11 is a second flowchart of an ultrasound imaging method according to an embodiment of the present invention.
  • FIG. 12 is a schematic structural diagram of an ultrasonic imaging apparatus according to an embodiment of the present invention.
  • the frame rate limit of most commercial ultrasound imaging devices is 30 frames per second, which is extremely detrimental to the real-time diagnosis of fast-moving organs such as the heart. How to increase the frame rate as much as possible without losing image quality has become one of the technical difficulties in the field of ultrasound imaging. Therefore, the ultrasonic plane wave technology is introduced. Assume that a frame image has N receiving beams, as shown in Fig. 2 (a). When formed using the traditional single-beam focused imaging technology, the ultrasonic imaging device needs to transmit # 1, # 2, ...
  • the ultrasonic plane wave technology only needs to transmit the full array element once to transmit the whole area to receive a frame image, so that the number of transmissions using the ultrasonic plane wave technology is traditional. 1 / N of single-beam focused imaging technology. Even if traditional focused imaging uses parallel multi-beam processing methods such as dual-beam, four-beam, and even eight-beam to increase the frame rate, the advantage of plane waves in reducing the number of transmissions is still huge. Finally, it is reflected in the use of ultrasonic plane waves. The technology has greatly improved the imaging frame rate. Therefore, the ultrasound plane wave technology is widely used in imaging modes such as contrast imaging, elasticity, conventional two-dimensional and color blood flow.
  • the difference in the number of transmissions between the ultrasonic plane wave technology and the traditional focused imaging technology results in a difference in the transmitted sound field.
  • the intensity of the emitted sound field of the plane wave is only Within the range of 1-2cm, it is equivalent to the traditional focused emission.
  • the intensity of the plane wave's emitted sound field gradually weakens, making the resulting plane wave image penetrating power insufficient; and the plane wave has no emission focus, and is only performed at the receiving end Beam synthesis results in insufficient penetration and poor lateral resolution of the plane wave image. Therefore, coherent angle composite technology is introduced to solve the problems of insufficient penetration and poor lateral resolution in plane wave imaging.
  • An embodiment of the present invention provides an ultrasound imaging method, which is applied to an ultrasound imaging device. As shown in FIG. 4, the method may include:
  • multi-angle imaging data is acquired, and the multi-angle imaging data is imaging data at multiple deflection angles.
  • An ultrasonic imaging method provided by an embodiment of the present invention is applicable to a scene of ultrasonic plane wave imaging based on coherent angle composite technology.
  • the ultrasound imaging scene using plane wave emission includes plane wave blood flow, plane wave conventional two-dimensional, plane wave contrast imaging, etc., and is specifically selected according to the actual situation, which is not specifically limited in the embodiment of the present invention.
  • the ultrasound imaging device when the ultrasound imaging device performs plane wave imaging, the ultrasound imaging device sets a plurality of deflection angles in advance, and the ultrasound imaging device deflects and emits at least one plane beam toward the measured object at each deflection angle.
  • the ultrasonic imaging device For non-focused transmission, the ultrasonic imaging device performs multiple plane beam transmission processes, and each time it receives a set of echo signals in response to the planar beam. Finally, the ultrasonic imaging device receives multi-angle echo signals at multiple deflection angles.
  • the multi-angle echo signal can obtain image information at multiple deflection angles.
  • the multi-angle imaging data is multi-angle contrast imaging data and / or multi-angle tissue imaging data.
  • the ultrasonic imaging device performs beam synthesis processing on the multi-angle echo signals to obtain multi-angle beam synthesis data at multiple deflection angles.
  • the ultrasound imaging device uses ultra-wideband non-linear contrast imaging technology to process multi-angle beam synthesis data into multi-angle tissue imaging data and / or multi-angle contrast imaging data.
  • the ultrasound imaging device After the ultrasound imaging device obtains the multi-angle tissue imaging data and / or the multi-angle contrast imaging data, the ultrasound imaging device must perform the ultrasound plane wave imaging process on the multi-angle tissue imaging data and / or the multi-angle contrast imaging data, respectively. Thereby, tissue images and / or contrast images are obtained.
  • the ultrasound imaging device uses coherent angle compounding technology to perform coherent angle compounding of the multi-angle imaging data to obtain the compounded multi-angle compound data, among which the multi-angle compound data It is used to perform point-to-point processing with the enhancement coefficient calculated later to obtain an enhanced image.
  • the adjacent-angle imaging data is imaging data corresponding to two adjacent deflection angles in the plurality of deflection angles.
  • the ultrasonic imaging device After the ultrasonic imaging device acquires multi-angle imaging data in the plane wave imaging process, the ultrasonic imaging device needs to calculate the correlation coefficient between adjacent-angle imaging data in the multi-angle imaging data based on the signal characteristics.
  • the ultrasound imaging device obtains the enhancement of the multi-angle imaging data by calculating the enhancement coefficients of the data points at multiple deflection angles. Coefficients. First, the ultrasound imaging device calculates correlation coefficients between imaging data of adjacent angles by sequentially calculating correlation coefficients between data points at the same position corresponding to adjacent angles.
  • the signal characteristics include signal amplitude, signal phase, and signal frequency, etc., and are specifically selected according to actual conditions, and are not specifically limited in the embodiment of the present invention.
  • the correlation coefficient an enhancement coefficient that is positively correlated with the correlation of adjacent-angle imaging data is obtained, and the enhancement coefficient is a coefficient corresponding to the multi-angle imaging data.
  • the ultrasound imaging device After the ultrasound imaging device calculates the correlation coefficient between the imaging data of adjacent angles, the ultrasound imaging device needs to obtain an enhancement coefficient that is positively correlated with the correlation of the imaging data of adjacent angles according to the correlation coefficient.
  • the ultrasound imaging device inputs a correlation coefficient into a preset correlation model, and determines the first output result as the correlation degree of the adjacent angle imaging data, wherein the preset correlation model uses the preset correlation coefficient.
  • the threshold is used to calculate the correlation. Specifically, the preset correlation model compares the input correlation coefficient with the preset correlation coefficient threshold, and assigns different correlation values according to the comparison result.
  • the correlation obtained by the preset correlation model represents the correlation between the imaging data of adjacent angles
  • the calculation principle of the preset correlation model may be the correlation between the imaging data of adjacent angles. The higher the output, the lower the correlation, or the higher the correlation between the adjacent angle imaging data, the higher the output correlation.
  • the calculation principle of the preset correlation model is selected according to the actual situation. The embodiment of the present invention does not make specific The limit.
  • the ultrasound imaging device calculates an enhancement coefficient that is positively correlated with the correlation according to the correlation degree and a preset enhancement coefficient model.
  • the ultrasound imaging device inputs the correlation degree into a preset enhancement coefficient model, and then, in the preset enhancement coefficient model, the ultrasound imaging device adds the correlation degrees to obtain the sum of the correlation degrees, and uses the preset monotony
  • the function calculates the sum of the correlations to obtain the final enhancement coefficient.
  • the monotonicity of the preset monotonic function is positively related to the correlation. For example, when the preset correlation model is calculated based on the The higher the output is, the lower the correlation is.
  • the preset monotonic function is a monotonically decreasing function. When the calculation principle of the preset correlation model is that the higher the correlation between adjacent angle imaging data, the higher the output correlation.
  • the monotonic function is a monotonic increasing function, and is specifically selected according to the actual situation, which is not specifically limited in the embodiment of the present invention.
  • the enhancement coefficient calculated by the ultrasound imaging device is an adjacent angle correlation factor (AACF, Adjacent Angle Correlation Factor), and the detailed calculation method of AACF is as follows:
  • cov ( ⁇ ) and var ( ⁇ ) represent covariance and variance operations, respectively;
  • Formula (2) is a formula of a preset correlation model, and comp ( ⁇ m, n, k , ⁇ ) is a correlation between imaging data of adjacent angles, where comp ( ⁇ ) represents a numerical comparison operation, and ⁇ is Adjustable correlation coefficient threshold, its value range is (0,1).
  • the above-mentioned preset correlation model indicates that when the correlation coefficient is greater than the preset correlation coefficient threshold, the correlation between adjacent angle imaging data is 0, when When the correlation coefficient is smaller than the preset correlation coefficient threshold, the correlation between adjacent angle imaging data is 1.
  • the calculation principle of the preset correlation model is that the correlation between the adjacent angle imaging data is high and the output correlation is low.
  • the third step is to calculate the AACF m, n at the mth point in the vertical direction and the nth line in the horizontal direction:
  • AACF m is the enhancement coefficient of multi-angle imaging data, where sum ⁇ represents the summation operation.
  • the preset monotonic function in formula (3) is a monotonically decreasing function, and according to formula (2), sum ⁇ comp ( ⁇ m, n , ⁇ ) ⁇ ⁇ [0, K-1], According to formula (3) , the value range of AACF m, n is (0,1). Considering formula (2) and formula (3) comprehensively, when the correlation between adjacent angle imaging data is high, sum ⁇ The value of comp ( ⁇ m, n , ⁇ ) ⁇ is close to 0, and AACF m, n tends to 1; otherwise, the value of sum ⁇ comp ( ⁇ m, n , ⁇ ) ⁇ is close to K-1, AACF m, n tends to 0.
  • the preset monotonic function in formula (3) is a monotonically increasing function, and is specifically selected according to the actual situation, which is not specifically limited in the embodiment of the present invention.
  • AACF can measure the composite quality of data points under multiple coherent angles. The closer AACF is to 1, it means that the composite quality of this data point is higher and should be retained or even enhanced; the closer AACF is to 0, this indicates The worse the composite quality of the data points, the more they should be suppressed.
  • the enhancement coefficient is data obtained by coherently angle-combining the multi-angle imaging data.
  • the ultrasound imaging device After the ultrasound imaging device calculates the enhancement coefficient, the ultrasound imaging device needs to use the enhancement coefficient to process the multi-angle imaging data or multi-angle composite data after coherent angle compounding of the multi-angle imaging data to obtain the final enhanced image.
  • the ultrasound imaging device uses coherent angle compounding technology to perform coherent angle compounding on multi-angle imaging data to obtain multi-angle compound data, where the multi-angle compound data is composed of multi-angle compound data points, and the ultrasound imaging device will Point-to-point processing is performed on the angle composite data points and corresponding enhancement coefficients to obtain the final enhanced image.
  • the ultrasonic imaging device performs point-to-point processing on multi-angle imaging data points and corresponding enhancement coefficients, and then uses coherent angle compounding technology to perform coherent angle compounding on multi-angle imaging data after performing point-to-point processing to obtain The final enhanced image.
  • the ultrasound imaging device uses enhancement coefficients to perform point-to-point processing on multi-angle imaging data, or the ultrasound imaging device uses enhancement coefficients to perform point-to-point processing on multi-angle composite data, which is specifically selected according to actual conditions. Embodiments of the present invention Not specifically limited.
  • the multi-angle imaging data is l1, l2, ..., ln
  • the enhancement coefficient is a.
  • the ultrasound imaging device multiplies the enhancement coefficient and the multi-angle imaging data point-to-point, that is, a * l1, a * l2, ..., a * ln, and then perform coherent angle recombination on a * l1, a * l2, ..., a * ln, that is, a * l1 + a * l2 + ... + a * ln to obtain an enhanced image.
  • the multi-angle imaging data is l1, l2, ..., ln
  • the enhancement coefficient is a.
  • the ultrasound imaging device performs coherent angle recombination on the multi-angle imaging data, that is, l1 + l2 + ... + ln, and then the enhancement coefficient and ( l1 + l2 + ... + ln) perform point-to-point multiplication, that is, a * (l1 + l2 + ... + ln), to obtain an enhanced image.
  • the point-to-point processing includes point-to-point addition and point-to-point multiplication, which are specifically selected according to actual conditions, and are not specifically limited in the embodiment of the present invention.
  • the enhanced image when the multi-angle imaging data is multi-angle contrast imaging data, the enhanced image is a contrast image; when the multi-angle imaging data is multi-angle tissue imaging data, the enhanced image is a tissue image.
  • the digital gain of the enhanced image is not uniform, digital gain compensation is performed on the enhanced image.
  • the plane wave image to be displayed is obtained, and the ultrasound imaging device displays the plane wave image for the user to use the plane wave. Observation is performed in the image.
  • the ultrasound imaging system utilizes the correlation between multi-angle imaging data to perform the ultrasound imaging process, including:
  • Multi-angle plane wave deflection transmission is adopted, and beam echo data of its echo channel is obtained to obtain multi-angle beam synthesis data.
  • the radiography sequence receiving processing is performed on the multi-angle beam synthesis data, and the ultra-wideband nonlinear contrast imaging technology is used to process the multi-angle beam synthesis data into multi-angle tissue imaging data and / or multi-angle contrast imaging data.
  • AACF calculation is performed on the multi-angle contrast imaging data to obtain AACF of the multi-angle contrast imaging data.
  • FIG. 6 (a) and FIG. 6 (b) are plane wave tissue images of 25 angle coherent recombination of canine liver, wherein FIG. 6 (a) is a plane wave tissue image obtained by using conventional coherent angle recombination technology.
  • Fig. 6 (b) is a plane wave tissue image obtained by the coherent angle compounding technique considering the enhancement coefficient. According to the comparison of the two plane wave tissue images, it can be seen that the near-field cortex of Fig. 6 (b) is clear, while Fig. 6 (a) The horizontal resolution in) is distorted, making the near-field cortex of Fig. 6 (a) unclear.
  • FIG. 7 (a) and FIG. 7 (b) are plane wave contrast images of 25 angle coherent recombination of canine liver, wherein FIG. 7 (a) is a plane wave contrast image obtained by using conventional coherent angle recombination technology.
  • Figure 7 (b) is a plane wave contrast image obtained by the coherent angle recombination technique considering the enhancement coefficient. According to the comparison of the two plane wave contrast images, it can be seen that under the premise of the same noise floor, the subcutaneous tissue texture of Figure 7 (b) It is more obvious, and the noise signal in Fig. 7 (a) is more, which makes the texture of the subcutaneous tissue in Fig. 7 (a) less obvious than that in Fig. 7 (b).
  • the plane wave contrast image improves the signal-to-noise ratio of the plane wave contrast image.
  • the ultrasound imaging data uses the correlation coefficient between adjacent-angle imaging data in the multi-angle imaging data to obtain the correlation with the adjacent-angle imaging data.
  • the correlation is a positive correlation enhancement coefficient.
  • the enhancement coefficient is used to process multi-angle imaging data or multi-angle composite data obtained by coherent angle recombination of multi-angle imaging data to obtain an enhanced image. Because the enhancement coefficient can suppress the low correlation
  • the multi-angle composite data and multi-angle composite data with high correlation have reduced the noise in the resulting enhanced image, thereby improving the contrast resolution of the enhanced image.
  • An embodiment of the present invention provides an ultrasound imaging method, which is applied to an ultrasound imaging device. As shown in FIG. 8, the method may include:
  • the ultrasound imaging device transmits multiple planar beams under multiple deflection angles, and each of the multiple deflection angles corresponds to at least one planar beam.
  • An ultrasound imaging method provided by an embodiment of the present invention is applicable to a scene of ultrasound plane wave imaging that performs coherent angle compounding based on signal amplitude correlation.
  • the ultrasound imaging scene using plane wave emission includes plane wave blood flow, plane wave conventional two-dimensional, plane wave contrast imaging, etc., and is specifically selected according to the actual situation, which is not specifically limited in the embodiment of the present invention.
  • the ultrasound imaging device when the ultrasound imaging device performs plane wave imaging, the ultrasound imaging device sets a plurality of deflection angles in advance.
  • the ultrasound imaging device deflects and emits at least one plane beam toward the measured object at each deflection angle, and the transmission mode is a full array element.
  • the ultrasonic imaging device performs multiple planar beam transmission processes.
  • the method of deflecting and transmitting is electric deflection, and specifically, controlling the firing order of the array elements to achieve the purpose of deflecting and transmitting.
  • the ultrasound imaging device receives a multi-angle echo signal responding to multiple plane beams, and the multi-angle echo signal is an echo signal at multiple deflection angles.
  • the ultrasonic imaging device After the ultrasonic imaging device sends multiple planar beams at multiple deflection angles, the ultrasonic imaging device must receive multi-angle echo signals in response to the multiple planar beams.
  • the ultrasound imaging device after the ultrasound imaging device transmits at least one plane beam at a deflection angle, the ultrasound imaging device receives a set of echo signals.
  • the ultrasound imaging device sends multiple plane beams, the ultrasound imaging device receives Multi-angle echo signals at multiple deflection angles.
  • the ultrasound imaging device processes the multi-angle echo signals into multi-angle imaging data, and the multi-angle imaging data is multi-angle contrast imaging data and / or multi-angle tissue imaging data.
  • the ultrasound imaging device After the ultrasound imaging device receives the multi-angle echo signals in response to multiple plane beams, the ultrasound imaging device must process the multi-angle echo signals into multi-angle imaging data.
  • the ultrasound imaging device performs beam synthesis processing on the multi-angle echo signals to obtain multi-angle beam synthesis data at multiple deflection angles.
  • the ultrasound imaging device uses ultra-wideband non-linear contrast imaging technology to synthesize multi-angle beams.
  • the data is processed into multi-angle tissue imaging data imaging and / or multi-angle contrast imaging data.
  • the ultrasound imaging device uses coherent angle composite technology to perform coherent angle composite on multi-angle imaging data to obtain multi-angle composite data.
  • the ultrasound imaging device After the ultrasonic imaging device processes the multi-angle echo signals into multi-angle imaging data, the ultrasound imaging device must use coherent angle recombination technology to perform coherent angle recombination on the multi-angle imaging data to obtain multi-angle composite data.
  • the ultrasound imaging device uses coherent angle compounding technology to compound imaging data at each deflection angle to obtain multi-angle compound data.
  • the ultrasound imaging device calculates a correlation coefficient between adjacent-angle imaging data in the multi-angle imaging data according to the signal amplitude, and the adjacent-angle imaging data is imaging data corresponding to two adjacent deflection angles among the multiple deflection angles.
  • the ultrasound imaging device After the ultrasound imaging device processes the multi-angle beam synthesis data into multi-angle imaging data, the ultrasound imaging device must calculate the correlation coefficient between adjacent-angle imaging data in the multi-angle imaging data according to the signal amplitude.
  • the ultrasound imaging device obtains the enhancement of the multi-angle imaging data by calculating the enhancement coefficients of the data points at multiple deflection angles. Coefficients. First, the ultrasound imaging device calculates correlation coefficients between adjacent-angle imaging data by sequentially calculating correlation coefficients representing signal amplitude correlations between data points corresponding to the same position at adjacent angles.
  • the ultrasound imaging device determines the correlation degree of the adjacent angle imaging data according to the correlation coefficient and the preset correlation model, and the correlation degree characterizes the correlation of the adjacent angle imaging data.
  • the ultrasound imaging device After the ultrasound imaging device calculates the correlation coefficient between adjacent angle imaging data in the multi-angle imaging data, the ultrasound imaging device needs to determine the correlation degree of the adjacent angle imaging data according to the correlation coefficient and a preset correlation model.
  • a preset correlation coefficient threshold is set in the preset correlation model, and the ultrasound imaging device inputs the correlation coefficient into the preset correlation model to compare the correlation coefficient with the preset correlation coefficient threshold, and according to the comparison, As a result, the correlation coefficient is assigned to the correlation coefficient.
  • the ultrasound imaging device inputs a correlation coefficient into a preset correlation model, and determines the first output result as the correlation degree of the adjacent angle imaging data, wherein the preset correlation model uses the preset correlation coefficient.
  • the threshold is used to calculate the correlation. Specifically, the preset correlation model compares the input correlation coefficient with the preset correlation coefficient threshold, and assigns different correlation values according to the comparison result.
  • the correlation obtained by the preset correlation model represents the correlation between the imaging data of adjacent angles
  • the calculation principle of the preset correlation model may be the correlation between the imaging data of adjacent angles. The higher the output, the lower the correlation, or the higher the correlation between the adjacent angle imaging data, the higher the output correlation.
  • the calculation principle of the preset correlation model is selected according to the actual situation. The embodiment of the present invention does not make specific The limit.
  • the ultrasound imaging device calculates an enhancement coefficient that is positively correlated with the correlation degree according to the correlation degree and a preset enhancement coefficient model.
  • the ultrasound imaging device After the ultrasound imaging device determines the correlation degree of the imaging data at adjacent angles, the ultrasound imaging device needs to calculate the enhancement coefficient with positive correlation according to the correlation degree and the preset enhancement coefficient model.
  • the preset enhancement coefficient model includes two parts: an addition operation and a preset monotonic function.
  • the ultrasound imaging device inputs the correlation degree into a preset enhancement coefficient model. At this time, the ultrasound imaging device adds the correlation degrees to obtain the sum of the correlation degrees, and then performs the correlation degree according to the preset monotonic function. The sum is calculated and the enhancement coefficient is output.
  • the ultrasound imaging device inputs the correlation degree into a preset enhancement coefficient model, and then, in the preset enhancement coefficient model, the ultrasound imaging device adds the correlation degrees to obtain the sum of the correlation degrees, and uses the preset monotony
  • the function calculates the sum of the correlations to obtain the final enhancement coefficient.
  • the monotonicity of the preset monotonic function is positively related to the correlation. For example, when the preset correlation model is calculated based on the The higher the output is, the lower the correlation is.
  • the preset monotonic function is a monotonically decreasing function. When the calculation principle of the preset correlation model is that the higher the correlation between adjacent angle imaging data, the higher the output correlation.
  • the monotonic function is a monotonic increasing function, and is specifically selected according to the actual situation, which is not specifically limited in the embodiment of the present invention.
  • S204 and S205-S207 are parallel steps after S203, and are specifically selected and executed according to actual conditions, which are not specifically limited in the embodiment of the present invention.
  • the ultrasound imaging device uses the enhancement coefficient to perform point-to-point processing on the multi-angle composite data to obtain an enhanced image.
  • the ultrasound imaging device After the ultrasound imaging device calculates an enhancement coefficient with a positive correlation, the ultrasound imaging device needs to perform point-to-point processing on the enhancement coefficient and multi-angle composite data to obtain an enhanced image.
  • the multi-angle composite data is composed of multi-angle composite data points
  • the ultrasound imaging device performs point-to-point processing on the multi-angle composite data points and corresponding enhancement coefficients to obtain a final enhanced image.
  • the point-to-point processing includes point-to-point addition and point-to-point multiplication, which are specifically selected according to actual conditions, and are not specifically limited in the embodiment of the present invention.
  • the enhanced image when the multi-angle imaging data is multi-angle contrast imaging, the enhanced image is a contrast image; when the multi-angle imaging data is multi-angle tissue imaging, the enhanced image is a tissue image.
  • the ultrasound imaging device uses a preset compensation algorithm to perform digital gain compensation on the enhanced image to obtain a plane wave image to be displayed.
  • the ultrasound imaging device uses a preset compensation algorithm to perform digital gain compensation on the enhanced image to obtain a plane wave image to be displayed.
  • digital gain compensation is performed on the enhanced image.
  • the plane wave image to be displayed is obtained, and the ultrasound imaging device displays the plane wave image. For users to observe from the plane wave image.
  • the ultrasound imaging data uses the correlation coefficient between adjacent-angle imaging data in the multi-angle imaging data to obtain the correlation with the adjacent-angle imaging data.
  • the correlation is a positive correlation enhancement coefficient.
  • the enhancement coefficient and the multi-angle composite data obtained by coherent angle recombination of the multi-angle imaging data are subjected to point-to-point processing to obtain an enhanced image. Because the enhancement coefficient can suppress the multi-angle composite with low correlation. Data, multi-angle composite data with high enhancement correlation, so that the noise in the resulting enhanced image is reduced, thereby improving the contrast resolution of the enhanced image.
  • An embodiment of the present invention provides an ultrasound imaging method, an application and an ultrasound imaging device. As shown in FIG. 9, the method may include:
  • the ultrasonic imaging device transmits multiple planar beams under multiple deflection angles, and each of the multiple deflection angles corresponds to at least one planar beam.
  • An ultrasonic imaging method provided by an embodiment of the present invention is applicable to a scene of ultrasonic plane wave imaging that performs coherent angle recombination based on signal phase correlation.
  • the ultrasound imaging device receives a multi-angle echo signal responding to multiple plane beams, and the multi-angle echo signal is an echo signal at multiple deflection angles.
  • the ultrasound imaging device processes the multi-angle echo signal into multi-angle imaging data, and the multi-angle imaging data is multi-angle contrast imaging data and / or multi-angle tissue imaging data.
  • the ultrasound imaging device uses coherent angle composite technology to perform coherent angle composite on multi-angle imaging data to obtain multi-angle composite data.
  • the ultrasound imaging device calculates a correlation coefficient between adjacent-angle imaging data in the multi-angle imaging data according to the signal phase.
  • the adjacent-angle imaging data is imaging data corresponding to two adjacent deflection angles among the multiple deflection angles.
  • the ultrasound imaging device After the ultrasound imaging device processes the multi-angle beam synthesis data into multi-angle imaging data, the ultrasound imaging device must calculate the correlation coefficient between adjacent-angle imaging data in the multi-angle imaging data according to the signal phase.
  • the ultrasound imaging device obtains the enhancement of the multi-angle imaging data by calculating the enhancement coefficients of the data points at multiple deflection angles. Coefficients. First, the ultrasound imaging device calculates correlation coefficients between imaging data of adjacent angles by sequentially calculating correlation coefficients representing signal phase correlation between data points corresponding to the same position at adjacent angles.
  • the ultrasound imaging device determines the correlation degree of the adjacent angle imaging data according to the correlation coefficient and the preset correlation model, and the correlation degree represents the correlation of the adjacent angle imaging data.
  • the ultrasound imaging device calculates an enhancement coefficient that is positively correlated with the correlation degree according to the correlation degree and a preset enhancement coefficient model.
  • S304 and S305-S307 are parallel steps after S303, and are specifically selected and executed according to actual conditions, which are not specifically limited in the embodiment of the present invention.
  • the ultrasound imaging device uses the enhancement coefficient to perform point-to-point processing on the multi-angle composite data to obtain an enhanced image.
  • the ultrasound imaging device uses a preset compensation algorithm to perform digital gain compensation on the enhanced image to obtain a plane wave image to be displayed.
  • An embodiment of the present invention provides an ultrasound imaging method, an application and an ultrasound imaging device. As shown in FIG. 10, the method may include:
  • the ultrasound imaging device transmits multiple planar beams under multiple deflection angles, and each of the multiple deflection angles corresponds to at least one planar beam.
  • An ultrasound imaging method provided by an embodiment of the present invention is applicable to a scene of ultrasound plane wave imaging that performs coherent angle recombination based on signal frequency correlation.
  • the ultrasound imaging device receives a multi-angle echo signal in response to multiple plane beams, and the multi-angle echo signal is an echo signal at multiple deflection angles.
  • the ultrasound imaging device processes the multi-angle echo signal into multi-angle imaging data, and the multi-angle imaging data is multi-angle contrast imaging data and / or multi-angle tissue imaging data.
  • the ultrasound imaging device uses coherent angle composite technology to perform coherent angle composite on multi-angle imaging data to obtain multi-angle composite data.
  • the ultrasound imaging device calculates a correlation coefficient between adjacent-angle imaging data in the multi-angle imaging data according to the signal frequency.
  • the adjacent-angle imaging data is imaging data corresponding to two adjacent deflection angles among the multiple deflection angles.
  • the ultrasound imaging device After the ultrasound imaging device processes the multi-angle beam synthesis data into multi-angle imaging data, the ultrasound imaging device must calculate the correlation coefficient between adjacent-angle imaging data in the multi-angle imaging data according to the signal frequency.
  • the ultrasound imaging device calculates correlation coefficients between imaging data of adjacent angles by sequentially calculating correlation coefficients representing signal frequency correlation between data points at the same positions corresponding to adjacent angles.
  • the ultrasound imaging device determines the correlation degree of the adjacent angle imaging data according to the correlation coefficient and the preset correlation model, and the correlation degree represents the correlation of the adjacent angle imaging data.
  • the ultrasound imaging device calculates an enhancement coefficient that is positively correlated with the correlation degree according to the correlation degree and a preset enhancement coefficient model.
  • S404 and S405-S407 are two parallel steps after S403, and are specifically selected and executed according to actual conditions, which are not specifically limited in the embodiment of the present invention.
  • the ultrasound imaging device uses the enhancement coefficient to perform point-to-point processing on the multi-angle composite data to obtain an enhanced image.
  • the ultrasound imaging device uses a preset compensation algorithm to perform digital gain compensation on the enhanced image to obtain a plane wave image to be displayed.
  • An embodiment of the present invention provides an ultrasonic imaging method, an application and an ultrasonic imaging device. As shown in FIG. 11, the method may include:
  • the ultrasonic imaging device transmits multiple planar beams under multiple deflection angles, and each of the multiple deflection angles corresponds to at least one planar beam.
  • An ultrasonic imaging method provided by an embodiment of the present invention is applicable to a scene of ultrasonic plane wave imaging based on coherent angle composite technology.
  • the ultrasound imaging device receives a multi-angle echo signal responding to multiple plane beams, and the multi-angle echo signal is an echo signal at multiple deflection angles.
  • the ultrasound imaging device processes the multi-angle echo signal into multi-angle imaging data, and the multi-angle imaging data is multi-angle contrast imaging data and / or multi-angle tissue imaging data.
  • the ultrasound imaging device calculates a correlation coefficient between adjacent-angle imaging data in the multi-angle imaging data based on the signal characteristics.
  • the adjacent-angle imaging data is imaging data corresponding to two adjacent deflection angles among the multiple deflection angles.
  • the ultrasound imaging device determines the correlation degree of the imaging data of the adjacent angles according to the correlation coefficient and the preset correlation model, and the correlation degree represents the correlation of the imaging data of the adjacent angles.
  • the ultrasound imaging device calculates an enhancement coefficient that is positively correlated with the correlation degree according to the correlation degree and a preset enhancement coefficient model.
  • the ultrasound imaging device uses the enhancement coefficient to perform point-to-point processing on the multi-angle imaging data.
  • the ultrasound imaging device uses the enhancement coefficient to perform point-to-point processing on the multi-angle imaging data.
  • the ultrasound imaging device uses the enhancement coefficient to perform point-to-point processing on the multi-angle imaging data, respectively.
  • the point-to-point processing includes point-to-point addition and point-to-point multiplication, which are specifically selected according to actual conditions, and are not specifically limited in the embodiment of the present invention.
  • the ultrasound imaging device uses coherent angle recombination technology to perform coherent angle recombination on multi-angle imaging data after point-to-point processing to obtain an enhanced image.
  • the ultrasound imaging device uses the enhancement coefficient to perform point-to-point processing on the multi-angle imaging data
  • the ultrasound imaging device needs to use coherent angle compounding technology to perform coherent angle compounding on the multi-angle imaging data after the point-to-point processing to obtain an enhanced image.
  • the ultrasound imaging device uses coherent angle recombination technology to perform coherent angle recombination on multi-angle imaging data after point-to-point processing to finally obtain an enhanced image.
  • the ultrasound imaging device uses a preset compensation algorithm to perform digital gain compensation on the enhanced image to obtain a plane wave image to be displayed.
  • the ultrasound imaging data uses the correlation coefficient between adjacent-angle imaging data in the multi-angle imaging data to obtain the correlation with the adjacent-angle imaging data.
  • the correlation is a positive correlation enhancement coefficient.
  • the enhancement coefficient is used to perform point-to-point processing on the multi-angle imaging data, and then the multi-angle imaging data after the point-to-point processing is coherently angle-combined to obtain an enhanced image. Because the correlation coefficient of the enhancement coefficient can suppress the low correlation
  • the multi-angle composite data and multi-angle composite data with high correlation have reduced the noise in the resulting enhanced image, thereby improving the contrast resolution of the enhanced image.
  • FIG. 12 is a schematic block diagram of a structure of an ultrasound imaging apparatus 1 according to an embodiment of the present invention.
  • the ultrasound imaging apparatus 1 may include a probe 100, a transmitting circuit 101, a transmitting / receiving selection switch 102, a receiving circuit 103, a beam combining circuit 104, a processor 105, and a display 106.
  • the transmitting circuit 101 can excite the probe 100 to transmit a plurality of planar beams to a target object.
  • the receiving circuit 103 can receive an ultrasonic echo returned from the target object through the probe 100, thereby obtaining a multi-angle echo signal.
  • the multi-angle echo signal is sent to the processor 105 after being subjected to beam combining processing by the beam combining circuit 104.
  • the processor 105 processes the ultrasound echo signal to obtain an ultrasound image of a target object or an ultrasound image of an interventional object.
  • the ultrasound image obtained by the processor 105 may be stored in the memory 107. These ultrasound images can be displayed on the display 106.
  • the processor 105 specifically performs the following steps: during the plane wave imaging process, acquiring multi-angle imaging data, where the multi-angle imaging data is imaging data at multiple deflection angles;
  • an enhancement coefficient that is positively correlated with the correlation of the adjacent-angle imaging data according to the correlation coefficient, and the enhancement coefficient is a coefficient corresponding to the multi-angle imaging data;
  • the enhanced coefficient is used to process multi-angle composite data or the multi-angle imaging data to obtain an enhanced image.
  • the multi-angle composite data is data obtained by coherently angle-combining the multi-angle imaging data.
  • the processor 105 is further configured to determine a correlation degree of the adjacent-angle imaging data according to the correlation coefficient and a preset correlation model, where the correlation degree characterizes an image of the adjacent-angle imaging data. Correlation; according to the correlation and a preset enhancement coefficient model, calculating the enhancement coefficient that is positively correlated with the correlation.
  • the processor 105 is further configured to input the correlation coefficient into the preset correlation model to obtain a first output result; and determine the first output result as the correlation degree.
  • the preset enhancement coefficient model includes two parts of an addition operation and a preset monotonic function, and the monotonicity of the preset monotonic function is positively related to the correlation.
  • the processor 105 is further configured to convert The correlation is input into the preset enhancement coefficient model; the correlation is performed by the addition operation to obtain a total correlation; and the correlation is calculated according to the preset monotonic function to obtain a first Two output results; determining the second output result as the enhancement coefficient.
  • the transmitting circuit 101 is configured to transmit multiple planar beams under the multiple deflection angles, and each of the multiple deflection angles corresponds to at least one planar beam;
  • the receiving circuit 103 is configured to receive a multi-angle echo signal in response to the multiple plane beams, where the multi-angle echo signal is an echo signal at the multiple deflection angles;
  • the processor 105 is configured to process the multi-angle echo signal into the multi-angle imaging data, where the multi-angle imaging data is multi-angle contrast imaging data and / or multi-angle tissue imaging data.
  • the processor 105 is further configured to use coherent angle composite technology to perform coherent angle composite on the multi-angle imaging data to obtain the multi-angle composite data; and use the enhancement coefficient to composite the multi-angle composite data.
  • the data is subjected to point-to-point processing to obtain the enhanced image.
  • the processor 105 is further configured to use the enhancement coefficient to perform point-to-point processing on the multi-angle imaging data; and use coherent angle compounding technology to perform coherent angle compounding on the multi-angle imaging data after point-to-point processing. To obtain the enhanced image.
  • the point-to-point processing includes any one of point-to-point addition or point-to-point multiplication.
  • the signal characteristics include at least one of a signal amplitude, a signal phase, and a signal frequency.
  • the processor 105 is further configured to perform digital gain compensation on the enhanced image using a preset compensation algorithm to obtain a plane wave image to be displayed.
  • the functional modules in this embodiment may be integrated into one processing unit, or each unit may exist separately physically, or two or more units may be integrated into one unit.
  • the above integrated unit may be implemented in the form of hardware or in the form of software functional modules.
  • the integrated unit is implemented in the form of a software functional module and is not sold or used as an independent product, it may be stored in a computer-readable storage medium.
  • the technical solution of the embodiment of the present invention is essentially In other words, the part that contributes to the existing technology or all or part of the technical solution may be embodied in the form of a software product.
  • the computer software product is stored in a storage medium and includes several instructions for making a computer device ( It may be a personal computer, a server, or a network device) or a processor (processor) to perform all or part of the steps of the method described in the embodiment of the present invention.
  • the foregoing storage medium includes various media that can store program codes, such as a U disk, a mobile hard disk, a ROM, a RAM, a magnetic disk, or an optical disk.
  • An embodiment of the present invention provides a computer-readable storage medium on which a computer program is stored, which is applied to the ultrasound imaging apparatus 1.
  • the computer program is executed by the processor 105, the foregoing ultrasound imaging method is implemented.
  • the methods in the above embodiments can be implemented by means of software plus a necessary universal hardware platform, and of course, also by hardware, but in many cases the former is better.
  • Implementation Based on such an understanding, the technical solution of the present invention in essence or part that contributes to the existing technology can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, magnetic disk, The optical disc) includes several instructions for causing a terminal (which may be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) to execute the methods described in the embodiments of the present invention.
  • a terminal which may be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.
  • the ultrasound imaging data uses the correlation coefficient between adjacent angle imaging data in the multi-angle imaging data to obtain imaging with adjacent angles.
  • the correlation coefficient of the data is a positive correlation enhancement coefficient.
  • the enhancement coefficient is used to process the multi-angle imaging data or multi-angle imaging data obtained by coherent angle recombination to process the multi-angle composite data to obtain an enhanced image.
  • the correlation can be suppressed by the enhancement coefficient. Low-angle multi-angle composite data, enhanced multi-angle multi-angle composite data with high correlation, reduce the noise in the resulting enhanced image, and then improve the contrast resolution of the enhanced image.

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Abstract

一种超声成像方法及装置、计算机可读存储介质。该方法包括：在平面波成像过程中，获取多角度成像数据，多角度成像数据为多个偏转角度下的成像数据(S101)；基于信号特征，计算多角度成像数据中相邻角度成像数据之间的相关系数，相邻角度成像数据为多个偏转角度中相邻两个偏转角度对应的成像数据(S102)；根据相关系数，得到与相邻角度成像数据的相关性正相关的增强系数，增强系数为多角度成像数据对应的系数(S103)；利用增强系数，对多角度复合数据或多角度成像数据进行处理，得到增强图像(S104)。该方法能减少复合图像中的噪声，提高复合图像的对比分辨率。

Description

一种超声成像方法及装置、计算机可读存储介质 技术领域
本发明实施例涉及超声成像领域，尤其涉及一种超声成像方法及装置、计算机可读存储介质。
背景技术
近年来，由于超声平面波技术相较于传统聚焦成像技术而言，拥有发射次数少，成像帧率高等优点，使得超声平面波技术在造影、弹性、常规二维及彩色血流等成像模式下均有广泛应用。与此同时，超声平面波技术和传统聚焦成像技术在发射方式上的差异，导致平面波图像的穿透力不足和横向分辨率差，为了解决平面波图像的穿透力不足以及横向分辨率差的问题，相干角度复合技术成为了超声平面波成像必不可少的处理环节，如图1所示，在角度#1：发射偏转-10度、角度#2：发射偏转0度、和角度#3：发射偏转10度、上分别发射平面波，返回组成成像目标的回波信号，并将回波信号进行波束合成处理，得到角度#1的波束合成数据、角度#2的波束合成数据和角度#3的波束合成数据，最后将三组波束合成数据进行叠加，输出相干角度复合数据，即发射不同偏转角度的平面波，采集各次平面波发射的回波信号进行波束合成，然后将多角度下的波束合成数据进行叠加，得到复合图像，由于各个角度下的有用信号相关而噪声独立，使得相干角度复合技术可以提高平面波图像的穿透力及横向分辨率。
然而，回波信号中存在噪声和杂波，当噪声和杂波在回波信号中的占比大于有用信号在回波信号中的占比时，各个角度下的有用信号之间的相关度就会降低，此时直接将多角度下的波束合成数据进行叠加，会导致复合图像中的噪声增加，从而降低了复合图像的对比分辨率。
发明内容
为解决上述技术问题，本发明实施例期望提供一种超声成像方法及装置、计算机可读存储介质，能够减少复合图像中的噪声，提高复合图像的对比分辨率。
本发明实施例的技术方案可以如下实现：
本发明实施例提供一种超声成像方法，应用于超声成像装置，所述方法包括：
在平面波成像过程中，获取多角度成像数据，所述多角度成像数据为所述多个偏转角度下的成像数据；
基于信号特征，计算所述多角度成像数据中相邻角度成像数据之间的相关系数，所述相邻角度成像数据为所述多个偏转角度中相邻两个偏转角度对应的成像数据；
根据所述相关系数，得到与所述相邻角度成像数据的相关性正相关的增强系数，所述增强系数为所述多角度成像数据对应的系数；
利用所述增强系数，对多角度复合数据或所述多角度成像数据进行处理，得到增强图像，所述多角度复合数据为对所述多角度成像数据进行相干角度复合后的数据。
在上述方法中，所述根据所述相关系数，得到与所述相邻角度成像数据的相关性正相关的增强系数，包括：
根据所述相关系数和预设相关性模型，确定出所述相邻角度成像数据的相关度，所述相关度表征所述相邻角度成像数据的相关性；
根据所述相关度和预设增强系数模型，计算出与所述相关度正相关的所述增强系数。
在上述方法中，所述根据所述相关系数和预设相关性模型，确定出所述相邻角度成像数据的相关度，包括：
将所述相关系数输入所述预设相关性模型中，获取第一输出结果；
将所述第一输出结果确定为所述相关度。
在上述方法中，所述预设增强系数模型包括相加运算和预设单调函数这两部分，所述预设单调函数的单调性与所述相关度正相关，所述根据所述相关度和预设增强系数模型，计算出与所述相关度正相关的所述增强系数，包括：
将所述相关度输入所述预设增强系数模型中；
将所述相关度进行所述相加运算，得到相关度总和；
根据所述预设单调函数，对所述相关度总和进行计算，得到第二输出结果；
将所述第二输出结果确定为所述增强系数。
在上述方法中，所述获取多角度成像数据，包括：
在所述多个偏转角度下，发射多个平面波束，所述多个偏转角度中的每一个偏转角度对应至少一个平面波束；
接收响应所述多个平面波束的多角度回波信号，所述多角度回波信号为所述多个偏转角度下的回波信号；
将所述多角度回波信号处理成所述多角度成像数据，所述多角度成像数据为多角度造影成像数据和/或多角度组织成像数据。
在上述方法中，所述获取多角度成像数据之后，所述方法还包括：
采用相干角度复合技术，对所述多角度成像数据进行相干角度复合，得到所述多角度复合数据；
相应的，所述利用所述增强系数，对多角度复合数据或所述多角度成像数据进行处理，得到增强图像，包括：
利用所述增强系数，对所述多角度复合数据进行点对点处理，得到所述增强图像。
在上述方法中，所述利用所述增强系数，对多角度复合数据或所述多 角度成像数据进行处理，得到增强图像，包括：
利用所述增强系数，对所述多角度成像数据进行点对点处理；
采用相干角度复合技术，对点对点处理之后的所述多角度成像数据进行相干角度复合，得到所述增强图像。
在上述方法中，所述点对点处理包括：点对点相加或点对点相乘中的任意一种。
在上述方法中，所述信号特征包括：信号幅度、信号相位和信号频率中的至少一种。
在上述方法中，所述利用所述增强系数，对多角度复合数据或所述多角度成像数据进行处理，得到增强图像之后，所述方法还包括：
利用预设补偿算法，对所述增强图像进行数字增益补偿，得到待显示的平面波图像。
本发明实施例提供一种超声成像装置，所述超声成像装置包括：
探头；
发射电路，所述发射电路激励所述探头向目标对象发射多个平面波束；
接收电路，所述接收电路通过所述探头接收从所述目标对象返回的超声回波以获得多角度回波信号；
处理器，所述处理器处理所述多角度回波信号以获得所述目标对象的增强图像；
显示器，所述显示器显示所述增强图像；
其中，所述处理器还执行如下步骤：
在平面波成像过程中，获取多角度成像数据，所述多角度成像数据为多个偏转角度下的成像数据；
基于信号特征，计算所述多角度成像数据中相邻角度成像数据之间的相关系数，所述相邻角度成像数据为所述多个偏转角度中相邻两个偏转角度对应的成像数据；
根据所述相关系数，得到与所述相邻角度成像数据的相关性正相关的增强系数，所述增强系数为所述多角度成像数据对应的系数；
利用所述增强系数，对多角度复合数据或所述多角度成像数据进行处理，得到增强图像，所述多角度复合数据为对所述多角度成像数据进行相干角度复合后的数据。
在上述超声成像装置中，所述处理器，还用于根据所述相关系数和预设相关性模型，确定出所述相邻角度成像数据的相关度，所述相关度表征所述相邻角度成像数据的相关性；根据所述相关度和预设增强系数模型，计算出与所述相关度正相关的所述增强系数。
在上述超声成像装置中，所述处理器，还用于将所述相关系数输入所述预设相关性模型中，获取第一输出结果；将所述第一输出结果确定为所述相关度。
在上述超声成像装置中，所述预设增强系数模型包括相加运算和预设单调函数这两部分，所述预设单调函数的单调性与所述相关度正相关，
所述处理器，还用于将所述相关度输入所述预设增强系数模型中；将所述相关度进行所述相加运算，得到相关度总和；根据所述预设单调函数，对所述相关度总和进行计算，得到第二输出结果；将所述第二输出结果确定为所述增强系数。
在上述超声成像装置中，所述发射电路，用于在所述多个偏转角度下，发射多个平面波束，所述多个偏转角度中的每一个偏转角度对应至少一个平面波束；
所述接收电路，用于接收响应所述多个平面波束的多角度回波信号，所述多角度回波信号为所述多个偏转角度下的回波信号；
所述处理器，用于将所述多角度回波信号处理成所述多角度成像数据，所述多角度成像数据为多角度造影成像数据和/或多角度组织成像数据。
在上述超声成像装置中，所述处理器，还用于采用相干角度复合技术， 对所述多角度成像数据进行相干角度复合，得到所述多角度复合数据；利用所述增强系数，对所述多角度复合数据进行点对点处理，得到所述增强图像。
在上述超声成像装置中，所述处理器，还用于利用所述增强系数，对所述多角度成像数据进行点对点处理；采用相干角度复合技术，对点对点处理之后的所述多角度成像数据进行相干角度复合，得到所述增强图像。
在上述超声成像装置中，所述点对点处理包括：点对点相加或点对点相乘中的任意一种。
在上述超声成像装置中，所述信号特征包括：信号幅度、信号相位和信号频率中的至少一种。
在上述超声成像装置中，所述处理器，还用于利用预设补偿算法，对所述增强图像进行数字增益补偿，得到待显示的平面波图像。
本发明实施例提供一种计算机可读存储介质，其上存储有计算机程序，应用于超声成像装置，该计算机程序被处理器执行时实现如上述任一项超声成像方法。
本发明实施例提供一种超声成像方法及装置、计算机可读存储介质，该方法包括：在平面波成像过程中，获取多角度成像数据，多角度成像数据为多个偏转角度下的成像数据；基于信号特征，计算多角度成像数据中相邻角度成像数据之间的相关系数，相邻角度成像数据为多个偏转角度中相邻两个偏转角度对应的成像数据；根据相关系数，得到与相邻角度成像数据的相关性正相关的增强系数，增强系数为多角度成像数据对应的系数；利用增强系数，对多角度复合数据或多角度成像数据进行处理，得到增强图像，多角度复合数据为对多角度成像数据进行相干角度复合后的数据。采用上述方案，超声成像装置获取到多个偏转角度下的多角度成像数据之后，超声成像数据利用多角度成像数据中相邻角度成像数据之间的相关系数，得到与相邻角度成像数据的相关性正相关的增强系数，最后利用增强 系数，对多角度成像数据或者对多角度成像数据进行相干角度复合后得到的多角度复合数据进行处理，得到增强图像，由于增强系数能够抑制相关性低的多角度复合数据，增强相关性高的多角度复合数据，使得最终得到的增强图像中的噪声降低，进而提高了增强图像的对比分辨率。
附图说明
图1为本发明实施例提供的一种常规相干角度复合技术的示意图；
图2(a)为本发明实施例提供的一种传统聚焦成像技术的信号收发图；
图2(b)为本发明实施例提供的一种平面波技术的信号收发图；
图3(a)为本发明实施例提供的一种聚焦发射声场的示意图；
图3(b)为本发明实施例提供的一种平面波发射声场的示意图；
图4为本发明实施例提供的一种超声成像方法的流程图一；
图5为本发明实施例提供的一种示例性的超声成像方法的流程示意图；
图6(a)为本发明实施例提供的一种示例性的利用常规相干角度复合技术得到的平面波组织图像图；
图6(b)为本发明实施例提供的一种示例性的利用考虑了增强系数的相干角度复合技术得到的平面波组织图像图；
图7(a)为本发明实施例提供的一种示例性的利用常规相干角度复合技术得到的平面波造影图像图；
图7(b)为本发明实施例提供的一种示例性的利用考虑了增强系数的相干角度复合技术得到的平面波造影图像图；
图8为本发明实施例提供的一种基于信号幅度相关性的超声成像方法的流程图；
图9为本发明实施例提供的一种基于信号相位相关性的超声成像方法的流程图；
图10为本发明实施例提供的一种基于信号频率相关性的超声成像方法 的流程图；
图11为本发明实施例提供的一种超声成像方法的流程图二；
图12为本发明实施例提供的一种超声成像装置的结构示意图。
具体实施方式
为了能够更加详尽地了解本发明实施例的特点与技术内容，下面结合附图对本发明实施例的实现进行详细阐述，所附附图仅供参考说明之用，并非用来限定本发明实施例。
需要说明的是，当采用传统聚焦成像技术时，绝大部分商用超声成像装置的帧率极限为30帧/秒，这对心脏等快速运动器官的实时诊断极为不利。如何在不损失图像质量的前提下尽可能的提升帧率，就成为了超声成像领域的技术难点之一。由此，引入了超声平面波技术，假设一帧图像有N条接收波束，如图2(a)所示，当利用传统单波束聚焦成像技术形成，超声成像装置需要发射#1、#2、…、#N条发射波束；而如图2(b)所示，超声平面波技术只需发射一次全阵元发射激励即可进行全域接收，得到一帧图像，使得利用超声平面波技术的发射次数为传统单波束聚焦成像技术的1/N，即便传统聚焦成像使用双波束、四波束甚至八波束等并行多波束处理方法提高帧率，平面波在减少发射次数方面的优势仍然巨大，最终体现为利用超声平面波技术使得成像帧率大幅提升，由此，超声平面波技术在造影、弹性、常规二维及彩色血流等成像模式下均有广泛应用。
然而，超声平面波技术和传统聚焦成像技术在发射次数上的差异，造成了在发射声场方面的不同，具体的，如图3(a)和图3(b)所示，平面波的发射声场强度只有在1-2cm范围内与传统聚焦发射相当，随着发射深度的增强，平面波的发射声场强度逐渐变弱，使得最终得到的平面波图像穿透力不足；且平面波无发射聚焦，仅在接收端进行波束合成，导致平面波图像的穿透力不足和横向分辨率差，故而，引入相干角度复合技术来解 决平面波成像中穿透力不足和横向分辨率差的问题。
基于相干角度复合技术提出下述实施例。
本发明实施例提供一种超声成像方法，应用于超声成像装置，如图4所示，该方法可以包括：
S101、在平面波成像过程中，获取多角度成像数据，多角度成像数据为多个偏转角度下的成像数据。
本发明实施例提供的一种超声成像方法适用于基于相干角度复合技术的超声平面波成像的场景下。
本发明实施例中，采用平面波发射的超声成像场景包括平面波血流、平面波常规二维、平面波造影成像等，具体的根据实际情况进行选择，本发明实施例不做具体的限定。
本发明实施例中，在超声成像装置进行平面波成像时，超声成像装置预先设置多个偏转角度，超声成像装置在每个偏转角度向被测对象偏转发射至少一个平面波束，发射方式为全阵元非聚焦式发射，超声成像装置进行多次平面波束的发射过程，且每一次都会接收到响应平面波束的一组回波信号，最终超声成像装置接收到多个偏转角度下的多角度回波信号，该多角度回波信号能够得到多个偏转角度下的图像信息。
本发明实施例中，多角度成像数据为多角度造影成像数据和/或多角度组织成像数据。
本发明实施例中，超声成像装置对多角度回波信号进行波束合成处理，得到多个偏转角度下的多角度波束合成数据。超声成像装置利用超宽带非线性造影成像技术将多角度波束合成数据处理成多角度组织成像数据和/或多角度造影成像数据。
进一步地，当超声成像装置获取到多角度组织成像数据和/或多角度造影成像数据之后，超声成像装置就要分别对多角度组织成像数据和/或多角度造影成像数据进行超声平面波成像过程，从而得到组织图像和/或造影图 像。
进一步地，当超声成像装置获取到多角度成像数据之后，超声成像装置利用相干角度复合技术，对多角度成像数据进行相干角度的复合，得到复合后的多角度复合数据，其中，多角度复合数据用于与之后计算得到的增强系数进行点对点处理，得到增强图像。
S102、基于信号特征，计算多角度成像数据中相邻角度成像数据之间的相关系数，相邻角度成像数据为多个偏转角度中相邻两个偏转角度对应的成像数据。
当超声成像装置在平面波成像过程中，获取多角度成像数据之后，超声成像装置就要基于信号特征，计算多角度成像数据中相邻角度成像数据之间的相关系数了。
需要说明的是，由于多角度成像数据是由多个偏转角度下的数据点组成的，因此，超声成像装置通过计算多个偏转角度下的数据点的增强系数，来得到多角度成像数据的增强系数，首先，超声成像装置通过依次计算相邻角度下对应的相同位置的数据点之间的相关系数，来计算相邻角度成像数据之间的相关系数。
本发明实施例中，信号特征包括信号幅度、信号相位和信号频率等，具体的根据实际情况进行选择，本发明实施例不做具体的限定。
S103、根据相关系数，得到与相邻角度成像数据的相关性正相关的增强系数，增强系数为多角度成像数据对应的系数。
当超声成像装置计算出相邻角度成像数据之间的相关系数之后，超声成像装置就要根据相关系数，得到与相邻角度成像数据的相关性正相关的增强系数了。
本发明实施例中，超声成像装置将相关系数输入预设相关性模型中，并将第一输出结果确定为相邻角度成像数据的相关度，其中，预设相关性模型是利用预设相关系数阈值来进行相关度的计算的，具体的，预设相关 性模型将输入的相关系数和预设相关系数阈值进行比较，并根据比较结果分配不同的相关度值。
本发明实施例中，通过预设相关性模型得到的相关度表征了相邻角度成像数据之间的相关性，其中，预设相关性模型的计算原则可以是相邻角度成像数据的相关性越高则输出的相关度越低、或者相邻角度成像数据的相关性越高则输出的相关度越高，具体的根据实际情况选择预设相关性模型的计算原则，本发明实施例不做具体的限定。
本发明实施例中，超声成像装置在确定出相关度之后，根据相关度和预设增强系数模型，计算出与相关性正相关的增强系数。
本发明实施例中，超声成像装置将相关度输入预设增强系数模型中，之后，在预设增强系数模型中，超声成像装置将相关度进行相加运算，得到相关度总和，利用预设单调函数对相关度总和进行计算，得到最终的增强系数，其中，预设单调函数的单调性与相关度正相关，例如，当预设相关性模型的计算原则是相邻角度成像数据的相关性越高则输出的相关度越低时，预设单调函数为单调递减函数；当预设相关性模型的计算原则是相邻角度成像数据的相关性越高则输出的相关度越高时，预设单调函数为单调递增函数，具体的根据实际情况进行选择，本发明实施例不做具体的限定。
示例性的，超声成像装置计算的增强系数为相邻角度相关因子(AACF，Adjacent Angle Correlation Factor)，AACF的详细计算方法如下：
令s m,n[k]表示第k个角度下、纵向第m个数据点和横向第n根接收线处的成像数据，第一步，计算相邻角度下的s m,n[k]之间的相关系数：
Figure PCTCN2018098664-appb-000001
其中，cov(·)和var(·)分别表示协方差和方差运算；K为相干角度复合 的次数，得到K-1维相关系数矢量ρ m,n＝[ρ m,n,1,ρ m,n,2,...,ρ m,n,K-1]，ρ m,n即为相邻角度成像数据之间的相关系数的集合。
第二步，对ρ m,n中各元素进行如下操作：
Figure PCTCN2018098664-appb-000002
公式(2)为预设相关性模型的公式，comp(ρ m,n,k,β)即为相邻角度成像数据之间的相关度，其中，comp(·)表示数值比较运算，β为可调节的相关系数阈值，其值域为(0,1)，上述预设相关性模型表示，当相关系数大于预设相关系数阈值时，相邻角度成像数据之间的相关度为0，当相关系数小于预设相关系数阈值时，相邻角度成像数据之间的相关度为1，此处预设相关性模型的计算原则是相邻角度成像数据的相关性高则输出的相关度低。
第三步，计算纵向第m个点和横向第n根接收线处的AACF m,n：
Figure PCTCN2018098664-appb-000003
AACF m,n即为多角度成像数据的增强系数，其中，sum{·}表示求和运算。
需要说明的是，公式(3)中的预设单调函数为单调递减函数，且根据公式(2)可以得出sum{comp(ρ m,n,β)}∈[0,K-1]，根据公式(3)可以得到AACF m,n的取值范围是(0,1]。综合考虑公式(2)和公式(3)，当相邻角度成像数据间的相关性较高时，sum{comp(ρ m,n,β)}的值接近于0，AACF m,n则趋向于1；反之，sum{comp(ρ m,n,β)}的值接近于K-1，AACF m,n趋向于0。
可选的，当公式(2)中赋值结果相反时，公式(3)中的预设单调函数为单调递增函数，具体的根据实际情况进行选择，本发明实施例不做具体的限定。
可以理解的是，AACF能够衡量多个相干角度下的数据点的复合质量， AACF越接近于1，说明此数据点的复合质量越高，应予以保留甚至增强；AACF越接近于0，说明此数据点的复合质量越差，应对其进行压制。
S104、利用增强系数，对多角度复合数据或多角度成像数据进行处理，得到增强图像，多角度复合数据为对多角度成像数据进行相干角度复合后的数据。
当超声成像装置计算出增强系数之后，超声成像装置就要利用增强系数，对多角度成像数据或多角度成像数据进行相干角度复合后的多角度复合数据进行处理，得到最终的增强图像了。
本发明实施例中，超声成像装置采用相干角度复合技术，对多角度成像数据进行相干角度复合，得到多角度复合数据，其中，多角度复合数据由多角度复合数据点组成，超声成像装置将多角度复合数据点与对应的增强系数进行点对点处理，得到最终的增强图像。
本发明实施例中，超声成像装置将多角度成像数据点与对应的增强系数进行点对点处理，之后，再采用相干角度复合技术，对进行了点对点处理之后的多角度成像数据进行相干角度复合，得到最终的增强图像。
需要说明的是，超声成像装置利用增强系数，对多角度成像数据进行点对点处理、或者超声成像装置利用增强系数，对多角度复合数据进行点对点处理，具体的根据实际情况进行选择，本发明实施例不做具体的限定。
示例性的，多角度成像数据为l1、l2、…、ln，增强系数为a，超声成像装置将增强系数与多角度成像数据进行点对点相乘，即a*l1、a*l2、…、a*ln，之后再对a*l1、a*l2、…、a*ln进行相干角度复合，即a*l1+a*l2+…+a*ln，得到增强图像。
示例性的，多角度成像数据为l1、l2、…、ln，增强系数为a，超声成像装置对多角度成像数据进行相干角度复合，即l1+l2+…+ln，之后再将增强系数与(l1+l2+…+ln)进行点对点相乘，即a*(l1+l2+…+ln)，得到增强图像。
本发明实施例中，点对点处理包括点对点相加、点对点相乘，具体的根据实际情况进行选择，本发明实施例不做具体的限定。
本发明实施例中，当多角度成像数据为多角度造影成像数据时，增强图像为造影图像；当多角度成像数据多角度组织成像数据时，增强图像为组织图像。
进一步地，由于增强图像会出现数字增益不均匀的情况，故，对增强图像进行数字增益补偿，此时，得到了待显示的平面波图像，超声成像装置对平面波图像进行显示，以供用户从平面波图像中进行观察操作。
示例性的，如图5所示，超声成像系统利用多角度成像数据之间的相关性进行超声成像的方法流程包括：
1、采用多角度平面波偏转发射，并对其回波通道数据进行波束合成，得到多角度波束合成数据。
2、对多角度波束合成数据进行造影序列接收处理，利用超宽带非线性造影成像技术将多角度波束合成数据处理为多角度组织成像数据和/或多角度造影成像数据。
3、当将多角度波束合成数据处理为多角度组织成像数据时，对多角度组织成像数据进行AACF计算，得到多角度组织成像数据的AACF。
4、利用相干角度复合技术，对所述多角度组织成像数据进行相干角度复合，得到多角度组织复合数据。
5、将AACF和多角度组织复合数据进行点对点处理，得到组织图像。
6、对组织图像进行数字增益补偿。
7、当将多角度波束合成数据处理为多角度造影成像数据时，对多角度造影成像数据进行AACF计算，得到多角度造影成像数据的AACF。
8、利用相干角度复合技术，对所述多角度造影成像数据进行相干角度复合，得到多角度造影复合数据。
9、将AACF和多角度造影复合数据进行点对点处理，得到造影图像。
10、对造影图像进行数字增益补偿。
示例性的，图6(a)和图6(b)为对犬肝脏进行25个角度相干复合的平面波组织图像，其中，图6(a)为利用常规相干角度复合技术得到的平面波组织图像，图6(b)为考虑了增强系数的相干角度复合技术得到的平面波组织图像，根据两幅平面波组织图像的对比可以看出，图6(b)的近场皮质层清晰，而图6(a)中的横向分辨率失真，使得图6(a)的近场皮质层不清晰。
示例性的，图7(a)和图7(b)为对犬肝脏进行25个角度相干复合的平面波造影图像，其中，图7(a)为利用常规相干角度复合技术得到的平面波造影图像，图7(b)为考虑了增强系数的相干角度复合技术得到的平面波造影图像，根据两幅平面波造影图像的对比可以看出，在噪底相同的前提下，图7(b)的皮下组织纹理更加明显，而图7(a)中的噪声信号较多，使得图7(a)的皮下组织纹理较图7(b)而言不明显，故，考虑了增强系数的相干角度复合技术得到的平面波造影图像提升了平面波造影图像的信噪比。
可以理解的是，超声成像装置获取到多个偏转角度下的多角度成像数据之后，超声成像数据利用多角度成像数据中相邻角度成像数据之间的相关系数，得到与相邻角度成像数据的相关性正相关的增强系数，最后利用增强系数，对多角度成像数据或者多角度成像数据进行相干角度复合后得到的多角度复合数据进行处理，得到增强图像，由于增强系数能够抑制的相关性低的多角度复合数据，增强相关性高的多角度复合数据，使得最终得到的增强图像中的噪声降低，进而提高了增强图像的对比分辨率。
本发明实施例提供一种超声成像方法，应用于超声成像装置，如图8所示，该方法可以包括：
S201、超声成像装置在多个偏转角度下，发射多个平面波束，多个偏转角度中的每一个偏转角度对应至少一个平面波束。
本发明实施例提供的一种超声成像方法适用于基于信号幅度相关性进行相干角度复合的超声平面波成像的场景下。
本发明实施例中，采用平面波发射的超声成像场景包括平面波血流、平面波常规二维、平面波造影成像等，具体的根据实际情况进行选择，本发明实施例不做具体的限定。
本发明实施例中，在超声成像装置进行平面波成像时，超声成像装置预先设置多个偏转角度，超声成像装置在每个偏转角度向被测对象偏转发射至少一个平面波束，发射方式为全阵元非聚焦式发射，超声成像装置进行多次平面波束的发射过程。
本发明实施例中，偏转发射的方法是电偏转，具体的就是控制阵元的发射先后顺序，来达到偏转发射的目的。
S202、超声成像装置接收响应多个平面波束的多角度回波信号，多角度回波信号为多个偏转角度下的回波信号。
当超声成像装置在多个偏转角度下发送多个平面波束之后，超声成像装置就要接收响应多个平面波束的多角度回波信号了。
本发明实施例中，超声成像装置在一个偏转角度下发射至少一个平面波束之后，超声成像装置会接收到一组回波信号，在超声成像装置发送了多个平面波束时，超声成像装置接收到多个偏转角度下的多角度回波信号。
S203、超声成像装置将多角度回波信号处理成多角度成像数据，多角度成像数据为多角度造影成像数据和/或多角度组织成像数据。
当超声成像装置接收到响应多个平面波束的多角度回波信号之后，超声成像装置就要将多角度回波信号处理成多角度成像数据了。
本发明实施例中，超声成像装置对多角度回波信号进行波束合成处理，得到多个偏转角度下的多角度波束合成数据，超声成像装置利用超宽带非线性造影成像技术来将多角度波束合成数据处理成多角度组织成像数据成像和/或多角度造影成像数据。
S204、超声成像装置采用相干角度复合技术，对多角度成像数据进行相干角度复合，得到多角度复合数据。
当超声成像装置将多角度回波信号处理成多角度成像数据之后，超声成像装置就要采用相干角度复合技术，对多角度成像数据进行相干角度复合，得到多角度复合数据。
本发明实施例中，超声成像装置利用相干角度复合技术，对各个偏转角度下的成像数据进行复合，得到多角度复合数据。
S205、超声成像装置按照信号幅度，计算多角度成像数据中相邻角度成像数据之间的相关系数，相邻角度成像数据为多个偏转角度中相邻两个偏转角度对应的成像数据。
当超声成像装置将多角度波束合成数据处理成多角度成像数据之后，超声成像装置就要按照信号幅度，计算多角度成像数据中相邻角度成像数据之间的相关系数了。
需要说明的是，由于多角度成像数据是由多个偏转角度下的数据点组成的，因此，超声成像装置通过计算多个偏转角度下的数据点的增强系数，来得到多角度成像数据的增强系数，首先，超声成像装置通过依次计算相邻角度下对应的相同位置的数据点之间表征信号幅度相关性的相关系数，来计算相邻角度成像数据之间的相关系数。
S206、超声成像装置根据相关系数和预设相关性模型，确定出相邻角度成像数据的相关度，相关度表征相邻角度成像数据的相关性。
当超声成像装置计算出多角度成像数据中相邻角度成像数据之间的相关系数之后，超声成像装置就要根据相关系数和预设相关性模型，确定出相邻角度成像数据的相关度了。
本发明实施例中，预设相关性模型中设置有预设相关系数阈值，超声成像装置将相关系数输入预设相关性模型中，以将相关系数与预设相关系数阈值进行比较，并根据比较结果，为相关系数分配相关度。
本发明实施例中，超声成像装置将相关系数输入预设相关性模型中，并将第一输出结果确定为相邻角度成像数据的相关度，其中，预设相关性模型是利用预设相关系数阈值来进行相关度的计算的，具体的，预设相关性模型将输入的相关系数和预设相关系数阈值进行比较，并根据比较结果分配不同的相关度值。
本发明实施例中，通过预设相关性模型得到的相关度表征了相邻角度成像数据之间的相关性，其中，预设相关性模型的计算原则可以是相邻角度成像数据的相关性越高则输出的相关度越低、或者相邻角度成像数据的相关性越高则输出的相关度越高，具体的根据实际情况选择预设相关性模型的计算原则，本发明实施例不做具体的限定。
S207、超声成像装置根据相关度和预设增强系数模型，计算出与相关度正相关的增强系数。
当超声成像装置确定出相邻角度成像数据的相关度之后，超声成像装置就要根据相关度和预设增强系数模型，计算出相关度正相关的增强系数了。
本发明实施例中，预设增强系数模型包括相加运算和预设单调函数这两个部分。
本发明实施例中，超声成像装置将相关度输入预设增强系数模型中，此时，超声成像装置将相关度进行相加运算，得到相关度总和，之后再根据预设单调函数，对相关度总和进行计算，并输出增强系数。
本发明实施例中，超声成像装置将相关度输入预设增强系数模型中，之后，在预设增强系数模型中，超声成像装置将相关度进行相加运算，得到相关度总和，利用预设单调函数对相关度总和进行计算，得到最终的增强系数，其中，预设单调函数的单调性与相关度正相关，例如，当预设相关性模型的计算原则是相邻角度成像数据的相关性越高则输出的相关度越低时，预设单调函数为单调递减函数；当预设相关性模型的计算原则是相 邻角度成像数据的相关性越高则输出的相关度越高时，预设单调函数为单调递增函数，具体的根据实际情况进行选择，本发明实施例不做具体的限定。
S204和S205-S207为S203之后的并列的步骤，具体的根据实际情况进行选择执行，本发明实施例不做具体的限定。
S208、超声成像装置利用增强系数，对多角度复合数据进行点对点处理，得到增强图像。
当超声成像装置计算出相关度正相关的增强系数之后，超声成像装置就要对增强系数和多角度复合数据进行点对点处理，得到增强图像了。
本发明实施例中，多角度复合数据由多角度复合数据点组成，超声成像装置将多角度复合数据点与对应的增强系数进行点对点处理，得到最终的增强图像。
本发明实施例中，点对点处理包括点对点相加、点对点相乘，具体的根据实际情况进行选择，本发明实施例不做具体的限定。
本发明实施例中，当多角度成像数据为多角度造影成像时，增强图像为造影图像；当多角度成像数据为多角度组织成像时，增强图像为组织图像。
S209、超声成像装置利用预设补偿算法，对增强图像进行数字增益补偿，得到待显示的平面波图像。
当超声成像装置得到增强图像之后，超声成像装置就要利用预设补偿算法，对增强图像进行数字增益补偿，得到待显示的平面波图像了。
本发明实施例中，为了解决增强图像中出现的数字增益不均匀的情况，故，对增强图像进行数字增益补偿，此时，得到了待显示的平面波图像，超声成像装置对平面波图像进行显示，以供用户从平面波图像中进行观察操作。
可以理解的是，超声成像装置获取到多个偏转角度下的多角度成像数 据之后，超声成像数据利用多角度成像数据中相邻角度成像数据之间的相关系数，得到与相邻角度成像数据的相关性正相关的增强系数，最后将增强系数和对多角度成像数据进行相干角度复合后得到的多角度复合数据进行点对点处理，得到增强图像，由于增强系数能够抑制的相关性低的多角度复合数据，增强相关性高的多角度复合数据，使得最终得到的增强图像中的噪声降低，进而提高了增强图像的对比分辨率。
本发明实施例提供一种超声成像方法，应用与超声成像装置，如图9所示，该方法可以包括：
S301、超声成像装置在多个偏转角度下，发射多个平面波束，多个偏转角度中的每一个偏转角度对应至少一个平面波束。
本发明实施例提供的一种超声成像方法适用于基于信号相位相关性进行相干角度复合的超声平面波成像的场景下。
这里，本发明实施例的S301的相关说明参考如图8所示步骤S201的描述进行理解，此处不再赘述。
S302、超声成像装置接收响应多个平面波束的多角度回波信号，多角度回波信号为多个偏转角度下的回波信号。
这里，本发明实施例的S302的相关说明参考如图8所示步骤S202的描述进行理解，此处不再赘述。
S303、超声成像装置将多角度回波信号处理成多角度成像数据，多角度成像数据为多角度造影成像数据和/或多角度组织成像数据。
这里，本发明实施例的S303的相关说明参考如图8所示步骤S203的描述进行理解，此处不再赘述。
S304、超声成像装置采用相干角度复合技术，对多角度成像数据进行相干角度复合，得到多角度复合数据。
这里，本发明实施例的S304的相关说明参考如图8所示步骤S204的描述进行理解，此处不再赘述。
S305、超声成像装置按照信号相位，计算多角度成像数据中相邻角度成像数据之间的相关系数，相邻角度成像数据为多个偏转角度中相邻两个偏转角度对应的成像数据。
当超声成像装置将多角度波束合成数据处理成多角度成像数据之后，超声成像装置就要按照信号相位，计算多角度成像数据中相邻角度成像数据之间的相关系数了。
需要说明的是，由于多角度成像数据是由多个偏转角度下的数据点组成的，因此，超声成像装置通过计算多个偏转角度下的数据点的增强系数，来得到多角度成像数据的增强系数，首先，超声成像装置通过依次计算相邻角度下对应的相同位置的数据点之间表征信号相位相关性的相关系数，来计算相邻角度成像数据之间的相关系数。
S306、超声成像装置根据相关系数和预设相关性模型，确定出相邻角度成像数据的相关度，相关度表征相邻角度成像数据的相关性。
这里，本发明实施例的S306的相关说明参考如图8所示步骤S206的描述进行理解，此处不再赘述。
S307、超声成像装置根据相关度和预设增强系数模型，计算出与相关度正相关的增强系数。
这里，本发明实施例的S307的相关说明参考如图8所示步骤S207的描述进行理解，此处不再赘述。
S304和S305-S307为S303之后的并列的步骤，具体的根据实际情况进行选择执行，本发明实施例不做具体的限定。
S308、超声成像装置利用增强系数，对多角度复合数据进行点对点处理，得到增强图像。
这里，本发明实施例的S308的相关说明参考如图8所示步骤S208的描述进行理解，此处不再赘述。
S309、超声成像装置利用预设补偿算法，对增强图像进行数字增益补 偿，得到待显示的平面波图像。
这里，本发明实施例的S309的相关说明参考如图8所示步骤S209的描述进行理解，此处不再赘述。
本发明实施例提供一种超声成像方法，应用与超声成像装置，如图10所示，该方法可以包括：
S401、超声成像装置在多个偏转角度下，发射多个平面波束，多个偏转角度中的每一个偏转角度对应至少一个平面波束。
本发明实施例提供的一种超声成像方法适用于基于信号频率相关性进行相干角度复合的超声平面波成像的场景下。
这里，本发明实施例的S401的相关说明参考如图8所示步骤S201的描述进行理解，此处不再赘述。
S402、超声成像装置接收响应多个平面波束的多角度回波信号，多角度回波信号为多个偏转角度下的回波信号。
这里，本发明实施例的S402的相关说明参考如图8所示步骤S202的描述进行理解，此处不再赘述。
S403、超声成像装置将多角度回波信号处理成多角度成像数据，多角度成像数据为多角度造影成像数据和/或多角度组织成像数据。
这里，本发明实施例的S403的相关说明参考如图8所示步骤S203的描述进行理解，此处不再赘述。
S404、超声成像装置采用相干角度复合技术，对多角度成像数据进行相干角度复合，得到多角度复合数据。
这里，本发明实施例的S404的相关说明参考如图8所示步骤S204的描述进行理解，此处不再赘述。
S405、超声成像装置按照信号频率，计算多角度成像数据中相邻角度成像数据之间的相关系数，相邻角度成像数据为多个偏转角度中相邻两个偏转角度对应的成像数据。
当超声成像装置将多角度波束合成数据处理成多角度成像数据之后，超声成像装置就要按照信号频率，计算多角度成像数据中相邻角度成像数据之间的相关系数了。
本发明实施例中，超声成像装置通过依次计算相邻角度下对应的相同位置的数据点之间表征信号频率相关性的相关系数，来计算相邻角度成像数据之间的相关系数。
S406、超声成像装置根据相关系数和预设相关性模型，确定出相邻角度成像数据的相关度，相关度表征相邻角度成像数据的相关性。
这里，本发明实施例的S406的相关说明参考如图8所示步骤S206的描述进行理解，此处不再赘述。
S407、超声成像装置根据相关度和预设增强系数模型，计算出与相关度正相关的增强系数。
这里，本发明实施例的S407的相关说明参考如图8所示步骤S207的描述进行理解，此处不再赘述。
S404和S405-S407为S403之后的两个并列的步骤，具体的根据实际情况进行选择执行，本发明实施例不做具体的限定。
S408、超声成像装置利用增强系数，对多角度复合数据进行点对点处理，得到增强图像。
这里，本发明实施例的S408的相关说明参考如图8所示步骤S208的描述进行理解，此处不再赘述。
S409、超声成像装置利用预设补偿算法，对增强图像进行数字增益补偿，得到待显示的平面波图像。
这里，本发明实施例的S409的相关说明参考如图8所示步骤S209的描述进行理解，此处不再赘述。
本发明实施例提供一种超声成像方法，应用与超声成像装置，如图11所示，该方法可以包括：
S501、超声成像装置在多个偏转角度下，发射多个平面波束，多个偏转角度中的每一个偏转角度对应至少一个平面波束。
本发明实施例提供的一种超声成像方法适用于基于相干角度复合技术的超声平面波成像的场景下。
这里，本发明实施例的S501的相关说明参考如图8所示步骤S201的描述进行理解，此处不再赘述。
S502、超声成像装置接收响应多个平面波束的多角度回波信号，多角度回波信号为多个偏转角度下的回波信号。
这里，本发明实施例的S502的相关说明参考如图8所示步骤S202的描述进行理解，此处不再赘述。
S503、超声成像装置将多角度回波信号处理成多角度成像数据，多角度成像数据为多角度造影成像数据和/或多角度组织成像数据。
这里，本发明实施例的S503的相关说明参考如图8所示步骤S203的描述进行理解，此处不再赘述。
S504、超声成像装置基于信号特征，计算多角度成像数据中相邻角度成像数据之间的相关系数，相邻角度成像数据为多个偏转角度中相邻两个偏转角度对应的成像数据。
这里，本发明实施例的S504的相关说明参考如图4所示步骤S102的描述进行理解，此处不再赘述。
S505、超声成像装置根据相关系数和预设相关性模型，确定出相邻角度成像数据的相关度，相关度表征相邻角度成像数据的相关性。
这里，本发明实施例的S505的相关说明参考如图8所示步骤S206的描述进行理解，此处不再赘述。
S506、超声成像装置根据相关度和预设增强系数模型，计算出与相关度正相关的增强系数。
这里，本发明实施例的S506的相关说明参考如图8所示步骤S207的 描述进行理解，此处不再赘述。
S507、超声成像装置利用增强系数，对多角度成像数据进行点对点处理。
当超声成像装置计算出增强系数之后，超声成像装置就要利用增强系数，对多角度成像数据进行点对点处理了。
本发明实施例中，超声成像装置利用增强系数，分别对多角度成像数据进行点对点处理。
本发明实施例中，点对点处理包括点对点相加、点对点相乘，具体的根据实际情况进行选择，本发明实施例不做具体的限定。
S508、超声成像装置采用相干角度复合技术，对点对点处理之后的多角度成像数据进行相干角度复合，得到增强图像。
当超声成像装置利用增强系数，对多角度成像数据进行点对点处理之后，超声成像装置就要采用相干角度复合技术，对点对点处理之后的多角度成像数据进行相干角度复合，得到增强图像了。
本发明实施例中，超声成像装置采用相干角度复合技术，对点对点处理之后的多角度成像数据进行相干角度复合，最终得到增强图像。
S509、超声成像装置利用预设补偿算法，对增强图像进行数字增益补偿，得到待显示的平面波图像。
这里，本发明实施例的S509的相关说明参考如图8所示步骤S209的描述进行理解，此处不再赘述。
可以理解的是，超声成像装置获取到多个偏转角度下的多角度成像数据之后，超声成像数据利用多角度成像数据中相邻角度成像数据之间的相关系数，得到与相邻角度成像数据的相关性正相关的增强系数，最后利用增强系数对多角度成像数据进行点对点处理，之后再对点对点处理之后的多角度成像数据进行相干角度复合，得到增强图像，由于增强系数能够抑制的相关性低的多角度复合数据，增强相关性高的多角度复合数据，使得 最终得到的增强图像中的噪声降低，进而提高了增强图像的对比分辨率。
图12为本发明实施例中的超声成像设备1的结构框图示意图。该超声成像设备1可以包括探头100、发射电路101、发射/接收选择开关102、接收电路103、波束合成电路104、处理器105和显示器106。发射电路101可以激励探头100向目标对象发射多个平面波束。接收电路103可以通过探头100接收从目标对象返回的超声回波，从而获得多角度回波信号。该多角度回波信号经过波束合成电路104进行波束合成处理后，送入处理器105。处理器105对该超声回波信号进行处理，以获得目标对象的超声图像或者介入性物体的超声图像。处理器105获得的超声图像可以存储于存储器107中。这些超声图像可以在显示器106上显示。
其中，所述处理器105具体执行如下步骤：在平面波成像过程中，获取多角度成像数据，所述多角度成像数据为多个偏转角度下的成像数据；
基于信号特征，计算所述多角度成像数据中相邻角度成像数据之间的相关系数，所述相邻角度成像数据为所述多个偏转角度中相邻两个偏转角度对应的成像数据；
根据所述相关系数，得到与所述相邻角度成像数据的相关性正相关的增强系数，所述增强系数为所述多角度成像数据对应的系数；
利用所述增强系数，对多角度复合数据或所述多角度成像数据进行处理，得到增强图像，所述多角度复合数据为对所述多角度成像数据进行相干角度复合后的数据。
进一步地，所述处理器105，还用于根据所述相关系数和预设相关性模型，确定出所述相邻角度成像数据的相关度，所述相关度表征所述相邻角度成像数据的相关性；根据所述相关度和预设增强系数模型，计算出与所述相关度正相关的所述增强系数。
进一步地，所述处理器105，还用于将所述相关系数输入所述预设相关性模型中，获取第一输出结果；将所述第一输出结果确定为所述相关度。
进一步地，所述预设增强系数模型包括相加运算和预设单调函数这两部分，所述预设单调函数的单调性与所述相关度正相关，所述处理器105，还用于将所述相关度输入所述预设增强系数模型中；将所述相关度进行所述相加运算，得到相关度总和；根据所述预设单调函数，对所述相关度总和进行计算，得到第二输出结果；将所述第二输出结果确定为所述增强系数。
进一步地，所述发射电路101，用于在所述多个偏转角度下，发射多个平面波束，所述多个偏转角度中的每一个偏转角度对应至少一个平面波束；
所述接收电路103，用于接收响应所述多个平面波束的多角度回波信号，所述多角度回波信号为所述多个偏转角度下的回波信号；
所述处理器105，用于将所述多角度回波信号处理成所述多角度成像数据，所述多角度成像数据为多角度造影成像数据和/或多角度组织成像数据。
进一步地，所述处理器105，还用于采用相干角度复合技术，对所述多角度成像数据进行相干角度复合，得到所述多角度复合数据；利用所述增强系数，对所述多角度复合数据进行点对点处理，得到所述增强图像。
进一步地，所述处理器105，还用于利用所述增强系数，对所述多角度成像数据进行点对点处理；采用相干角度复合技术，对点对点处理之后的所述多角度成像数据进行相干角度复合，得到所述增强图像。
进一步地，所述点对点处理包括：点对点相加或点对点相乘中的任意一种。
进一步地，所述信号特征包括：信号幅度、信号相位和信号频率中的至少一种。
进一步地，所述处理器105，还用于利用预设补偿算法，对所述增强图像进行数字增益补偿，得到待显示的平面波图像。
另外，在本实施例中的各功能模块可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元 中。上述集成的单元既可以采用硬件的形式实现，也可以采用软件功能模块的形式实现。
所述集成的单元如果以软件功能模块的形式实现并非作为独立的产品进行销售或使用时，可以存储在一个计算机可读取存储介质中，基于这样的理解，本发明实施例的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的全部或部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)或processor(处理器)执行本发明实施例所述方法的全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、ROM、RAM、磁碟或者光盘等各种可以存储程序代码的介质。
本发明实施例提供一种计算机可读存储介质，其上存储有计算机程序，应用于超声成像装置1中，该计算机程序被处理器105执行时实现上述的超声成像方法。
需要说明的是，在本文中，术语“包括”、“包含”或者其任何其他变体意在涵盖非排他性的包含，从而使得包括一系列要素的过程、方法、物品或者系统不仅包括那些要素，而且还包括没有明确列出的其他要素，或者是还包括为这种过程、方法、物品或者系统所固有的要素。在没有更多限制的情况下，由语句“包括一个……”限定的要素，并不排除在包括该要素的过程、方法、物品或者系统中还存在另外的相同要素。
上述本发明实施例序号仅仅为了描述，不代表实施例的优劣。
通过以上的实施方式的描述，本领域的技术人员可以清楚地了解到上述实施例方法可借助软件加必需的通用硬件平台的方式来实现，当然也可以通过硬件，但很多情况下前者是更佳的实施方式。基于这样的理解，本发明的技术方案本质上或者说对现有技术做出贡献的部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质(如ROM/RAM、 磁碟、光盘)中，包括若干指令用以使得一台终端(可以是手机，计算机，服务器，空调器，或者网络设备等)执行本发明各个实施例所述的方法。
上面结合附图对本发明的实施例进行了描述，但是本发明并不局限于上述的具体实施方式，上述的具体实施方式仅仅是示意性的，而不是限制性的，本领域的普通技术人员在本发明的启示下，在不脱离本发明宗旨和权利要求所保护的范围情况下，还可做出很多形式，这些均属于本发明的保护之内。
工业实用性
在本发明实施例中，超声成像装置获取到多个偏转角度下的多角度成像数据之后，超声成像数据利用多角度成像数据中相邻角度成像数据之间的相关系数，得到与相邻角度成像数据的相关性正相关的增强系数，最后利用增强系数，对多角度成像数据或者多角度成像数据进行相干角度复合后得到的多角度复合数据进行处理，得到增强图像，由于增强系数能够抑制的相关性低的多角度复合数据，增强相关性高的多角度复合数据，使得最终得到的增强图像中的噪声降低，进而提高了增强图像的对比分辨率。

Claims (21)

  1. 一种超声成像方法，应用于超声成像装置，所述方法包括：
    在平面波成像过程中，获取多角度成像数据，所述多角度成像数据为多个偏转角度下的成像数据；
    基于信号特征，计算所述多角度成像数据中相邻角度成像数据之间的相关系数，所述相邻角度成像数据为所述多个偏转角度中相邻两个偏转角度对应的成像数据；
    根据所述相关系数，得到与所述相邻角度成像数据的相关性正相关的增强系数，所述增强系数为所述多角度成像数据对应的系数；
    利用所述增强系数，对多角度复合数据或所述多角度成像数据进行处理，得到增强图像，所述多角度复合数据为对所述多角度成像数据进行相干角度复合后的数据。
  2. 根据权利要求1所述的方法，其中，所述根据所述相关系数，得到与所述相邻角度成像数据的相关性正相关的增强系数，包括：
    根据所述相关系数和预设相关性模型，确定出所述相邻角度成像数据的相关度，所述相关度表征所述相邻角度成像数据的相关性；
    根据所述相关度和预设增强系数模型，计算出与所述相关度正相关的所述增强系数。
  3. 根据权利要求2所述的方法，其中，所述根据所述相关系数和预设相关性模型，确定出所述相邻角度成像数据的相关度，包括：
    将所述相关系数输入所述预设相关性模型中，获取第一输出结果；
    将所述第一输出结果确定为所述相关度。
  4. 根据权利要求3所述的方法，其中，所述预设增强系数模型包括相加运算和预设单调函数这两部分，所述预设单调函数的单调性与所述相关度正相关，所述根据所述相关度和预设增强系数模型，计算出与所述相关 度正相关的所述增强系数，包括：
    将所述相关度输入所述预设增强系数模型中；
    将所述相关度进行所述相加运算，得到相关度总和；
    根据所述预设单调函数，对所述相关度总和进行计算，得到第二输出结果；
    将所述第二输出结果确定为所述增强系数。
  5. 根据权利要求1所述的方法，其中，所述获取多角度成像数据，包括：
    在所述多个偏转角度下，发射多个平面波束，所述多个偏转角度中的每一个偏转角度对应至少一个平面波束；
    接收响应所述多个平面波束的多角度回波信号，所述多角度回波信号为所述多个偏转角度下的回波信号；
    将所述多角度回波信号处理成所述多角度成像数据，所述多角度成像数据为多角度造影成像数据和/或多角度组织成像数据。
  6. 根据权利要求1所述的方法，其中，所述获取多角度成像数据之后，所述方法还包括：
    采用相干角度复合技术，对所述多角度成像数据进行相干角度复合，得到所述多角度复合数据；
    相应的，所述利用所述增强系数，对多角度复合数据或所述多角度成像数据进行处理，得到增强图像，包括：
    利用所述增强系数，对所述多角度复合数据进行点对点处理，得到所述增强图像。
  7. 根据权利要求1所述的方法，其中，所述利用所述增强系数，对多角度复合数据或所述多角度成像数据进行处理，得到增强图像，包括：
    利用所述增强系数，对所述多角度成像数据进行点对点处理；
    采用相干角度复合技术，对点对点处理之后的所述多角度成像数据进 行相干角度复合，得到所述增强图像。
  8. 根据权利要求6或7所述的方法，其中，所述点对点处理包括：点对点相加或点对点相乘中的任意一种。
  9. 根据权利要求1所述的方法，其中，所述信号特征包括：信号幅度、信号相位和信号频率中的至少一种。
  10. 根据权利要求1所述的方法，其中，所述利用所述增强系数，对多角度复合数据或所述多角度成像数据进行处理，得到增强图像之后，所述方法还包括：
    利用预设补偿算法，对所述增强图像进行数字增益补偿，得到待显示的平面波图像。
  11. 一种超声成像装置，所述超声成像装置包括：
    探头；
    发射电路，所述发射电路激励所述探头向目标对象发射多个平面波束；
    接收电路，所述接收电路通过所述探头接收从所述目标对象返回的超声回波以获得多角度回波信号；
    处理器，所述处理器处理所述多角度回波信号以获得所述目标对象的增强图像；
    显示器，所述显示器显示所述增强图像；
    其中，所述处理器还执行如下步骤：
    在平面波成像过程中，获取多角度成像数据，所述多角度成像数据为多个偏转角度下的成像数据；
    基于信号特征，计算所述多角度成像数据中相邻角度成像数据之间的相关系数，所述相邻角度成像数据为所述多个偏转角度中相邻两个偏转角度对应的成像数据；
    根据所述相关系数，得到与所述相邻角度成像数据的相关性正相关的增强系数，所述增强系数为所述多角度成像数据对应的系数；
    利用所述增强系数，对多角度复合数据或所述多角度成像数据进行处理，得到增强图像，所述多角度复合数据为对所述多角度成像数据进行相干角度复合后的数据。
  12. 根据权利要求11所述的超声成像装置，其中，
    所述处理器，还用于根据所述相关系数和预设相关性模型，确定出所述相邻角度成像数据的相关度，所述相关度表征所述相邻角度成像数据的相关性；根据所述相关度和预设增强系数模型，计算出与所述相关度正相关的所述增强系数。
  13. 根据权利要求12所述的超声成像装置，其中，
    所述处理器，还用于将所述相关系数输入所述预设相关性模型中，获取第一输出结果；将所述第一输出结果确定为所述相关度。
  14. 根据权利要求13所述的超声成像装置，其中，所述预设增强系数模型包括相加运算和预设单调函数这两部分，所述预设单调函数的单调性与所述相关度正相关，
    所述处理器，还用于将所述相关度输入所述预设增强系数模型中；将所述相关度进行所述相加运算，得到相关度总和；根据所述预设单调函数，对所述相关度总和进行计算，得到第二输出结果；将所述第二输出结果确定为所述增强系数。
  15. 根据权利要求11所述的超声成像装置，其中，
    所述发射电路，用于在所述多个偏转角度下，发射多个平面波束，所述多个偏转角度中的每一个偏转角度对应至少一个平面波束；
    所述接收电路，用于接收响应所述多个平面波束的多角度回波信号，所述多角度回波信号为所述多个偏转角度下的回波信号；
    所述处理器，用于将所述多角度回波信号处理成所述多角度成像数据，所述多角度成像数据为多角度造影成像数据和/或多角度组织成像数据。
  16. 根据权利要求11所述的超声成像装置，其中，
    所述处理器，还用于采用相干角度复合技术，对所述多角度成像数据进行相干角度复合，得到所述多角度复合数据；利用所述增强系数，对所述多角度复合数据进行点对点处理，得到所述增强图像。
  17. 根据权利要求11所述的超声成像装置，其中，
    所述处理器，还用于利用所述增强系数，对所述多角度成像数据进行点对点处理；采用相干角度复合技术，对点对点处理之后的所述多角度成像数据进行相干角度复合，得到所述增强图像。
  18. 根据权利要求16或17所述的超声成像装置，其中，所述点对点处理包括：点对点相加或点对点相乘中的任意一种。
  19. 根据权利要求11所述的超声成像装置，其中，所述信号特征包括：信号幅度、信号相位和信号频率中的至少一种。
  20. 根据权利要求11所述的超声成像装置，其中，
    所述处理器，还用于利用预设补偿算法，对所述增强图像进行数字增益补偿，得到待显示的平面波图像。
  21. 一种计算机可读存储介质，其上存储有计算机程序，应用于超声成像装置，该计算机程序被处理器执行时实现如权利要求1-10任一项所述的方法。
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