WO2018119718A1 - Procédé et dispositif d'extraction d'image dans un balayage à ultrasons, et système d'imagerie à ultrasons - Google Patents

Procédé et dispositif d'extraction d'image dans un balayage à ultrasons, et système d'imagerie à ultrasons Download PDF

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Publication number
WO2018119718A1
WO2018119718A1 PCT/CN2016/112544 CN2016112544W WO2018119718A1 WO 2018119718 A1 WO2018119718 A1 WO 2018119718A1 CN 2016112544 W CN2016112544 W CN 2016112544W WO 2018119718 A1 WO2018119718 A1 WO 2018119718A1
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image
ultrasound
ultrasound image
frame
library
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PCT/CN2016/112544
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English (en)
Chinese (zh)
Inventor
沈莹莹
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深圳迈瑞生物医疗电子股份有限公司
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Priority to CN201680083788.4A priority Critical patent/CN108778139A/zh
Priority to PCT/CN2016/112544 priority patent/WO2018119718A1/fr
Publication of WO2018119718A1 publication Critical patent/WO2018119718A1/fr

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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

Definitions

  • the present invention relates to the field of medical technology, and in particular, to an image extraction method, apparatus, and ultrasound imaging system in ultrasonic scanning.
  • Ultrasonic instruments can be used to help ultrasound instrument users (such as doctors) to obtain non-intuitive internal information. During the observation process, doctors often need to pause to see the new findings. At present, ultrasonic instruments on the market require doctors to manually search through frames and frames in order to retrieve accurate and clear ultrasound images. In this way, for a doctor who needs a lot of inspections a day and a large number of anatomical locations, there is no doubt that the workload is very large and even exceeds its load.
  • the invention provides an image extraction method and device in an ultrasonic scan and an ultrasonic imaging system, which can quickly identify a desired frame ultrasound image in an ultrasound picture, can reduce the workload of the user, and improve work efficiency.
  • an image extraction method in an ultrasonic scan comprising the steps of:
  • the ultrasound image or movie file is output.
  • an image extracting apparatus in an ultrasonic scan which comprises:
  • a triggering unit configured to obtain a time point of triggering image position selection in the continuously acquired ultrasound image
  • the ultrasound image library generating unit is configured to acquire, according to the time point, a multi-frame ultrasound image continuously acquired on a predetermined time period associated with the time point to form a to-be-selected ultrasound image library;
  • An image evaluation unit configured to perform image evaluation on the ultrasound image in the to-be-selected ultrasound image library, to obtain an ultrasound image or a movie file that meets an image evaluation standard
  • An output unit for outputting the ultrasound image or movie file.
  • an image extraction system in an ultrasound scan which includes:
  • a transmitting circuit and a receiving circuit configured to excite the probe to emit an ultrasonic beam to the tissue target, and receive an echo of the ultrasonic beam to obtain an echo signal
  • an image processing module configured to generate an ultrasound image according to the echo signal, obtain a time point of triggering image position selection in the continuously acquired ultrasound image, and acquire a predetermined schedule associated with the time point according to the time point
  • the multi-frame ultrasound image continuously acquired in the time period forms an ultrasound image library to be selected, and performs image evaluation on the ultrasound image in the ultrasound image library to be selected to obtain an ultrasound image or a movie file that satisfies the image evaluation standard;
  • a display for displaying the ultrasound image or movie file and outputting.
  • FIG. 1 is a schematic structural view of an ultrasonic imaging apparatus provided by the present invention.
  • FIG. 2 is a schematic flow chart of an embodiment of an image extraction method in an ultrasonic scan according to the present invention
  • FIG. 3 is a schematic structural diagram of an embodiment of an image extracting apparatus in an ultrasonic scan according to the present invention
  • FIG. 4 is a schematic structural view of an embodiment of the image evaluation unit of FIG. 3;
  • FIG. 5 is a block diagram showing another embodiment of the image evaluation unit of Figure 3.
  • FIG. 1 provides a schematic structural diagram of a system of an ultrasound image acquisition device.
  • the apparatus includes a probe 20, a transmitting circuit 2, a transmit/receive selection switch 3, a receiving circuit 4, a beam combining module 5, a signal processing module 6, an image processing module 7, and a display 8.
  • the transmitting circuit 2 transmits the delayed-focused ultrasonic pulse having a certain amplitude and polarity to the probe 20 through the transmitting/receiving selection switch 3.
  • the probe 20 is excited by the ultrasonic pulse to transmit ultrasonic waves to a target area (not shown in the figure, such as cardiac tissue) of the body to be tested, and receive ultrasonic echoes with tissue information reflected from the target area after a certain delay.
  • the receiving circuit 4 receives the electrical signals generated by the conversion of the probe 20, obtains ultrasonic echo signals, and sends the ultrasonic echo signals to the beam combining module 5.
  • the beam combining module 5 performs focus delay on the ultrasonic echo signal and adds The weight and channel summation and the like are processed, and then the ultrasonic echo signal is sent to the signal processing module 6 for related signal processing.
  • the ultrasonic echo signals processed by the signal processing module 6 are sent to the image processing module 7.
  • the image processing module 7 performs different processing on the signals according to different imaging modes required by the user, obtains image data of different modes, and then forms ultrasonic images of different modes by logarithmic compression, dynamic range adjustment, digital scan conversion, etc., such as B image, C image, D image, and the like.
  • the ultrasound image generated by the image processing module 7 is sent to the display 8 for display.
  • an ultrasound image of systolic end-systolic and end-diastolic phases can be simultaneously displayed on the display interface, and the endocardial contour can be outlined on the ultrasound image.
  • the ultrasound images of the systolic end-systolic and end-diastolic phases for simultaneous display may be standard ultrasound section images (eg, apical two-chamber heart, apical four-chamber heart, etc.), or ultrasound section images corresponding to any section selected by the user.
  • the system shown in FIG. 1 further includes an operation control module 9.
  • the device user can input a control command on the display interface by operating the control module 9, for example, triggering image position selection, and selecting an operation instruction such as a final final output ultrasonic image.
  • the operation control module 9 may include a control panel such as a keyboard or a mouse.
  • an image extraction method, apparatus, and ultrasound imaging system in ultrasonic scanning are provided. Can reduce the user's workload and improve work efficiency.
  • FIG. 2 is a schematic flowchart diagram of an embodiment of an image extraction method in an ultrasound scan according to an embodiment of the present invention. It can be understood that how to determine a desired frame in an ultrasound image generally considers two factors: whether the image slice is Accurate and clear whether the picture is, it is usually expected that the frame contains the frame with the most accurate image and/or the clearest picture. In one embodiment, the two conditions can be combined to find a higher definition picture within the range of the ultrasound image that satisfies the accuracy of the image slice, thereby confirming the desired frame ultrasound image or movie file therein. Specifically, the method includes the following steps:
  • Step S10 transmitting an ultrasonic beam to the tissue target through the ultrasonic probe
  • Step S11 receiving an echo of the ultrasonic beam through the probe to obtain an echo signal
  • Step S12 generating an ultrasound image according to the echo signal and storing it;
  • step S13 the image processing module obtains a time point for triggering image position selection in the continuously acquired ultrasound image; the step is specifically:
  • the image processing module selects one frame in the continuously acquired ultrasound image, and uses the position time corresponding to the selected frame as the time point.
  • the user can input an instruction related to image saving or freezing by operating a freeze key or a storage key on the operation control module 9, and the image processing module determines the time point according to the instruction.
  • the storage keys here include commonly used video recording commands, single-frame image saving instructions, and the like.
  • the operation of the user mentioned may be a button operation after the doctor observes the target information
  • connection acquisition refers to completing an ultrasonic scan description process, which may include multiple scan cycles.
  • the scan period herein may include a period of motion formed in accordance with the motion of an anatomical structure, such as a cardiac cycle with respect to cardiac motion.
  • step S14 the image processing module acquires the multi-frame ultrasound image continuously acquired in the predetermined time period associated with the time point according to the time point to form the to-be-selected ultrasound image library; specifically, the image processing module may include at least one of the following:
  • a plurality of frames of ultrasound images continuously acquired over a predetermined period of time including the above-mentioned time points are selected to form a library of ultrasound images to be selected.
  • the image slice acquisition data before, after, or before and after the operation is determined to be accurate.
  • the fixed period of time may be 1 second, 2 seconds, 3 seconds, etc., but it may not be a long time, for example, the time when the doctor moves the probe to another position for scanning.
  • step S15 the image processing module performs image evaluation on the ultrasound image in the selected ultrasound image library to obtain an ultrasound image or a movie file that satisfies the image evaluation standard.
  • the image evaluation standard refers to the two criteria of the face matching degree and the image sharpness in the following step S15, and can also make a multi-level judgment.
  • the standard is used as the basis for the judgement.
  • step S15 one or more frames of non-continuous ultrasound images satisfying the image evaluation criteria can be obtained in one embodiment, and in other embodiments, a movie file (multi-frame continuous ultrasound images can be obtained).
  • a movie file multi-frame continuous ultrasound images can be obtained.
  • the step S15 includes: including at least one of the following steps S150 and S151:
  • Step S150 Comparing the ultrasound image in the to-be-selected ultrasound image library with a standard slice, performing image face matching degree determination, and obtaining a multi-frame ultrasound image in the candidate ultrasound image library that satisfies the face matching degree determination criterion.
  • the image slice matching degree determination is specifically: comparing all the ultrasound images in the candidate ultrasound image library with the pre-stored standard slice model images to obtain a multi-frame ultrasound image in which the aspect matching degree is satisfied.
  • the capacity of the ultrasound image library to be selected may be determined according to the characteristics of different examination sites and the appropriate predetermined duration.
  • the first few images that meet the matching feature of the facet can be selected to enter the definition candidate list;
  • the standard cut surface template matching process may not be required, and the image in the ultrasonic image library to be selected is directly used as the ultrasonic image satisfying the matching degree of the facet.
  • the difference in profile position is similar for a large period of time observed. That is, for the ultrasound images of these parts, most of the pictures in the pre-time period satisfy the index of the aspect matching.
  • Step S151 Perform image sharpness determination on the ultrasound image in the to-be-selected ultrasound image library, and obtain one or more frames of ultrasound images in the candidate ultrasound image library that satisfy the image clarity determination criterion.
  • the image sharpness determining step includes at least one of the following:
  • a threshold may be preset, and when the difference of the speed of the continuous picture exceeds the threshold, the position is determined to be a clear and fuzzy interface;
  • a plurality of reference indicators such as sound velocity calculation, correlation coefficient analysis, histogram matching, image average gray value, and the like are employed in step S152 of the present embodiment.
  • the resolution of the picture is quantized as a result of continuous stability of the picture sound speed, large front and rear frame correlation coefficient values, continuous histogram statistical results, appropriate image average gray value, and the like, or a combination of single or multiple indicators.
  • the step S15 may generate a movie file, which specifically includes the following steps:
  • a corresponding continuous multi-frame image in one scan period that satisfies the evaluation criteria is extracted, a movie file is formed, and stored.
  • the following method can be adopted to determine a scan period that satisfies the evaluation criteria:
  • Finding a first criterion for satisfying image sharpness and aspect matching degree in a plurality of consecutive sampling single frame images determining a scanning period in which the consecutive plurality of sampling single frame images are located as one scanning period satisfying an evaluation criterion;
  • the scan period in which the sampled single frame image is located is determined as one scan period that satisfies the evaluation criteria
  • a second criterion for finding that a plurality of sampled single-frame images satisfy the image sharpness and the aspect matching degree in one scan period is determined, and the scan period is determined as one scan period that satisfies the evaluation criteria.
  • the scan period is determined as one scan period that satisfies the evaluation criteria.
  • the second judging criterion is second only to the first judging criterion in terms of image sharpness and aspect matching degree.
  • the first judging criterion may be used to determine a single desired frame from the to-be-selected ultrasound image library.
  • a plurality of desired frames, such as movie files, may also be determined from the candidate ultrasound image library in conjunction with the first criterion and the second criterion.
  • step S16 the ultrasound image or movie file is output.
  • the step S16 further includes:
  • the ultrasonic image whose resolution meets the requirement is one frame, it is directly displayed and output through the display;
  • the micro-image of the multi-frame ultrasound image may be displayed by using a display, and the image processing module prompts the user to select on the display interface, and determines one frame according to the user's selection.
  • the frame image is expected to be output; when it is determined to be a movie file, the movie file is output.
  • the embodiment provides an image extraction method, device and ultrasound imaging system in ultrasonic scanning System.
  • the process of determining the desired frame is triggered by the user to form a library of the selected ultrasound images in the predetermined time period, and the image matching degree determination and the definition recognition are performed on all the ultrasound images in the selected ultrasound image library, so that the desired image can be quickly located. Frame position.
  • FIG. 3 is a schematic structural diagram of an embodiment of an image extracting apparatus in an ultrasonic scanning according to an embodiment of the present invention.
  • the image extracting apparatus 1 in the ultrasonic scanning includes:
  • the triggering unit 10 is configured to obtain a time point of triggering image position selection in the continuously acquired ultrasound image
  • the to-be-selected ultrasound image library generating unit 11 is configured to acquire, according to the time point, a multi-frame ultrasound image continuously acquired on a predetermined time period associated with the time point to form a to-be-selected ultrasound image library;
  • the image evaluation unit 12 is configured to perform image evaluation on the ultrasound image in the to-be-selected ultrasound image library to obtain an ultrasound image or a movie file that meets the image evaluation criteria;
  • the output unit 14 is configured to output the ultrasound image or movie file.
  • the to-be-selected ultrasound image library generating unit 11 specifically forms the to-be-selected ultrasound image library in one of the following ways:
  • a plurality of frames of ultrasound images continuously acquired over a predetermined period of time including the point in time are selected to form a library of ultrasound images to be selected.
  • the image evaluation unit 12 further comprises:
  • the cut surface determining unit 121 is configured to compare the ultrasonic image in the to-be-selected ultrasonic image library with a standard cut surface, perform image cut surface matching degree determination, and obtain a multi-frame ultrasonic image that satisfies the criterion of the matching degree of the matching surface in the selected ultrasonic image database. ;
  • the definition determining unit 122 is configured to perform resolution recognition on the ultrasound image in the to-be-selected ultrasound image library, and obtain one or more frames of ultrasound images in the image clarity determination standard in the candidate ultrasound image library.
  • the section determining unit 121 specifically compares all the ultrasound images in the candidate ultrasound image library with the pre-stored standard section model pictures to obtain a multi-frame ultrasound image in which the aspect matching degree is satisfied.
  • the sharpness judging unit 122 realizes the sharpness judgment by at least one of the following:
  • the display output unit 14 performs display output in one of the following manners:
  • the thumbnail of the multi-frame ultrasound image is displayed, prompting the user to select, and determining one of the frames as the desired frame image according to the user's selection and outputting.
  • the image evaluation unit 12 further includes:
  • Sampling unit 120 for a predetermined time of more than one scan period from the library of ultrasound images to be selected Sampling in consecutive multi-frame images of segments to obtain multiple single-frame images;
  • the slice determining unit 121 is configured to compare the ultrasonic image in the to-be-selected ultrasound image library with a standard slice, and perform image face matching degree determination;
  • the definition determining unit 122 is configured to perform sharpness recognition on the ultrasound image in the to-be-selected ultrasound image library
  • the extracting unit 123 is configured to extract consecutive consecutive multi-frame images in one scanning period that meet the image evaluation standard, form a movie file, and store the file.
  • the extracting unit 123 determines one scanning period that satisfies the evaluation criteria by the following method:
  • Finding a first criterion for satisfying image sharpness and aspect matching degree in a plurality of consecutive sampling single frame images determining a scanning period in which the consecutive plurality of sampling single frame images are located as one scanning period satisfying an evaluation criterion;
  • a second criterion for finding that a plurality of sampled single-frame images satisfy the image sharpness and the aspect matching degree in one scan period is determined, and the scan period is determined as one scan period that satisfies the evaluation criteria. For details, refer to the related description of step S15 above.
  • the functions of the slice determining unit 121 and the definition determining unit 122 can be referred to the foregoing description of FIG. 4.
  • an image extraction system in ultrasonic scanning which includes:
  • a transmitting circuit and a receiving circuit configured to excite the probe to emit an ultrasonic beam to the tissue target, and receive an echo of the ultrasonic beam to obtain an echo signal
  • An image processing module configured to generate an ultrasound image according to the echo signal, and store In the continuously acquired ultrasound image, a time point for triggering the image position selection is obtained, and according to the time point, the multi-frame ultrasound image continuously acquired on the predetermined time period associated with the time point is acquired, and the ultrasound image library to be selected is formed. Performing image evaluation on the ultrasound image in the to-be-selected ultrasound image library to obtain an ultrasound image or a movie file that satisfies the image evaluation criteria;
  • a display for displaying the ultrasound image or movie file and outputting.
  • the image processing module performs the various steps in FIG. 2, which specifically includes the functional modules of the image extracting apparatus in the ultrasonic scanning of FIG. 3 to FIG. 5, and the detailed description of each step process may be omitted. See the description of the relevant content above.
  • the image processing module mentioned herein may be constructed by one processor or multiple processors.
  • the image processing module obtains a point in time by:
  • one frame is selected in the continuously acquired ultrasound images, and the position time corresponding to the selected frame is taken as the time point.
  • the image processing module obtains a library of ultrasound images to be selected by:
  • a plurality of frames of ultrasound images continuously acquired before or/or after the time point are selected to form a library of ultrasound images to be selected.
  • the image processing module obtains a multi-frame ultrasound image that satisfies the aspect matching degree by:
  • the image processing module obtains one or more frames of ultrasound images whose resolution meets the requirements by at least one of the following:
  • the display is displayed in one of the following ways:
  • a thumbnail of the multi-frame ultrasound image is displayed, prompting the user to select, and determining one of the frames as the desired frame ultrasound image according to the user's selection and outputting.
  • this embodiment has obvious advantages in some application scenarios. For example, in a scene, when the user presses the freeze button or the store button during the process of ultrasonic acquisition of the image, the system recognizes that pressing the freeze button or the store button determines that the image provided for the freeze is presented on the display, but now In some conventional methods, if the user's hand is displaced at this time, the probe will shift, and the image presented on the display will not be the image that the user expects when pressing the freeze button or the storage button. Turning back the image, and using the method provided in this embodiment, after pressing the freeze button or the storage button, the image presented on the display is performed by performing the process of face matching degree judgment and image sharpness determination regardless of whether the probe is displaced or not. It will be closer to the image that the user expects (the desired frame image).
  • the conventional method of storing a movie file in the conventional method is: when the user determines the scanning position and the cutting position according to the display during the scanning process, press the recording button to start recording the movie, and if the probe shifts during the process. , then the image in the movie will also be off-track, then you need to re-record, and after using the method of this embodiment, when you start to press the record button, Recording a movie associated with a period of time near this point in time, and then extracting the desired movie file to the user after evaluation, whether the probe moves or not will not affect the quality of the movie file.
  • the embodiment provides an image extraction method, device and ultrasonic imaging system in ultrasonic scanning.
  • the process of determining the desired frame ultrasound image is triggered by the user, and the ultrasound image library to be selected within a predetermined time period is formed according to the motion characteristics of different examination parts of the human body, and the image matching degree of the ultrasound image in the selected ultrasound image library is determined or / and image sharpness judgment to eliminate blurred images caused by operation or tissue movement, can quickly locate the position of the desired frame ultrasound image.
  • the humanized design of the ultrasonic instrument can be realized, and the efficiency of the ultrasonic instrument user to obtain the required ultrasonic picture is improved.
  • the storage medium may be a magnetic disk, an optical disk, a read-only memory (ROM), or a random access memory (RAM).

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Abstract

La présente invention concerne un procédé d'extraction d'image dans un balayage à ultrasons. Le procédé comprend les étapes consistant à : obtenir un point temporel pour déclencher une sélection de position d'image dans des images ultrasonores recueillies en continu ; obtenir, en fonction du point temporel, plusieurs trames d'images ultrasonores recueillies en continu dans une période de temps prédéfinie associée au point temporel, de façon à former une bibliothèque d'images ultrasonores devant être sélectionnées ; déterminer des degrés de correspondance de section d'image de toutes les images ultrasonores dans la bibliothèque d'images ultrasonores à sélectionner, de façon à obtenir plusieurs trames d'images ultrasonores dans celles-ci satisfaisant un degré de correspondance de section ; reconnaître des définitions desdites plusieurs trames d'images ultrasonores satisfaisant le degré de correspondance de section, de façon à obtenir une ou plusieurs trames d'images ultrasonores satisfaisant une exigence de définition ; et afficher et fournir la ou les trames d'images ultrasonores satisfaisant l'exigence de définition. La présente invention concerne également un dispositif correspondant et un système d'imagerie à ultrasons. La charge de travail d'un utilisateur peut être réduite, et l'efficacité de travail peut être améliorée.
PCT/CN2016/112544 2016-12-28 2016-12-28 Procédé et dispositif d'extraction d'image dans un balayage à ultrasons, et système d'imagerie à ultrasons WO2018119718A1 (fr)

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CN201680083788.4A CN108778139A (zh) 2016-12-28 2016-12-28 在超声扫描中的图像提取方法、装置及超声成像系统
PCT/CN2016/112544 WO2018119718A1 (fr) 2016-12-28 2016-12-28 Procédé et dispositif d'extraction d'image dans un balayage à ultrasons, et système d'imagerie à ultrasons

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