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WO2019049666A1 - Dispositif de traitement d'images, procédé d'utilisation de dispositif de traitement d'images et programme d'utilisation de dispositif de traitement d'images - Google Patents

Dispositif de traitement d'images, procédé d'utilisation de dispositif de traitement d'images et programme d'utilisation de dispositif de traitement d'images Download PDF

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Publication number
WO2019049666A1
WO2019049666A1 PCT/JP2018/030990 JP2018030990W WO2019049666A1 WO 2019049666 A1 WO2019049666 A1 WO 2019049666A1 JP 2018030990 W JP2018030990 W JP 2018030990W WO 2019049666 A1 WO2019049666 A1 WO 2019049666A1
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WIPO (PCT)
Prior art keywords
image
image processing
digestive tract
medical device
processing apparatus
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Ceased
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PCT/JP2018/030990
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English (en)
Japanese (ja)
Inventor
優輔 鈴木
千葉　淳
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Olympus Corp
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Olympus Corp
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A61B1/04—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor combined with photographic or television appliances
    • A61B1/045—Control thereof

Definitions

  • the present invention relates to an image processing apparatus, an operation method of the image processing apparatus, and an operation program of the image processing apparatus.
  • an image group including a plurality of images acquired in chronological order by a capsule endoscope is acquired, and a partial image is extracted from the image group and summarized into an image group having a smaller number than the original image group.
  • An image processing apparatus that performs image summarization processing is known (see, for example, Patent Document 1).
  • the efficiency of observation by a medical worker such as a doctor can be improved by excluding an image obtained by imaging the same feature area.
  • the capsule endoscope may move in the opposite direction to the anus because it moves by peristaltic movement of the digestive tract.
  • the image captured when the capsule endoscope returns is an image obtained by capturing an already captured region of the digestive tract.
  • Such an image is also included in the image summarized by the image processing apparatus of Patent Document 1, and therefore, a part of the digestive tract is overlapped and observed, and there is a problem that the observation efficiency is lowered.
  • the present invention has been made in view of the above, and an object of the present invention is to provide an image processing apparatus capable of improving observation efficiency, an operation method of the image processing apparatus, and an operation program of the image processing apparatus.
  • the image processing apparatus is configured such that the medical device has already passed among images taken by a medical device introduced into the digestive tract
  • the image processing apparatus may further include a processing unit configured to select a representative image from among the images determined not to be images obtained by imaging the section in the digestive tract.
  • the processing unit includes an extraction unit that extracts a candidate image that is a candidate for the representative image from the image group, and the medical device A determination unit that determines whether or not the image of the section in the digestive tract which has already passed is imaged, and a candidate image that is determined not to be an image of the section in the digestive tract which the medical device has already passed And a selection unit for selecting a representative image.
  • the processing unit is an image obtained by imaging a section in the digestive tract in which the medical device has already passed, with respect to each image included in the image group Characterized in that it has a determination unit that determines whether or not it is, and an extraction unit that extracts the representative image from among the images determined not to be images obtained by imaging the section in the digestive tract through which the medical device has already passed.
  • the image processing apparatus further includes a calculation unit that calculates the moving direction of the medical device when each image included in the image group is captured, and the processing unit is configured to calculate the moving direction. And processing for selecting a representative image from among the images determined not to be images obtained by imaging the section in the digestive tract which the medical device has already passed.
  • the calculation unit may calculate the movement direction based on position information of the medical device when each image included in the image group is captured. It features.
  • an image processing apparatus includes a display control unit that causes the display device to display the representative image.
  • the medical device is a capsule endoscope.
  • the image processing apparatus is not an image obtained by imaging a section in the digestive tract through which the medical device has already passed, among images captured by the medical device introduced into the digestive tract.
  • the display control unit is configured to display a representative image selected from the determined images on the display device.
  • the processing unit is a section in the digestive tract in which the medical device has already passed among the image group captured by the medical device introduced into the digestive tract. It is characterized in that the image processing apparatus is caused to execute a processing step of selecting a representative image from among the images determined not to be captured images.
  • an image processing apparatus capable of improving observation efficiency, an operation method of the image processing apparatus, and an operation program of the image processing apparatus.
  • FIG. 1 is a schematic view showing an endoscope system according to a first embodiment of the present invention.
  • FIG. 2 is a block diagram of the recording medium shown in FIG. 1 connected to the image processing apparatus.
  • FIG. 3 is a flowchart showing the operation of the image processing apparatus shown in FIG.
  • FIG. 4 is a view showing the movement of the capsule endoscope in the digestive tract.
  • FIG. 5 is a diagram illustrating an example of an in-vivo image.
  • FIG. 6 is a diagram illustrating an example of an in-vivo image.
  • FIG. 7 is a diagram illustrating an example of an in-vivo image.
  • FIG. 8 is a flowchart showing the operation of the image processing apparatus according to the second modification of the first embodiment.
  • FIG. 9 is a flowchart showing the operation of the image processing apparatus according to the second embodiment.
  • FIG. 10 is a view showing the movement of the capsule endoscope in the digestive tract.
  • FIG. 11 is a flowchart showing the operation of the image processing apparatus according to the third embodiment.
  • FIG. 12 is a view showing the movement of the capsule endoscope in the digestive tract.
  • FIG. 13 is a block diagram of a configuration that causes a processing device connected via the Internet to execute a part of processing.
  • FIG. 1 is a schematic view showing an endoscope system according to a first embodiment of the present invention.
  • the endoscope system 1 is a system that acquires an in-vivo image of the inside of the subject 100 using a capsule endoscope 2 as a swallow-type medical device and causes a doctor or the like to observe the in-vivo image.
  • the endoscope system 1 includes, in addition to the capsule endoscope 2, a receiving device 3, an image processing device 4, a portable recording medium 5, an input device 6, and a display device. And 7.
  • the recording medium 5 is a portable recording medium for transferring data between the receiving device 3 and the image processing device 4 and is configured to be removable from the receiving device 3 and the image processing device 4 respectively. There is.
  • the capsule endoscope 2 is a capsule endoscope device formed in a size that can be introduced into the organ of the subject 100, introduced into the organ of the subject 100 by oral intake or the like, The in-vivo images are sequentially taken while moving inside the organ by the like. Then, the capsule endoscope 2 sequentially transmits the image data generated by imaging.
  • the receiving device 3 includes a plurality of receiving antennas 3a to 3h, and receives image data from the capsule endoscope 2 in the subject 100 using at least one of the plurality of receiving antennas 3a to 3h. Then, the receiving device 3 accumulates the received image data in the recording medium 5 inserted into the receiving device 3.
  • the receiving antennas 3a to 3h may be disposed on the body surface of the subject 100 as shown in FIG. 1, or may be disposed on a jacket worn by the subject 100. Further, the number of receiving antennas provided in the receiving device 3 may be one or more, and is not particularly limited to eight.
  • FIG. 2 is a block diagram of the recording medium shown in FIG. 1 connected to the image processing apparatus.
  • the image processing apparatus 4 includes a reader / writer 41, a storage unit 42, and a control unit 43.
  • the reader / writer 41 has a function as an image acquisition unit that acquires image data to be processed from the outside. Specifically, when the recording medium 5 is inserted into the reader / writer 41, the reader / writer 41 controls the control unit 43 to store image data stored in the recording medium 5 (capsule type endoscope 2. In-vivo image group including a plurality of in-vivo images captured (acquired) in chronological order in accordance with step 2). Also, the reader / writer 41 transfers the captured in-vivo image group to the control unit 43. Then, the in-vivo image group transferred to the control unit 43 is stored in the storage unit 42.
  • the storage unit 42 stores the in-vivo image group transferred from the control unit 43.
  • the storage unit 42 also stores various programs (including an image processing program) executed by the control unit 43 and information necessary for processing of the control unit 43.
  • the storage unit 42 is realized by various IC memories such as a flash memory, a read only memory (ROM) and a random access memory (RAM), and a hard disk electrically connected by a built-in or data communication terminal.
  • the control unit 43 is configured using a general-purpose processor such as a central processing unit (CPU) or a dedicated processor such as various arithmetic circuits that execute a specific function such as an application specific integrated circuit (ASIC).
  • the control unit 43 reads a program (including an image processing program) stored in the storage unit 42, and controls the entire operation of the endoscope system 1 according to the program.
  • the control unit 43 has a processing unit 431 and a display control unit 432, as shown in FIG.
  • the processing unit 431 is a digest that the capsule endoscope 2 has already passed among the image group captured by the capsule endoscope 2 introduced into the digestive tract based on the moving direction of the capsule endoscope 2. A process of selecting a representative image from among the images determined not to be an image obtained by imaging a section in the duct is performed.
  • the processing unit 431 includes an extraction unit 4311, a calculation unit 4312, a determination unit 4313, and a selection unit 4314.
  • the extraction unit 4311 extracts a candidate image that is a candidate for a representative image from the image group.
  • the candidate image is an image captured when the capsule endoscope 2 moves largely in the digestive tract.
  • the extraction unit 4311 compares the images before and after the image group arranged in chronological order to calculate the similarity, and sets the image as a candidate image when the calculated similarity is smaller than a predetermined threshold.
  • a known technique such as scene change determination using a motion vector of an image may be used.
  • the calculating unit 4312 calculates the moving direction based on the position information of the capsule endoscope 2 when each image included in the image group is captured. Specifically, the calculation unit 4312 calculates position information of the capsule endoscope 2 for each image included in the image group from the signal strengths of the reception signals at the reception antennas 3a to 3h received from the reception device 3. Furthermore, the calculating unit 4312 compares position information of images before and after the image group arranged in chronological order, and calculates a direction (moving direction) in which each image moves from the previous image in chronological order.
  • the determining unit 4313 determines whether or not the candidate image is an image obtained by imaging a section in the digestive tract through which the capsule endoscope 2 has already passed.
  • the selection unit 4314 selects, as a representative image, a candidate image determined not to be an image obtained by imaging the section in the digestive tract through which the capsule endoscope 2 has already passed.
  • the display control unit 432 performs predetermined image processing on the image stored in the storage unit 42 and performs predetermined processing such as thinning of data according to the display range of the image on the display device 7 and gradation processing. After that, the representative image is displayed on the display device 7.
  • the input device 6 is configured using a keyboard, a mouse, and the like, and receives an operation by the user.
  • the display device 7 is configured using a liquid crystal display or the like, and displays an image including a representative image and the like under the control of the display control unit 432.
  • FIG. 3 is a flowchart showing the operation of the image processing apparatus shown in FIG. As shown in FIG. 3, first, the extraction unit 4311 extracts a candidate image from the image group stored in the storage unit 42 by the capsule endoscope 2 via the recording medium 5 (step S1). .
  • FIG. 4 is a view showing the movement of the capsule endoscope in the digestive tract.
  • the reference direction D is the direction in which the capsule endoscope 2 moves toward the anus. Therefore, in the portion where the digestive tract is bent, the reference direction D also changes along the extension direction of the digestive tract.
  • the reference direction D can be calculated, for example, by averaging the moving directions of several images before and after each image.
  • the calculation unit 4312 calculates the movement direction of the ith image (step S5).
  • the determining unit 4313 determines whether or not the candidate image is an image obtained by imaging a section in the digestive tract through which the capsule endoscope 2 has already passed. Specifically, the determination unit 4313 compares the movement direction Ai of the ith image with the reference direction D, and determines whether the movement direction Ai of the ith image is positive (step S6). The determining unit 4313 determines that the angle between the movement direction Ai of the i-th image and the reference direction D is less than 90 degrees, and determines that the angle is more than 90 degrees.
  • each arrow (A 1, A 2,%) Indicates the moving direction when each image is captured.
  • the moving directions A1, A2 and An + 2 of the 1, 2, and n + 2-th images are positive, and the moving directions An and An + 1 of the n and n + 1-th images are negative.
  • step S6 determines that the moving direction is positive (step S6: Yes)
  • the selecting unit 4314 selects the candidate image (i-th image) as a representative image (step S7).
  • step S6: No the process proceeds to step S8.
  • step S8 determines whether i> N is satisfied. If i> N is not satisfied (step S8: No), the process returns to step S4, and if i> N, the series of processing ends.
  • an image whose moving direction is positive is set as a representative image, whereas an image which is determined as a negative moving direction is Not selected as a representative image. That is, the capsule endoscope 2 returns in the digestive tract, and an image captured in the same range in an overlapping manner is excluded from the representative image. As a result, a medical worker such as a doctor does not observe an image captured by overlapping the same range, and the observation efficiency is improved.
  • the moving direction of the capsule endoscope 2 is calculated using the position information of the capsule endoscope 2, but the capsule endoscope using the image captured by the capsule endoscope 2 The moving direction of 2 may be calculated.
  • the calculating unit 4312 sets feature points B in the image.
  • the feature point B is, for example, an end of a fold or unevenness in the digestive tract.
  • the calculator 4312 calculates the moving direction of the capsule endoscope 2 as positive.
  • the calculating unit 4312 calculates the moving direction of the capsule endoscope 2 as negative.
  • the method of calculating the moving direction of the capsule endoscope 2 is not particularly limited.
  • the moving direction of the capsule endoscope 2 may be calculated based on the speed information and the acceleration information detected by the speed sensor and the acceleration sensor of the capsule endoscope 2.
  • the determination unit 4313 is an image obtained by imaging a section in the digestive tract in which the capsule endoscope 2 has already passed, with respect to each image included in the image group It is determined whether the In addition, the extraction unit 4311 extracts a representative image from the image determined not to be an image obtained by imaging the section in the digestive tract through which the capsule endoscope 2 has already passed.
  • FIG. 8 is a flowchart showing the operation of the image processing apparatus according to the second modification of the first embodiment.
  • the process of step S1 is not performed, and the process starts from the process of step S2. Then, the processing from step S2 to step S6 is performed as in the first embodiment.
  • the determination unit 4313 determines whether or not an image of a section in the digestive tract in which the capsule endoscope 2 has already passed is captured for all the images included in the image group.
  • the selecting unit 4314 selects an image determined not to be an image obtained by imaging the section in the digestive tract through which the capsule endoscope 2 has already passed as a display candidate image (step S11).
  • step 8 is performed as in the first embodiment, and the processes of steps S5 to S11 are performed on all the images.
  • the extraction unit 4311 extracts a representative image from the display candidate images (step S12).
  • the order of the process of the first embodiment may be switched.
  • an image processing apparatus capable of improving the observation efficiency can be realized.
  • the image processing apparatus 4 according to the second embodiment is different from that of the first embodiment in the processing in the processing unit 431, but the configuration of the image processing apparatus 4 may be the same as that of the first embodiment. Do.
  • FIG. 9 is a flowchart showing the operation of the image processing apparatus according to the second embodiment. As shown in FIG. 9, the same processing as in the first embodiment is performed from step S1 to step S4.
  • the calculation unit 4312 calculates the movement direction and the movement amount of the ith image (step S21).
  • the determining unit 4313 determines whether or not the candidate image is an image obtained by imaging a section in the digestive tract through which the capsule endoscope 2 has already passed (step S6).
  • step S6 determines that the moving direction is not positive (step S6: No)
  • the processing unit 431 stores the amount of movement in the reverse direction (step S22). Specifically, the processing unit 431 stores the movement amount calculated by the calculation unit 4312 in the storage unit 42. Thereafter, the process proceeds to step S8, and the same process as that of the first embodiment is performed.
  • step S6 determines that the movement direction is positive (step S6: Yes)
  • the processing unit 431 reads the storage of the storage unit 42 and determines whether or not there is storage of the movement amount in the reverse direction. Is determined (step S23).
  • step S23 If the determination unit 4313 determines that there is storage of the backward movement amount (step S23: Yes), the processing unit 431 determines that the forward movement amount is the reverse movement amount stored in the storage unit 42. It is determined whether it has exceeded (step S24).
  • FIG. 10 is a view showing the movement of the capsule endoscope in the digestive tract.
  • the direction of each arrow (C1, C2,%) Indicates the movement direction when each image is captured, and the length of each arrow indicates the movement amount when each image is captured.
  • the capsule endoscope 2 moves in the reverse direction by the movement amount E1.
  • the amount of movement in the positive direction does not exceed the amount of movement E1 (step S24: No)
  • the process proceeds to step S8.
  • step S24 Yes
  • the processing unit 431 resets the storage of the amount of movement in the reverse direction to the storage unit 42.
  • the selection unit 4314 selects the candidate image (the n + 3rd image) as a representative image (Step S7). Thereafter, the process proceeds to step S8, and the same process as that of the first embodiment is performed.
  • step S23 when the determination unit 4313 determines that there is no storage of the movement amount in the reverse direction (step S23: No), the processing unit 431 selects the candidate image (i-th image) as the selection unit 4314. A representative image is selected (step S7). Thereafter, the process proceeds to step S8, and the same process as that of the first embodiment is performed.
  • the processing unit 431 selects the representative image based on the movement direction and the movement amount, so the capsule endoscope 2 has already been moved even if it has moved in the forward direction.
  • the image (the n + 2th image in FIG. 10) obtained by imaging the section in the digestive tract that has passed is also excluded from the representative image.
  • the observation efficiency is further improved compared to the first embodiment.
  • the image processing apparatus 4 according to the third embodiment is different from that of the first embodiment in the processing in the processing unit 431, but the configuration of the image processing apparatus 4 may be the same as that of the first embodiment. Do.
  • FIG. 11 is a flowchart showing the operation of the image processing apparatus according to the third embodiment. As shown in FIG. 11, the same processes as in the second embodiment are performed from step S1 to step S6.
  • step S6 determines that the moving direction is not positive (step S6: No)
  • the processing unit 431 stores the moving start position in the reverse direction (step S31). Thereafter, the process proceeds to step S8, and the same process as that of the first embodiment is performed.
  • step S6 determines that the moving direction is positive
  • the processing unit 431 reads the storage of the storage unit 42 and determines whether or not there is a storage of the movement start position in the reverse direction. It is determined (step S32).
  • step S32 determines that there is storage of the movement start position in the reverse direction. If the determination unit 4313 determines that there is storage of the movement start position in the reverse direction (step S32: Yes), the processing unit 431 determines that the position of the capsule endoscope 2 is stored in the storage unit 42 in the reverse direction. It is determined whether it has exceeded the movement start position to (step S33).
  • FIG. 12 is a view showing the movement of the capsule endoscope in the digestive tract.
  • the direction of each arrow (F1, F2,%) Indicates the movement direction when each image is captured, and the length of each arrow indicates the movement amount when each image is captured.
  • the storage unit 42 stores the movement start position P0 in the reverse direction. It is assumed that the capsule endoscope 2 is moved in the opposite direction when the nth and n + 1th images are captured. In this case, in the (n + 2) -th image, the position P1 of the capsule endoscope 2 does not exceed the movement start position P0 (step S33: No), the process proceeds to step S8.
  • step S33 Yes
  • the processing unit 431 stores the movement start position storage unit 42 in the reverse direction.
  • the memory in the memory is reset (step S34), and the selecting unit 4314 selects the candidate image (the n + 3rd image) as a representative image (step S7). Thereafter, the process proceeds to step S8, and the same process as that of the first embodiment is performed.
  • step S32 when the determination unit 4313 determines that there is no storage of the movement start position in the reverse direction (step S32: No), the processing unit 431 determines that the candidate image (i-th image) is the candidate image Is selected as a representative image (step S7). Thereafter, the process proceeds to step S8, and the same process as that of the first embodiment is performed.
  • the observation efficiency is further improved than the first embodiment.
  • the value detected by the speed sensor, and the acceleration sensor may be calculated.
  • FIG. 13 is a block diagram of a configuration that causes a processing device connected via the Internet to execute a part of processing. As shown in FIG. 13, at least a part of the processing performed by the processing unit may be executed by the processing device 8A connected via the Internet line. Further, at least a part of the processing performed by the processing unit may be performed on a cloud including a plurality of processing devices (server groups). In this case, the control unit 43A of the image processing apparatus 4A may not have a processing unit.
  • the display control unit 432A is not an image obtained by imaging a section in the digestive tract through which the capsule endoscope 2 has already passed, out of the image group imaged by the capsule endoscope 2 introduced into the digestive tract.
  • the representative image selected from the determined images is displayed on the display device 7.

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  • Life Sciences & Earth Sciences (AREA)
  • Surgery (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Biomedical Technology (AREA)
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  • General Health & Medical Sciences (AREA)
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Abstract

Ce dispositif de traitement d'images, ce procédé d'utilisation de dispositif de traitement d'images et ce programme d'utilisation de dispositif de traitement d'images sont pourvus chacun: d'une unité de traitement qui exécute un processus pour sélectionner une image représentative parmi des images qui sont dans un groupe d'images capturées par un instrument médical introduit dans le tractus gastro-intestinal et qui ont été déterminées pour ne pas être des images capturant une section à l'intérieur du tractus gastro-intestinal à travers laquelle l'instrument médical a déjà passé. Par cette configuration, la présente invention peut fournir un dispositif de traitement d'image, un procédé d'utilisation de dispositif de traitement d'image, et un programme d'utilisation de dispositif de traitement d'image, avec lesquels il est possible d'améliorer l'efficacité d'observation.
PCT/JP2018/030990 2017-09-05 2018-08-22 Dispositif de traitement d'images, procédé d'utilisation de dispositif de traitement d'images et programme d'utilisation de dispositif de traitement d'images Ceased WO2019049666A1 (fr)

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JP2017-170533 2017-09-05

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110004059A1 (en) * 2008-07-09 2011-01-06 Innurvation, Inc. Displaying Image Data From A Scanner Capsule
JP2013183912A (ja) * 2012-03-08 2013-09-19 Olympus Corp 画像要約装置及びプログラム
WO2016047190A1 (fr) * 2014-09-22 2016-03-31 オリンパス株式会社 Dispositif d'affichage d'image, procédé d'affichage d'image, et programme d'affichage d'image

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110004059A1 (en) * 2008-07-09 2011-01-06 Innurvation, Inc. Displaying Image Data From A Scanner Capsule
JP2013183912A (ja) * 2012-03-08 2013-09-19 Olympus Corp 画像要約装置及びプログラム
WO2016047190A1 (fr) * 2014-09-22 2016-03-31 オリンパス株式会社 Dispositif d'affichage d'image, procédé d'affichage d'image, et programme d'affichage d'image

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