JP5692818B2 - Specimen slide imaging device - Google Patents

Description

  Embodiments described herein relate generally to an image processing apparatus, a program for the image processing apparatus, and a specimen slide imaging apparatus.

  In recent years, with the widespread use of virtual slide systems, an environment in which digital images of pathological specimens can be easily obtained is being prepared. In addition to storing digital images in the data server, annotation information about the area that was noticed at the time of diagnosis can be added and stored as digital data. As a result, convenience in education and conferences aimed at improving diagnostic techniques has been significantly improved.

  As a specimen slide imaging apparatus for realizing the above system, there is an apparatus used in a system that can capture an image of a pathological specimen and confirm the captured digital image even from a remote place. The specimen slide imaging apparatus can transmit a digital image to a data server. The data server can add and save not only the transmitted digital image but also information such as the area noted at the time of diagnosis as digital data.

  Since the system using the specimen slide imaging apparatus having this structure is premised on the use of patient data in a hospital, image data and annotation information cannot be used online from outside the hospital. For this reason, there is a specimen slide imaging apparatus that allows the annotation information of the specimen slide image to be viewed offline.

JP 2006-189414 A JP 2010-185818 A

  However, since this specimen slide imaging device is not a device that can be additionally written, it is necessary to copy only the annotation information of the image from the system database and create it separately on a DVD or the like, and the burden of this work is very large, The identification with the actual slide is also time-consuming.

  The problem to be solved by the present invention is to provide an image processing apparatus, a program for an image processing apparatus, and a specimen slide imaging apparatus capable of associating a specimen slide image and image annotation information when used offline.

In order to solve the above problems, a sample slide imaging apparatus according to an embodiment includes a camera that images a sample slide and generates image information of a sample, a communication I / F that receives the image information, and the communication I / F. Annotation information memory that records annotation information related to the received image information of the specimen and data indicating coordinates on the specimen slide corresponding to the annotation information, and the annotation on the image information received by the communication I / F a processor in which the annotation information recorded in the information memory and adds the data, the annotation information and a display unit for displaying the image information obtained by adding the data and image processing apparatus having, attached to the specimen slide specimen and a bar code reader for reading a bar code indicating the ID, the annotation information before the are writing or storage of data relating to the sample read barcodes And a RFID reader-writer for reading annotation information and the data, and the annotation information read by the RFID reader-writer is characterized in that is displayed on the display unit in accordance with the data indicating the coordinates.

1 is an overall configuration diagram of a system including a specimen slide imaging apparatus according to an embodiment. The whole block diagram of the sample slide imaging device of this embodiment. The figure showing the XY stage of this embodiment. FIG. 3 is a functional configuration diagram realized by an image processing unit in the present embodiment. The figure which shows an example of the GUI display on the display part in this embodiment 6 is a flowchart showing the operation of the image processing unit in the present embodiment. The flowchart showing the XY stage drive process in this embodiment. The figure of an example of the preservation | save data displayed on the image area in this embodiment. The figure of an example of the preservation | save data displayed with additional information on the image area in this embodiment. The flowchart showing the process at the time of selecting the circle button in this embodiment. The flowchart showing the process at the time of selecting the line button in this embodiment. The flowchart showing the process at the time of selecting the text button in this embodiment. 6 is a flowchart showing I / F initialization processing in the present embodiment. The figure which shows an example of the annotation information memory in this embodiment. The flowchart showing the sample slide glass imaging process in this embodiment.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  The configuration of the specimen slide imaging apparatus 10 will be described with reference to FIGS.

  FIG. 1 is a schematic configuration diagram of a system including a specimen slide imaging apparatus 10 according to the present embodiment. The specimen slide imaging apparatus 10 transmits the captured image information 69, annotation information 70, and specimen ID 72 (Identifier) that is an ID of the specimen slide to the pathology department data server 11. The pathology department data server 11 stores the image information 69 and the annotation information 70 as patient information 73 associated with the specimen ID 72. The pathology department data server 11 transmits patient information 73 including patient information 73, image information 69, and annotation information 70 to the in-hospital electronic medical record server 12 based on a request from the in-hospital electronic medical record server 12.

  FIG. 2 is an overall configuration diagram of the specimen slide imaging apparatus 10. The specimen slide imaging apparatus 10 includes an image processing unit 20 including a CPU 41 (see FIG. 4) as a processor, an RFID (Radio Frequency Identification) reader / writer 21, a barcode reader 22, and a CCD (Charge Coupled Device) as an image imaging unit. The camera 23 and the XY stage 24 are included.

  The RFID reader / writer 21 is used as so-called writing / reading means. The RFID reader / writer 21 writes data to the RFID tag 32 attached to the specimen slide glass 30 based on an instruction from the CPU 41. The RFID reader / writer 21 reads data written to the RFID tag 32 based on an instruction from the CPU 41. The RFID reader / writer 21 transmits / receives RFID data to / from the image processing unit 20.

  Based on an instruction from the CPU 41, the barcode reader 22 reads the sample ID 72 of the barcode 33 attached to the specimen slide glass 30 and transmits data to the image processing unit 20.

  Based on an instruction from the CPU 41, the CCD camera 23 captures an image of the specimen slide glass 30 through an objective lens mounted as necessary, and transmits image information 69 to the image processing unit 20.

  The XY stage 24 fixes the specimen image at a predetermined position as shown in FIG. A motor (not shown) is operated based on an instruction from the CPU 41. By the operation of the motor, the XY stage 24 moves in the directions of arrows A and B which are horizontal directions. Thereby, the CCD camera 23 images an arbitrary part of the specimen slide glass 30.

  FIG. 4 is a block diagram showing a control system of the specimen slide imaging apparatus 10 of the present embodiment. The specimen slide imaging apparatus 10 includes an image processing unit 20 including a CPU 41 that controls the entire specimen slide imaging apparatus, an RFID reader / writer 21, a barcode reader 22, a CCD camera 23, and an XY stage 24.

  The image processing unit 20 includes a communication I / F (Interface) 40, a CPU 41, a ROM 42, a RAM 43, an input / output port (I / O port) 45, a bus line connecting them, and the like. The image processing unit 20 includes a display unit 46 and an operation unit 47. The display unit 46 is, for example, a monitor, and displays various types of information regarding imaging operations and various types of information regarding captured image settings. The operation unit 47 is, for example, a mouse or a keyboard, and the user performs an input operation from outside.

  FIG. 5 is a diagram showing an example of GUI (Graphical User Interface) display on the display unit. For example, the window shown in FIG. The window displays a first image display area 48 that displays an image captured by the CCD camera 23 in real time, a second image display area 49 that displays a captured still image in the first image display area 48, and an XY stage 24 in the vertical and horizontal directions. These buttons are composed of four control buttons 51a, 51b, 51c, 51d, five buttons for image processing, and toolbox buttons 57-59. The five buttons for performing image processing are an image reading button 52, an RFID annotation reading button 53, an RFID annotation writing button 54, an image saving button 55, and an end button 56 on the GUI shown in FIG. The toolbox buttons 57 to 59 are, for example, three types of buttons: a circle button 57, a line button 58, and a text button 59.

  Next, a series of operations of the image processing unit 20 will be described with reference to the GUI display diagram of FIG. 5 and the flowchart of FIG.

  In Act A101, the CPU 41 performs I / F initialization processing. The I / F initialization process will be described later with reference to FIGS. 5, 13, and 14. Further, after the I / F initialization processing, in Act A151, the CPU 41 performs imaging processing of the entire specimen slide glass 30. The imaging process of the entire specimen slide glass 30 will be described later with reference to FIG.

  After the I / F initialization processing, in Act A102, the CPU 41 performs image capture processing. The CPU 41 receives the image information 69 from the CCD camera 23 and stores the image signal in a predetermined area of the RAM 43 for display in the first image display area 48 (see FIG. 5) on the display unit 46. The data stored in the area of the RAM 43 is displayed in the first image display area 48 on the display unit 46.

  When the CPU 41 recognizes that the user has selected the control button 51 (see FIG. 5) (Y in A103), in Act A104, the CPU 41 performs the driving process of the XY stage 24.

  The driving process of the XY stage 24 will be described with reference to FIG. When the CPU 41 recognizes that the user has selected the control button A51a (see FIG. 5) (Y in A301), in Act A305, the CPU 41 sends a command for operating the XY stage 24 in the Y direction to the XY stage 24. Send. When the CPU 41 recognizes that the user has selected the control button B51b (Y in A302), in Act A306, the CPU 41 transmits a command for operating the XY stage 24 in the direction opposite to the X direction to the XY stage 24. To do. When the CPU 41 recognizes that the user has selected the control button C51c (Y in A303), in Act A307, the CPU 41 transmits a command for operating the XY stage 24 in the direction opposite to the Y direction to the XY stage 24. To do. When the CPU 41 recognizes that the user has selected the control button D51d (Y in A304), in Act A308, the CPU 41 transmits a command for operating the XY stage 24 in the X direction to the XY stage 24. In Act A309, the CPU 41 stores the coordinate data of the XY stage 24 calculated based on the data transmitted to the XY stage 24 in the RAM 43. Returning to FIG. 6, when the CPU 41 does not recognize that the user has selected the control button 51 (N in A103, N in A304), the CPU 41 does not perform the driving process of the XY stage 24.

  After the XY stage 24 driving process, five buttons such as an image reading button 52, an RFID annotation reading button 53, an RFID annotation writing button 54, an image saving button 55, and an end button 56 on the GUI shown in FIG. After determining whether 59 is pressed, each processing is performed.

  When the CPU 41 recognizes that the user has selected the end button 56 (see FIG. 5) (Y in A105), this process is ended. When the CPU 41 does not recognize that the user has selected the end button 56 (N in A105), Act A106 is performed.

  When the CPU 41 recognizes that the user has selected the image reading button 52 (Y in A106), the CPU 41 performs an image reading process in Act A111. In the image reading process, the CPU 41 receives an image signal from the CCD camera. The CPU 41 stores the received data in a predetermined RAM 43 area. The data stored in the area of the RAM 43 is displayed in the second image display area 49 as shown in FIG. 8, for example.

  After the received data is stored in the area of the RAM 43 or when the CPU 41 does not recognize that the user has selected the image reading button 52 (N in A106), Act A107 is performed.

  In Act A107, when the CPU 41 recognizes that the user has selected the RFID annotation reading button 53 (Y in A107), in Act A112, the CPU 41 performs RFID annotation reading processing. In Act A120, the CPU 41 transmits a command for reading RFID tag data to the RFID reader / writer 21. In Act A121, the CPU 41 stores the RFID tag data read by the RFID reader / writer 21 in the annotation information memory 71 in the RAM. In Act A115, the CPU 41 draws the annotation information 70 in the second image display area 49.

  After completion of the RFID annotation reading process or when the CPU 41 does not recognize that the user has selected the RFID annotation reading button 52 (N in A107), Act A108 is performed.

  If the CPU 41 recognizes that the user has selected the RFID annotation writing button in Act A108 (Y in A108), the CPU 41 performs RFID annotation writing processing in Act A113. In Act A120, the CPU 41 transmits a command for writing the annotation information memory 71 in the RAM and the annotation information 70 to the RFID reader / writer, and causes the annotation information 70 to be written to the RDID tag.

  After completion of the RFID annotation writing process or when the CPU 41 does not recognize that the user has selected the RFID annotation writing button (N in A108), Act A109 is performed.

  In Act A109, when the CPU 41 recognizes that the user has selected the image saving button 55 (Y in A109), in Act A131, the CPU 41 transmits the image of the specimen slide glass 30 to the pathology department data server 11. To do. Thereafter, in Act A132, the CPU 41 transmits the annotation information memory 71 to the pathology department data server 11. Further, the image of the second image display area 49 (see FIG. 5), the annotation information 70, and the specimen ID are transmitted to the pathology department data server 11.

  If the CPU 41 does not recognize the end of the image saving process or that the user has selected the image saving button 55 (N in A109), Act A110 is performed.

  When the CPU 41 recognizes that the user has selected the toolbox buttons 57 to 59 in Act A110 (Y in A110), the CPU 41 performs toolbox processing in Act A117. After the end of the toolbox processing or when the CPU 41 does not recognize that the user has selected the toolbox buttons 57 to 59 (Y in A110), the processing from Act A102 is performed again.

  There are three types of toolbox buttons, for example, a circle button 57, a line button 58, and a text button 59. When the user selects several buttons, the CPU 41 performs the respective button processing and adds it to the annotation information memory 71. The information added by the toolbox buttons 57 to 59 is displayed in the second image display area 49 as shown in FIG. Processing when the user selects any of the toolbox buttons 57 to 59 will be described with reference to FIGS.

  FIG. 10 is a flowchart showing a flow when the circle 57a drawing process is performed. When the CPU 41 recognizes that the user has selected the circle button 57, the CPU 41 instructs to perform the circle 57a drawing process.

  In Act A401, the CPU 41 additionally describes the ID representing the circle process in the mark type of the annotation information memory 71 in the RAM 43. In the second image display area 49, when the CPU 41 detects that the mouse button 60 is ON (Y in A402), the click position is calculated in Act A403, and the annotation information in the RAM 43 is used as the in-plane coordinates P. Save in the memory 71. When the CPU 41 does not detect that the mouse button 60 is ON in the second image display area 49 (N in A402), A402 is performed again.

  The calculated click position is stored in the in-plane coordinates 1 of the annotation information memory 71 in the RAM 43 as the in-plane coordinates P. If the CPU 41 detects that the mouse button 60 is OFF (Y in A404), the current mouse position is calculated in Act A405, and the in-plane coordinates of the annotation information memory 71 in the RAM 43 are used as the in-plane coordinates Q. 2 is stored. If the CPU 41 does not detect that the mouse button 60 is OFF in the second image display area 49 (N in A404), the current mouse position is calculated in Act A406. In Act A407, a circle passing through the current mouse position is drawn around the in-plane coordinates P, and Act A404 is performed again.

  In Act A404, this process is performed until the CPU 41 recognizes that the mouse button 60 is OFF.

  FIG. 11 is a flowchart showing a flow when the line 58a drawing process is performed. Processes similar to the circle 57a drawing process are denoted by the same reference numerals, and description of the same reference numerals is omitted. When the CPU 41 recognizes that the user has selected the line button 58, the CPU 41 instructs the line 58a drawing process to be performed.

  In Act A501, the CPU 41 additionally describes the ID representing the line processing in the mark type of the annotation information memory 71 in the RAM 43.

  In Act A401, the CPU 41 additionally describes the ID representing the circle process in the mark type of the annotation information memory 71 in the RAM 43. In the second image display area 49, when the CPU 41 detects that the mouse button 60 is ON (Y in A402), the click position is calculated in Act A403, and the annotation information in the RAM 43 is used as the in-plane coordinates P. Save in the memory 71. When the CPU 41 does not detect that the mouse button 60 is ON in the second image display area 49 (N in A402), A402 is performed again.

  In Act A401, the CPU 41 additionally describes the ID representing the circle process in the mark type of the annotation information memory 71 in the RAM 43. In the second image display area 49, when the CPU 41 detects that the mouse button 60 is ON (Y in A402), the click position is calculated in Act A403, and the annotation information in the RAM 43 is used as the in-plane coordinates P. Save in the memory 71. When the CPU 41 does not detect that the mouse button 60 is ON in the second image display area 49 (N in A402), A402 is performed again.

  The calculated click position is stored in the in-plane coordinates 1 of the annotation information memory 71 in the RAM 43 as the in-plane coordinates P. If the CPU 41 detects that the mouse button 60 is OFF (Y in A404), the current mouse position is calculated in Act A405, and the in-plane coordinates of the annotation information memory 71 in the RAM 43 are used as the in-plane coordinates Q. 2 is stored. When the CPU 41 does not detect that the mouse button 60 is OFF in the second image display area 49 (N in A404), the current mouse position is calculated in Act A406, and the in-plane coordinates P is calculated in Act A502. To the current mouse position with a line, and Act A404 is performed again.

  In Act A404, this process is performed until the CPU 41 recognizes that the mouse button 60 is OFF.

  FIG. 12 is a flowchart showing a flow when the text 59a drawing process is performed. Processes similar to the circle 57a drawing process are denoted by the same reference numerals, and description of the same reference numerals is omitted. When the CPU 41 recognizes that the user has selected the text button 59, the CPU 41 instructs the drawing process of the text 59a. In Act A601, the CPU 41 additionally describes an ID representing text processing in the mark type of the annotation information memory 71 in the RAM 43. Thereafter, in Act A602, the CPU 41 detects whether or not the user has turned the mouse button 60 on and off.

  When the CPU 41 detects that the user has turned the mouse button 60 on and off (Y in A602), it performs Act A403. When the CPU 41 does not detect that the user has turned the mouse button 60 on and off (N in A602), the act A602 is performed again.

  After Act A403, when the CPU 41 detects that the user has turned the mouse button 60 ON and OFF (Y in A603), in Act A604, the CPU 41 converts the in-plane coordinates of the lower left corner of the text box into the in-plane coordinates. Q is stored in the annotation information memory 71 in the RAM 43. After storing the in-plane coordinates Q, in Act A605, the text data is stored in the annotation information memory 71 in the RAM 43, and the series of processes is terminated.

  After Act A403, if the CPU 41 does not detect that the user has turned the mouse button 60 ON or OFF (N in A603), in Act A606, the CPU 41 displays keyboard input characters.

  When the user selects the toolbox buttons 57 to 59, the CPU 41 performs the respective button processes as described above, and adds the processing results to the annotation information memory 71.

  The operation of the CPU 41 during the I / F initialization process will be described in detail with reference to FIG. 5 using FIG. 13 and FIG. FIG. 13 is a flowchart for explaining the operation of the CPU 41 during the I / F initialization process, and FIG. 14 is a diagram of an example of the annotation information memory 71 secured in the RAM 43.

  In Act A701, the XY stage 24 is initialized. After establishing communication with the XY stage 24, the CPU 41 transmits a command for moving the position of the XY stage 24 to a predetermined position to the XY stage 24. The CPU 41 drives a motor (not shown) to move the XY stage 24, and moves the XY stage 24 to a predetermined origin position. The CPU 41 sets the coordinate data of the XY stage 24 in the RAM 43 to zero.

  In Act A702, the CPU 41 establishes communication with the CCD camera 23 that performs imaging. Thereafter, in Act A703, the CPU 41 establishes communication with the server that is the storage destination of the imaging data. Thereafter, in Act A704, the CPU 41 establishes communication with the RFID reader / writer 21. Communication with the RFID reader / writer 21 is established in order to read / write data of the RFID tag 32 on the specimen slide glass 30.

  In Act A705, the barcode reader 22 is initialized. In the initialization of the barcode reader, a command is sent after the communication between the CPU 41 and the barcode reader 22 is established. The command is for causing the barcode reader 22 to read the barcode 33 attached on the specimen slide glass 30. After receiving the command, the CPU 41 receives the data sent from the barcode reader 22 and stores it in the annotation information memory 71 in the RAM 43.

  In Act A706, the CPU 41 performs GUI display. For example, the window shown in FIG. 5 is displayed on the display unit 46.

  In Act A707, the CPU 41 initializes the annotation information memory 71. The annotation information memory 71 is a data list stored in the RAM 43 as shown in FIG. 14, for example. The sample ID is an identification number of each annotation. Stage X and stage Y are movement amounts from the origin position of the XY stage 24 when an image to which an annotation is added is captured. The mark type is the type of annotation selected by the user from the toolbox. The in-plane coordinate P is a position where an annotation of the captured image is added. The text is text information when the text information is added to the annotation. When the annotation information memory 71 is initialized, a series of I / F initialization processing is completed. The imaging position on the standard sample can be specified by the values of the stage X and the stage Y in the annotation information memory 71, and the in-plane coordinates 1 and the in-plane coordinates 2 relative to the image at the imaging position are used for annotation information 70 on the sample sample. It becomes possible to specify the position of.

  The imaging process of the entire specimen slide glass 30 will be described in detail with reference to FIG.

  The XY stage 24 is moved to a predetermined position by the above-described XY stage initialization. In Act A801, the CPU 41 moves the XY stage 24 to a place P1 where the lower left of the specimen slide glass 30 can be imaged by the CCD camera.

  In Act A802, the CPU 41 images the specimen slide glass 30 with a CCD camera. The CPU 41 receives the image signal transmitted from the CCD camera and stores it in a predetermined area of the RAM 43 in Act A803. The XY stage 24 is moved in the A direction by an amount corresponding to the imaging area of the CCD camera, and an image is taken and stored in a predetermined annotation information memory 71 in the RAM 43. Thereby, the right adjacent area of the lower left part of the imaged specimen slide glass 30 is imaged. The CPU 41 adds the annotation information 70 recorded in the annotation information memory 71 to the received image.

  In Act A804 and Act A807, imaging and storing in the RAM 43 are repeated until the right end of the specimen slide glass 30 can be imaged by the CCD camera.

  When the right end of the specimen slide glass 30 is imaged and stored in the RAM 43 (Y in A804), the XY stage 24 is moved in the A direction to the position where the left end of the specimen slide glass 30 can be imaged by the CCD camera in Act A807. Let Thereafter, in Act A805, it is confirmed whether or not the image has been captured up to the upper right of the specimen slide glass 30.

  If the imaging of the right end of the specimen slide glass 30 and the storage in the RAM 43 are not completed (N in A804), the XY stage 24 is moved in the A direction in Act A807, and the specimen slide glass 30 is imaged again in A802. .

  When imaging is not performed up to the upper right of the specimen slide glass 30 (N in A805), the XY stage 24 is moved in the B direction by an amount corresponding to the imaging area of the CCD camera in Act A808 in order to capture the next location of the specimen slide glass 30. The image is taken and stored in a predetermined annotation information memory 71 in the RAM 43. Thereafter, in order to take an image of the right-side location of the imaged specimen slide glass 30, the XY stage 24 is moved in the A direction by an amount corresponding to the imaging area of the CCD camera, and the image is picked up. To store. The CPU 41 adds the annotation information 70 recorded in the annotation information memory 71 to the received image.

  In this way, imaging and storage in the RAM 43 are repeated until the upper right of the specimen slide glass 30 reaches a place where it can be imaged by the CCD camera.

  When imaging of the entire specimen slide glass 30 is completed (Y in A805), in Act A806, the CPU 41 drives a motor (not shown) to move the XY stage 24, thereby moving the XY stage 24 to a predetermined origin position. Move. The CPU 41 sets the coordinate data of the XY stage 24 in the RAM 43 to 0, and the imaging processing of the entire sample slide glass 30 is completed.

  In this embodiment, the function for implementing the invention is recorded in advance in the apparatus. However, the present invention is not limited to this, and the same function may be downloaded from the network to the apparatus, and the same function is recorded. What is stored in the medium may be installed in the apparatus. The recording medium may be any form as long as the recording medium can store the program and can be read by the apparatus, such as a CD-ROM. In addition, the function obtained by installing or downloading in advance may be realized in cooperation with an OS (operating system) inside the apparatus.

  According to the embodiment described above, by describing the annotation information of the specimen slide in the RFID tag, the annotation information is added to the image, and the specimen slide image and the annotation information of the image can be linked when used offline. A program for the slide imaging device and the specimen slide imaging device is obtained. Thereby, since the annotation information can be obtained without referring to the data linked to the patient information as the in-hospital information, the safety of the data security can be ensured. Further, additional information in diagnosis can be easily handled. In addition, it is possible to simply provide data for conferences, education, or case verification performed by an unspecified number of participants.

  Although an embodiment of the present invention has been described, this embodiment is presented as an example and is not intended to limit the scope of the invention. The novel embodiment can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. This embodiment and its modifications are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

DESCRIPTION OF SYMBOLS 10 ... Sample slide imaging device 11 ... Pathology department data server 20 ... Image processing part 21 ... RFID reader / writer 40 ... Communication I / F
41 ... CPU (processor)
70 ... Annotation information 71 ... Annotation information memory 72 ... Specimen ID (Specimen slide ID)

Claims (1)

A camera that images the specimen slide and generates image information of the specimen ;
The communication I / F that receives the image information, the annotation information related to the image information of the specimen received by the communication I / F, and the annotation that records the data indicating the coordinates on the specimen slide corresponding to the annotation information displaying the information memory, a processor adds the data and the annotation information recorded in the annotation information memory to the image information received by the communication I / F, the image information obtained by adding the data and the annotation information An image processing apparatus having a display unit;
A barcode reader for reading a barcode indicating the specimen ID attached to the specimen slide;
And a RFID reader-writer of the annotation information and write or stored the annotation information of the data relating to the sample obtained by reading the bar code and reading out the data,
A specimen slide imaging apparatus , wherein the annotation information read by the RFID reader / writer is displayed on the display unit in accordance with data indicating the coordinates .

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