Image processing device and angle measuring method in dynamic image

Abstract

To provide an image processing device and an angle measuring method in a dynamic image capable of accurately performing angle measurement on a structure shown in the dynamic image.SOLUTION: An image processing device of the present invention includes: an acquisition unit for acquiring a dynamic image; a setting unit for setting the direction of angle measurement in the dynamic image; and a measuring unit for measuring an angle formed by a base line that serves as a base for the angle measurement and a line segment including a measurement object point as an object of the angle measurement in each of a plurality of frame images included in the dynamic image in the direction set by the setting unit.SELECTED DRAWING: Figure 5

Description

[Technical Field]

[0001] The present disclosure relates to an image processing device and an angle measurement method for dynamic images. [Background technology]

[0002] 2. Description of the Related Art There has been proposed a technique in which a user such as a doctor makes a diagnosis using dynamic images acquired by photographing the dynamic state of a subject.

[0003] For example, Patent Document 1 discloses a technology that accepts the specification of areas or points on the musculoskeletal system in a dynamic image capturing the movement of the musculoskeletal system, aligns the lines connecting the areas or points based on set alignment criteria, and displays the lines superimposed on a representative frame image of the dynamic image. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Publication No. 2023-026878 Summary of the Invention [Problem to be solved by the invention]

[0005] Patent Document 1 discloses measuring the angles between two or more line segments connecting multiple areas or points, which makes it possible to easily recognize the relationship between the structures included in the musculoskeletal system shown in the dynamic image.

[0006] In measurements of structures captured in dynamic images, there is a demand for easier specification of the structure for angle measurement. Also, in measurements of structures captured in dynamic images, there is a demand for more accurate angle measurement regardless of the movement of the structure.

[0007] An object of the present disclosure is to provide an image processing device that can accurately perform angle measurement of a structure that appears in a dynamic image, and a method for measuring an angle in a dynamic image. [Means for solving the problem]

[0008] An image processing device according to one aspect of the present disclosure includes an acquisition unit that acquires a dynamic image, a setting unit that sets the direction of angle measurement in the dynamic image, and a measurement unit that measures the angle formed in the direction set by the setting unit between a reference line that serves as the basis for the angle measurement and a line segment that includes a measurement point that is the subject of the angle measurement, in each of a plurality of frame images included in the dynamic image.

[0009] A method for measuring angles in dynamic images according to one aspect of the present disclosure acquires a dynamic image, sets a direction for angle measurement in the dynamic image, and measures the angle in the set direction between a reference line that serves as the basis for the angle measurement and a line segment that includes a measurement point that is the subject of the angle measurement, for each of a plurality of frame images included in the dynamic image. [Effects of the Invention]

[0010] According to the present invention, it is possible to accurately measure angles of structures that appear in dynamic images. [Brief explanation of the drawings]

[0011] [Figure 1] Block diagram showing an example of the configuration of a radiography system [Figure 2] A block diagram showing an example of the configuration of an image processing device. [Figure 3] Functional block diagram showing the functional configuration of an image processing apparatus [Figure 4] 10 is a flowchart illustrating an example of the operation of angle measurement processing by an image processing device. [Figure 5] A diagram showing an example of a dynamic image and the display of angle measurement direction, reference point, reference line, and measurement target point. [Figure 6]FIG. 1 shows examples of combinations of reference directions in which reference lines extend from reference points and angle measurement directions, and examples of angle measurement results for each combination. DETAILED DESCRIPTION OF THE INVENTION

[0012] Hereinafter, each embodiment of the present disclosure will be described in detail with reference to the drawings. However, more detailed explanation than necessary, for example, detailed explanation of already well-known matters or redundant explanation of substantially the same configuration, may be omitted. However, the scope of the present invention is not limited to the following embodiments and those described in the drawings.

[0013] <Configuration of Radiography System 1> A schematic configuration of a radiation imaging system 1 according to an embodiment of the present disclosure will be described below. FIG. 1 is a block diagram showing an example of the configuration of the radiation imaging system 1.

[0014] 1, the radiography system 1 includes an image processing device 10, a dynamic image generating device 20, and an image server device 30. These components are connected to each other so that they can communicate with each other via a communication network N. The communication network N is a network that complies with, for example, the DICOM (Digital Image and Communications in Medicine) standard.

[0015] In addition to the configuration shown in FIG. 1, the radiation imaging system 1 may be connected to an external system such as a Hospital Information System (HIS) or a Radiology Information System (RIS).

[0016] The dynamic image generating device 20 continuously irradiates a subject (e.g., a patient) with radiation (e.g., X-rays), detects the radiation that has passed through the subject, and generates a dynamic image based on the elapsed time and its intensity. In this specification, a dynamic image is a moving image that shows the movement of the subject, and in particular, the movement of the subject's musculoskeletal system. A dynamic image includes multiple frame images captured in chronological order. Therefore, a dynamic image can show the movement of the subject's musculoskeletal system, such as the shoulders, neck, elbows, knees, hips, wrists, and ankles.

[0017] The dynamic image generating device 20 operates based on operations by, for example, a radiographer, and preset imaging conditions. The imaging conditions include radiation irradiation conditions, image generation conditions, and subject conditions. The radiation irradiation conditions indicate, for example, the pulse rate, pulse width, pulse interval, the number of frames captured per imaging, and the radiation dose per unit time. The image generation conditions indicate image generation conditions such as the frame rate, frame interval, pixel size, and image size. The subject conditions indicate information about the subject (for example, identification information of the subject), the type of musculoskeletal system to be imaged (for example, shoulder, elbow, waist, etc.), etc.

[0018] The dynamic image generating device 20 may be installed inside an imaging room or may be mobile and mounted on a medical cart or the like.

[0019] The dynamic image generating device 20 transmits the generated dynamic image to the image processing device 10 and the image server device 30. At this time, the dynamic image generating device 20 may transmit additional information, including information about the subject appearing in the dynamic image, the type of musculoskeletal system appearing in the dynamic image, and the date and time of shooting, together with the dynamic image or by embedding the information in the dynamic image.

[0020] The image processing device 10 receives dynamic images from the dynamic image generation device 20 and performs various image processing on the dynamic images. The image processing device 10 is configured as a computer including a tablet terminal, a PC (Personal Computer), a workstation, or a dedicated hardware device.

[0021] The image server device 30 stores and manages dynamic images received from the dynamic image generation device 20 or the image processing device 10 in association with accompanying information. In response to a request from the image processing device 10, the image server device 30 transmits the stored dynamic images to the image processing device 10. The image server device 30 is composed of a PC, a workstation, a dedicated hardware device, a virtual server on the cloud, etc.

[0022] 1 shows an example in which the radiography system 1 includes an image server device 30 that is provided independently of the dynamic image generating device 20 or the image processing device 10. However, the present disclosure is not limited to this, and for example, a database for storing and managing dynamic images may be provided in the dynamic image generating device 20 or the image processing device 10. Alternatively, the dynamic images may be transmitted to an external system such as a Picture Archiving and Communication System (PACS), and the dynamic images may be stored and managed in the PACS.

[0023] <Configuration of image processing device 10> FIG. 2 is a block diagram showing an example of the configuration of the image processing device 10. As shown in FIG.

[0024] 2, the image processing device 10 according to this embodiment includes a control unit 101, an operation unit 102, a communication unit 103, a display unit 104, and a storage unit 105. These components are electrically connected via a bus 106.

[0025] The control unit 101 is composed of a CPU (Central Processing Unit) and RAM (Random Access Memory). The CPU of the control unit 101 reads various programs stored in the storage unit 105, loads them into the RAM, and executes various processes in accordance with the loaded programs. In this way, the control unit 101 centrally controls the operations of each unit of the image processing device 10.

[0026] The operation unit 102 is a device that accepts user operations. The operation unit 102 is composed of a keyboard, a pointing device (for example, a mouse, a trackball, etc.), a touchpad, etc. The operation unit 102 outputs a control signal to the control unit 101 in response to an operation by the user.

[0027] In this embodiment, the term "user" includes, for example, a doctor who performs diagnosis using the dynamic image generated by the dynamic image generation device 20, or a radiologist who operates the dynamic image generation device 20 to generate the dynamic image.

[0028] The communication unit 103 communicates with other components of the radiation imaging system 1 via the communication network N shown in FIG.

[0029] The display unit 104 is a display device such as a liquid crystal display (LCD), an organic electroluminescence (EL) display, a cathode ray tube (CRT) display, etc. Based on a control signal input from the control unit 101, the display unit 104 displays dynamic images and various measurement results in the dynamic images.

[0030] The storage unit 105 stores various programs executed by the control unit 101, parameters required for executing the programs, etc. The storage unit 105 may also be capable of storing dynamic images. The storage unit 105 is configured, for example, with a non-volatile semiconductor memory, a hard disk drive (HDD), or a solid state drive (SDD).

[0031] <Operation of the image processing device 10> With the above-described configuration, the image processing device 10 can execute measurement processes using dynamic images received from the dynamic image generation device 20 to perform various measurements of the musculoskeletal system depicted in the dynamic images. The measurement processes include, for example, angle measurement processes, distance measurement processes, and speed measurement processes. The angle measurement processes measure the angle between a reference line extending from a reference point in the dynamic image and a line segment including a measurement target point on a structure that constitutes the musculoskeletal system. The distance measurement processes measure the distance between specific points on the structure. The speed measurement processes measure the speed at which a specific point on the structure moves. The measurement processes performed by the image processing device 10 may include measurement processes other than those described above.

[0032] The operation of the image processing device 10 when it performs angle measurement processing will be described in detail below.

[0033] Fig. 3 is a functional block diagram showing the functional configuration of the image processing device 10 realized by the control unit 101 shown in Fig. 2. The image processing device 10 includes, as its functional configuration, an acquisition unit 11, a setting unit 12, a measurement unit 13, an output unit 14, and an operation reception unit 15.

[0034] The acquisition unit 11 acquires the dynamic image and the accompanying information transmitted from the dynamic image generation device 20.

[0035] The setting unit 12 sets the angle measurement direction, the position of the reference point, the direction of the reference line, and the position of the measurement target point for one dynamic image that is the target of angle measurement processing. The angle measurement direction indicates the direction in which the angle is measured during angle measurement processing. Specifically, the angle measurement direction indicates whether the angle is measured clockwise or counterclockwise. The reference line is a line that serves as the reference for angle measurement. The reference line is a line that extends from a reference point in the dynamic image in a reference direction that becomes 0° during angle measurement. The reference point is the starting point from which the reference line extends. The measurement target point is a point that indicates a specific position of the musculoskeletal system that is the target of angle measurement.

[0036] The settings made by the setting unit 12 are automatically applied to all frame images of the dynamic image. This eliminates the need to make settings related to angle measurement processing for each frame image, reducing the time and effort required for setting.

[0037] The measurement unit 13 measures the angle between the reference line and a line segment including a measurement point in the direction set by the setting unit in each of the frame images included in the dynamic image. The line segment including the measurement point on the musculoskeletal system is, for example, a line segment connecting the measurement point and the reference point.

[0038] The output unit 14 outputs reference information indicating the reference points and reference lines in association with the dynamic image. The output unit 14 also outputs angle information indicating the measured angle in association with the corresponding frame image. The information output by the output unit 14 is displayed on the display unit 104 shown in FIG. 2, for example. Alternatively, the information output by the output unit 14 is stored in the image server device 30 shown in FIG. 1 in association with the dynamic image.

[0039] The operation receiving unit 15 receives an operation from the user via the operation unit 102 .

[0040] Fig. 4 is a flowchart illustrating an example of the operation of angle measurement processing by the image processing device 10. Fig. 4 shows an example of the operation when the image processing device 10 performs angle measurement processing using one dynamic image newly generated by the dynamic image generation device 20.

[0041] In step S1, the acquisition unit 11 acquires a dynamic image and accompanying information. The dynamic image acquired by the acquisition unit 11 is output by the output unit 14 and displayed on the display unit 104. The dynamic image may be displayed on the display unit 104 while the angle measurement process shown in FIG. 4 is being executed.

[0042] In step S2, the setting unit 12 sets the angle measurement direction, the position of the reference point, the direction of the reference line, and the position of the measurement target point for the angle measurement process.

[0043] The setting unit 12 may set the angle measurement direction, the position of the reference point, the direction of the reference line, and the position of the measurement target point based on, for example, an operation performed by a user via the operation unit 102 while viewing a dynamic image displayed on the display unit 104. Alternatively, the setting unit 12 may automatically set the angle measurement direction, the position of the reference point, the direction of the reference line, and the position of the measurement target point based on additional information including information about the musculoskeletal system. Alternatively, the setting unit 12 may automatically set the angle measurement direction, the position of the reference point, the direction of the reference line, and the position of the measurement target point, and then correct the settings based on an operation by the user. The setting unit 12 may not automatically set all of the angle measurement direction, the position of the reference point, the direction of the reference line, and the position of the measurement target point, but may automatically set at least some of the angle measurement direction, the position of the reference point, the direction of the reference line, and the position of the measurement target point, and set the rest based on an operation by the user.

[0044] When the setting unit 12 automatically sets the angle measurement direction, the position of the reference point, the direction of the reference line, and the position of the measurement target point, reference information serving as the basis for the settings is determined in advance and stored in the storage unit 105 (see FIG. 2). The reference information is, for example, information indicating the angle measurement direction, the positions of the reference point and the measurement target point on the structure of the musculoskeletal system, and the direction of the reference line, which is set in advance for each type of musculoskeletal system. The setting unit 12 may automatically set the position of the reference point, the direction of the reference line, and the position of the measurement target point by reading from the storage unit 105 initial information corresponding to the type of musculoskeletal system indicated by the accompanying information. Furthermore, after automatically setting the position of the reference point, the direction of the reference line, and the position of the measurement target point, the setting unit 12 may automatically set the angle measurement direction so that the measured angle does not exceed 180°.

[0045] The angle measurement direction, the position of the reference point, the direction of the reference line, and the position of the measurement target point set in step S2 are reflected by the output unit 14 superimposing them on the dynamic image displayed on the display unit 104. When the user sets the angle measurement direction, the position of the reference point, the direction of the reference line, and the position of the measurement target point via the operation unit 102, the output unit 14 simply changes the angle measurement direction, the positions of the reference point and the measurement target point, and the direction in which the reference line extends, displayed on the dynamic image, based on the operation received by the operation receiving unit 15. This allows the user to set the angle measurement direction, the position of the reference point, the direction of the reference line, and the position of the measurement target point with an intuitive operation.

[0046] As described above, the angle measurement direction indicates the direction in which the angle is measured during the angle measurement process, and specifically indicates whether the angle is measured in the clockwise direction or the counterclockwise direction.

[0047] The reference point is a point that indicates a reference position when measuring the angle of the measurement target point. The reference point may be set at a point on the musculoskeletal system, or may be set at a point in the dynamic image unrelated to the musculoskeletal system. When the reference point is set at a point on the musculoskeletal system, the position of the reference point in the dynamic image may move for each frame image in accordance with the movement of the musculoskeletal system. On the other hand, when the reference point is set unrelated to the musculoskeletal system, the position of the reference point in each frame image that makes up the dynamic image will be the same.

[0048] The reference line is a line extending from a reference point in a specific reference direction, and indicates 0° in angle measurement processing. In this embodiment, the reference direction is one of the right, left, up, or down directions, based on the up, down, left, and right directions of the dynamic image. In other words, when the measurement target point is on the reference line, the angle measurement result is 0°.

[0049] The measurement point indicates a specific position of the musculoskeletal system for which the angle is to be measured. In other words, since the measurement point is a point on the musculoskeletal system that appears in the dynamic image, the position of the measurement point in the dynamic image can move for each frame image in accordance with the movement of the musculoskeletal system.

[0050] Fig. 5 is a diagram showing an example of a display of a dynamic image, an angle measurement direction, a reference point, a reference line, and a measurement target point. Fig. 5 shows an example of a screen in which a reference point Pr, a reference line Lr, a measurement target point Pm, and an angle presentation line Lp for indicating the angle measurement direction are superimposed on a dynamic image. Fig. 5 shows a screen 200 displayed on the display unit 104 based on information output by the output unit 14.

[0051] As shown in Fig. 5, a screen 200 includes a dynamic image display area 201, a setting field 202, and a measurement result display field 203. In the example shown in Fig. 5, one frame of a dynamic image of a knee, as an example of a musculoskeletal system, photographed from the side of the body is displayed.

[0052] In the example shown in Fig. 5, the angle measurement direction is set clockwise. That is, when angle measurement processing is performed on the dynamic image shown in Fig. 5, the angle increases clockwise, with the right direction of the dynamic image being set as 0°. The reference point Pr is set at the distal part of the femur. The measurement target point Pm is set at a position slightly below the upper end of the tibia. The reference line Lr is set to extend to the right from the reference point Pr.

[0053] In the example shown in FIG. 5, in addition to the reference line Lr, angle indication lines Lp are displayed relatively thin to indicate the angle measurement directions, extending from the reference point Pr in the left, upward, and downward directions, respectively. It is desirable that the reference line Lr be displayed thicker than the angle indication lines Lp so that the user can easily recognize the specific directions that serve as the reference for angle measurement. Furthermore, in the example shown in FIG. 5, angle indications are displayed close to each angle indication line Lp. In the example shown in FIG. 5, the downward direction is 90°, the left direction is 180°, and the upward direction is 270°. The angle measurement directions may be displayed in the form of arrows other than the display format shown in FIG. 5, for example, as shown in FIG. 6 described below.

[0054] The reference direction in which the reference line Lr extends from the reference point Pr and the angle measurement direction shown in Figure 5 are just examples, and in the present disclosure, the reference direction in which the reference line Lr extends from the reference point Pr and the angle measurement direction can be freely set.

[0055] FIG. 6 shows examples of combinations of the reference direction in which the reference line Lr extends from the reference point Pr and the angle measurement direction, and examples of angle measurement results for each combination. FIG. 6A shows an example in which the reference direction in which the reference line Lr extends from the reference point Pr is leftward and the angle measurement direction is clockwise. FIG. 6B shows an example in which the reference direction in which the reference line Lr extends from the reference point Pr is leftward and the angle measurement direction is counterclockwise. FIG. 6C shows an example in which the reference direction in which the reference line Lr extends from the reference point Pr is rightward and the angle measurement direction is clockwise. FIG. 6D shows an example in which the reference direction in which the reference line Lr extends from the reference point Pr is rightward and the angle measurement direction is counterclockwise. FIG. 6E shows an example in which the reference direction in which the reference line Lr extends from the reference point Pr is upward and the angle measurement direction is clockwise. FIG. 6F shows an example in which the reference direction in which the reference line Lr extends from the reference point Pr is upward and the angle measurement direction is counterclockwise. Fig. 6G shows an example in which the reference direction in which the reference line Lr extends from the reference point Pr is downward and the angle measurement direction is clockwise, and Fig. 6H shows an example in which the reference direction in which the reference line Lr extends from the reference point Pr is downward and the angle measurement direction is counterclockwise.

[0056] 5 and 6, the reference direction is 0°, and measurements are possible up to 360° according to the angle measurement direction, but the present disclosure is not limited to this. For example, the reference direction may be an angle other than 0°, such as -90°. In this case, measurements are possible up to 270° according to the secured measurement direction.

[0057] Returning to the explanation of FIG. 5, the setting field 202 displays display objects that allow the user to make various settings related to the angle measurement process. In the example shown in FIG. 5, the setting field 202 includes a display object for setting a reference direction and a display object for setting an angle measurement direction. The user can easily set the reference point Pr and the angle measurement direction by selecting a desired location in the setting field 202 via, for example, the operation unit 102 (see FIG. 2). Note that the user can set the reference point Pr and the measurement target point Pm by directly moving the reference point Pr and the measurement target point Pm displayed in the dynamic image display area 201 via the operation unit 102.

[0058] The measurement result display field 203 will be described later.

[0059] Returning to the explanation of Figure 4, in step S3, the measurement unit 13 measures the angle between the reference line and the line segment connecting the reference point and the measurement target point for all frame images included in the dynamic image. The measurement unit 13 stores measurement result information indicating the measurement results in the storage unit 105 (see Figure 2).

[0060] The measurement unit 13 measures the angle according to the set direction of the reference line and the angle measurement direction, as shown in Fig. 6. In the example shown in Fig. 5, the angle θ formed between the reference line Lr and the line segment Lm connecting the reference point Pr and the measurement target point Pm is measured to be approximately 90°.

[0061] In step S4, the output unit 14 outputs the angle measurement results for all frame images. The output unit 14 may output the corresponding measurement results for each frame image, for example, in association with each other. The output unit 14 may also output the changes in the angle measurement results for all frame images included in the dynamic image in a graph format.

[0062] The measurement result display field 203 in Fig. 5 shows an example of the display of the measurement results. In the example shown in Fig. 5, the measurement result display field 203 includes the angle measurement result (89.25 degrees in the example shown in Fig. 5) in the dynamic image currently displayed on the screen 200, and a graph showing the change in the angle measurement results in all frame images included in the dynamic image. In this way, by displaying not only the angle measurement result in the displayed frame image but also the change in the angle measurement results in all frame images included in the dynamic image in a graph format, the user can intuitively recognize how the musculoskeletal system shown in the dynamic image is moving.

[0063] The above describes an example of operation when angle measurement processing is performed using one dynamic image newly generated by the dynamic image generation device 20. Note that, as another example of operation, the image processing device 10 may generate measurement results for the new dynamic image when, for example, a new dynamic image is acquired, and may also read angle measurement results for past dynamic images of the same musculoskeletal system of the same patient from the storage unit 105 or the like, and output the new measurement results in a format that allows comparison between the past measurement results. Specifically, for example, a graph showing the past measurement results and a graph showing the new measurement results may be displayed side by side.

[0064] For example, the position of the reference point, the reference direction of the reference line, and / or the angle measurement direction may differ between the angle measurement process using a previous dynamic image and the angle measurement process using a new dynamic image. In such cases, the acquisition unit 11 of the image processing device 10 further acquires previous dynamic images of the same subject and previous settings that serve as the reference for angle measurement in the previous dynamic images. The measurement unit 13 then performs a new angle measurement process on the new dynamic image using the previous settings. This allows the results of angle measurement using the same settings to be compared between the previous dynamic image and the new dynamic image, thereby enabling more accurate diagnosis of changes in the subject's musculoskeletal movement over time. The measurement unit 13 may also redo the angle measurement process on the previous dynamic image using the settings for angle measurement on the new dynamic image set by the setting unit 12.

[0065] <Actions and Effects> As described above, the image processing device 10 according to an embodiment of the present disclosure includes an acquisition unit 11 that acquires a dynamic image, a setting unit 12 that sets the direction of angle measurement in the dynamic image, and a measurement unit 13 that measures the angle formed in the direction set by the setting unit 12 between a reference line that serves as the basis for angle measurement and a line segment that includes a measurement point that is the target of angle measurement, in each of a plurality of frame images included in the dynamic image.

[0066] With this configuration, when measuring an angle using a dynamic image, it is possible to perform angle measurement processing in the desired angle measurement direction, and to prevent an angle not intended by the user from being measured.

[0067] Furthermore, according to the image processing device 10 according to the embodiment of the present disclosure, the setting unit 12 further sets the positions of the reference points, the direction of the reference lines, and the positions of the measurement points. This makes it possible to accurately set the reference points and reference lines that serve as the basis for angle measurement, as well as the measurement points that are set inside the musculoskeletal system and that are the targets of angle measurement, for each dynamic image. This allows for accurate angle measurement of the musculoskeletal system captured in the dynamic image.

[0068] Furthermore, according to the image processing device 10 according to the embodiment of the present disclosure, the setting unit 12 performs settings that are applied to all frame images of a dynamic image.

[0069] With this configuration, it is not necessary to perform the setting for each frame image, thereby reducing the time and effort required for the setting.

[0070] Moreover, the image processing device 10 according to the embodiment of the present disclosure further includes an operation receiving unit 15 that receives an operation input for setting the setting unit 12.

[0071] With this configuration, the user can perform settings for angle measurement processing with a simple operation.

[0072] Furthermore, according to the image processing device 10 according to the embodiment of the present disclosure, the acquisition unit 11 further acquires additional information related to the musculoskeletal system shown in the dynamic image, and the setting unit 12 performs setting based on the additional information.

[0073] With this configuration, the setting unit 12 automatically performs the setting based on the additional information, thereby reducing the effort required for the user to perform the setting.

[0074] Moreover, the image processing device 10 according to the embodiment of the present disclosure further includes an output unit 14 that outputs reference information indicating the reference points and reference lines in association with the dynamic image.

[0075] This configuration allows the user to accurately recognize the angle measurement results.

[0076] Furthermore, according to the image processing device 10 according to the embodiment of the present disclosure, the output unit 14 outputs angle information indicating the measured angle in association with the corresponding frame image.

[0077] With this configuration, the user can easily understand the angle measurement results in the displayed dynamic image.

[0078] Furthermore, according to the image processing device 10 relating to an embodiment of the present disclosure, the acquisition unit 11 further acquires past dynamic images of the same subject and past settings that serve as the basis for angle measurement in the past dynamic images, and the measurement unit 13 measures a new dynamic image based on the past dynamic images and the past settings.

[0079] Alternatively, according to the image processing device 10 according to the embodiment of the present disclosure, the measurement unit 13 measures the angles in each of the dynamic image and the past dynamic image based on the setting by the setting unit 12 .

[0080] According to the image processing device 10 according to the embodiment of the present disclosure, the output unit 14 outputs the result of measurement based on the dynamic image and the result of measurement based on the past dynamic image in association with each other.

[0081] With this configuration, it is possible to accurately diagnose the effects of the same musculoskeletal system of the same subject over time.

[0082] <Modification> The above-described embodiment is merely an example of the present disclosure, and various modifications of the present disclosure are possible. In the above-described embodiment, the image processing device 10 acquires dynamic images showing the musculoskeletal system and performs measurement processing using the acquired dynamic images. The present disclosure is not limited to this, and can be applied to image processing devices that handle dynamic images other than those showing the musculoskeletal system. [Industrial Applicability]

[0083] The present disclosure is useful for an image processing device that performs angle measurement processing using dynamic images. [Explanation of symbols]

[0084] 1 Radiography system 10 Image processing device 101 Control section 102 Operation section 103 Communications Department 104 Display section 105 Storage section Bus 106 11 Acquisition Department 12 Setting section 13 Measurement section 14 Output section 15 Operation reception section 20 Dynamic image generation device 30 Image server device 200 Current Screen 201 Dynamic image display area 202 Settings 203 Measurement result display field

Claims

1. an acquisition unit for acquiring dynamic images; a setting unit that sets a direction of angle measurement in the dynamic image; a measurement unit that measures an angle formed between a reference line that is a reference for the angle measurement and a line segment that includes a measurement point that is a target of the angle measurement, in a direction set by the setting unit, in each of a plurality of frame images included in the dynamic image; An image processing device comprising:

2. the setting unit further sets the position of a reference point that is a starting point from which the reference line extends, the direction of the reference line, and the position of the measurement point; The image processing device according to claim 1 .

3. the setting unit performs the setting to be applied to all frame images of the dynamic image. The image processing device according to claim 1 .

4. further comprising an operation receiving unit that receives an operation input for the setting of the setting unit; The image processing device according to claim 1 .

5. The acquisition unit further acquires supplementary information related to the musculoskeletal system shown in the dynamic image, The setting unit performs the setting based on the additional information. The image processing device according to claim 1 .

6. an output unit that outputs a reference point, which is a starting point of the reference line, and reference information indicating the reference line in association with the dynamic image; The image processing device according to claim 1 .

7. the output unit outputs angle information indicating the measured angle in association with the corresponding frame image. The image processing device according to claim 6 .

8. the acquisition unit further acquires past dynamic images of the same subject having musculoskeletal system shown in the dynamic images, and past settings that serve as a reference for angle measurement in the past dynamic images; the measurement unit performs the measurement of the dynamic image based on the past dynamic image and the past setting; The image processing device according to claim 1 .

9. the measurement unit measures the angle in each of the dynamic image and the past dynamic image based on the setting by the setting unit; The image processing device according to claim 8 .

10. an output unit that outputs the result of the measurement based on the dynamic image and the result of the measurement based on the past dynamic image in association with each other; 10. An image processing device according to claim 8 or 9.

11. Acquire dynamic images, setting a direction of angle measurement in the dynamic image; measuring an angle formed in a set direction between a reference line serving as a reference for the angle measurement and a line segment including a measurement point that is a target of the angle measurement, in each of a plurality of frame images included in the dynamic image; Methods for measuring angles in dynamic images.

Images