Radiographic apparatus

Abstract

The present invention provides a radiographic apparatus comprising: a main body; a C-arm frame connected to the main body; a radiation generator provided at one end of the C-arm frame; a radiation detector provided at the other end of the C-arm frame; a moving unit for transversely moving the C-arm frame from a first point to a second point in a direction parallel to the main body; a scanning unit for rotating the C-arm frame in a direction perpendicular to the main body; and a control unit for controlling the moving unit and the scanning unit.

Description

Radiation imaging device

[0001] The present invention relates to a radiation imaging device, and in particular, to a radiation imaging device equipped with a C-arm.

[0002]

[0003] The present invention was filed as a result of the following national research and development project.

[0004] [National R&D projects that supported this invention]

[0005] [Project ID] 1711194272

[0006] [Project No.] KD000016 (RS-2020-KD000016)

[0007] [Ministry Name] Multi-ministry (Ministry of Science and ICT, Ministry of Trade, Industry and Energy, Ministry of Health and Welfare,

[0008] Ministry of Food and Drug Safety

[0009] [Name of Project Management (Specialized) Agency] Pan-Governmental Medical Device Research & Development Foundation

[0010] [Research Project Name] Pan-Governmental Full-Cycle Medical Device R&D (Ministry of Science and ICT, Ministry of Trade, Industry and Energy, Ministry of Health and Welfare)

[0011] [Project Title] Development of a 3D Navigation Integrated Low-Dose C-Arm CT System

[0012] [Name of Project Performing Organization] Genoray Co., Ltd.

[0013] [Research Period] 2020.09.01 ~ 2024.12.31

[0014] Generally, a radiography (X-ray) device equipped with a C-arm is an important device that utilizes radiation during surgeries in fields such as neurosurgery, orthopedics, and urology to diagnose and compare the condition of the affected area before and during surgery by capturing images or displaying the patient's surgical progress.

[0015] In this regard, a conventional radiographic device equipped with a C-arm is described with reference to the drawings.

[0016] FIG. 1 is a drawing illustrating the shooting operation of a conventional radiographic device equipped with a C-arm, and FIG. 2 is a drawing illustrating a radiographic image taken according to the shooting operation of FIG. 1.

[0017] As illustrated in FIG. 1, a conventional radiation imaging device equipped with a C-arm has a radiation generator (10) that generates radiation and a radiation detector (20) that detects radiation generated from the radiation generator (10) connected to an alphabet C-shaped C-arm frame (30).

[0018] The above C-arm frame (30) is connected to a rotating shaft provided in front of the rotating block (51) of the main body (50). Accordingly, the radiation imaging device equipped with the above C-arm causes the radiation generator (10) to radiate radiation to a patient while the C-arm frame (30) rotates at a constant angle from a reference angle by means of the rotating shaft, and the radiation that has passed through the patient is detected by the radiation detector (20), processed into an image in the main body (50), and then the processed image is displayed through a display (not shown).

[0019] However, according to the radiation equipped with such a conventional C-arm, when the C-arm frame (30) is rotated by a rotation shaft, the height of the image capture position changes due to the rotation, and there is a problem in that the affected area does not align with the central axis of the radiation generator (10) and the radiation detector (20) connected to the C-arm frame (30).

[0020] Accordingly, as shown in FIG. 2, the center axis of the radiation images captured at each rotational position of the C-arm frame (30) is misaligned, and there is a problem that it is difficult to align these radiation images. That is, there is a problem that the radiation images must be rotated in order to align these radiation images.

[0021]

[0022] To solve the aforementioned problems, the purpose is to provide a radiographic device that can expand the field of view (FOV) in the horizontal direction without rotating the radiographic image or moving the radiographic device, and can identify more vertebrae due to the wide field of view.

[0023] However, the problems that the present invention aims to solve are not limited to those mentioned above, and other unmentioned problems will be clearly understood by those skilled in the art from the description below.

[0024]

[0025] To solve the aforementioned problem, the present invention provides a radiation imaging device comprising: a main body; a C-arm frame connected to the main body; a radiation generator provided at one end of the C-arm frame; a radiation detector provided at the other end of the C-arm frame; a moving part that moves the C-arm frame laterally from a first point to a second point in a direction parallel to the main body; a scanning part that rotates the C-arm frame in a direction perpendicular to the main body; and a control part that controls the moving part and the scanning part.

[0026] The control unit can generate a first scan image by rotating the C-arm frame in a first direction at the first point, and generate a second scan image by moving the C-arm frame from the first point to a second point and then rotating it in a second direction.

[0027] The control unit can generate a third scan image by rotating the C-arm frame in a first direction between the first point and the second point.

[0028] The above control unit can align the first scan image and the second scan image to generate a aligned image.

[0029] The control unit can detect an overlapping area between the first scan image and the second scan image.

[0030] The control unit above can remove the overlapping region from either the first scan image or the second scan image.

[0031] The control unit above can generate the matching image by continuously joining the first scan image and the second scan image.

[0032] The radiation imaging device of the present invention may further include an input unit for selecting the first point and the second point.

[0033]

[0034] According to the present invention, by dual scanning the patient through parallel movement of the C-arm, the field of view (FOV) can be expanded in the horizontal direction without rotating the radiation image or moving the radiation imaging device, and there is an advantage of being able to identify more vertebrae due to securing a wide field of view.

[0035] The effects obtainable from the present invention are not limited to those mentioned above, and other unmentioned effects will be clearly understood by those skilled in the art from the description below.

[0036]

[0037] FIG. 1 is a drawing illustrating the shooting operation of a radiographic device equipped with a conventional C-arm.

[0038] Figure 2 is a diagram illustrating a radiation image taken according to the shooting operation of Figure 1.

[0039] FIG. 3 is a perspective view of a radiation imaging device according to a first embodiment of the present invention.

[0040] Figure 4 is a cross-sectional view taken along AA of Figure 3.

[0041] Figure 5 is a cross-sectional view taken along BB of Figure 3.

[0042] FIG. 6 is a perspective view showing a radiation imaging device according to a preferred second embodiment of the present invention.

[0043] Figure 7 is a cross-sectional view taken along CC of Figure 6.

[0044] FIG. 8 is a block diagram of a C-arm control device according to an embodiment of the present invention.

[0045] FIG. 9 is a diagram illustrating various operations of a C-arm according to an embodiment of the present invention.

[0046] FIG. 10 is a diagram illustrating the dual scanning operation of a C-arm according to an embodiment of the present invention.

[0047] Figures 11 and 12 illustrate radiation images taken according to the dual scanning operation of Figure 10.

[0048]

[0049] The above-mentioned objectives, means, and resulting effects of the present invention will become clearer through the following detailed description in conjunction with the attached drawings, and accordingly, a person skilled in the art to which the present invention pertains will be able to easily implement the technical concept of the present invention. Furthermore, in describing the present invention, if it is determined that a detailed description of known technology related to the present invention may unnecessarily obscure the essence of the present invention, such detailed description will be omitted.

[0050] The terms used herein are for describing the embodiments and are not intended to limit the invention. In this specification, the singular form includes the plural form as appropriate unless specifically stated otherwise in the text. In this specification, terms such as “comprising,” “providing,” “arranging,” or “having” do not exclude the presence or addition of one or more other components in addition to the components mentioned.

[0051] In this specification, terms such as “or,” “at least one,” etc., may represent one of the words listed together or a combination of two or more. For example, “or B” and “at least one of B” may include only one of A or B, or may include both A and B.

[0052] In this specification, descriptions following “e.g.” should not limit the embodiments of the invention according to various embodiments of the invention, such as variations including tolerances, measurement errors, limits of measurement accuracy, and other commonly known factors, as the information presented, such as cited characteristics, variables, or values, may not exactly match.

[0053] In this specification, where it is stated that a component is 'connected' or 'connected' to another component, it should be understood that it may be directly connected or connected to the other component, or that there may be other components in between. On the other hand, when it is mentioned that a component is 'directly connected' or 'directly connected' to another component, it should be understood that there are no other components in between.

[0054] In this specification, where a component is described as being 'on' or 'in contact' with another component, it should be understood that it may be in direct contact with or connected to the other component, but that another component may exist in between. On the other hand, where a component is described as being 'immediately above' or 'in direct contact' with another component, it should be understood that no other component exists in between. Other expressions describing the relationship between components, such as 'between' and 'directly between', may be interpreted in the same way.

[0055] In this specification, terms such as 'first,' 'second,' etc., may be used to describe various components, but such components should not be limited by these terms. Furthermore, these terms should not be interpreted as limiting the order of each component, but may be used for the purpose of distinguishing one component from another. For example, 'first component' may be named 'second component,' and similarly, 'second component' may be named 'first component.'

[0056] Unless otherwise defined, all terms used in this specification may be used in a meaning commonly understood by those skilled in the art to which the present invention pertains. Additionally, terms defined in commonly used dictionaries are not to be interpreted ideally or excessively unless explicitly and specifically defined otherwise.

[0057]

[0058] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings.

[0059] In describing the present invention, if it is determined that a detailed description of related known functions or configurations could unnecessarily obscure the essence of the invention, such detailed description will be omitted.

[0060] FIG. 3 is a perspective view of a radiation imaging device according to a first embodiment of the present invention, FIG. 4 is a cross-sectional view cut along AA of FIG. 3, and FIG. 5 is a cross-sectional view cut along BB of FIG. 3.

[0061] As illustrated in FIG. 3, a radiation imaging device (100) according to the first embodiment of the present invention may be configured to include a main body (110), a C-arm (120), and a C-arm moving part (130).

[0062] Although not shown in the drawing, the interior of the main body (110) is equipped with a power supply unit for supplying power to the C-arm (120) and the C-arm moving unit (130), and a control unit for controlling and processing the operation and data of the C-arm (120) and the C-arm moving unit (130), and a C-arm lifting unit (111), such as an actuator or a hydraulic cylinder, for supporting and lifting the C-arm moving unit (130).

[0063] Additionally, the main body (110) is supported by a support (113) provided at the bottom, and can be moved by a plurality of wheels mounted on the bottom of the support (113).

[0064] The C-arm (120) may be configured to include a C-arm frame (121) connected to the front of the main body (110), a radiation generator (123) provided at one end (lower inner side) of the C-arm frame (121), and a radiation detector (125) provided at the other end (upper inner side) of the C-arm frame (121).

[0065] A C-arm (120) has a radiation generator (123) and a radiation detector (125) positioned opposite each other at both ends of a C-arm frame (121) having the shape of the letter C. Here, the C-arm frame (121) is connected to a support shaft (132) of a C-arm moving part (130) to be described later, and is installed to be movable left and right.

[0066] As shown in FIGS. 4 and 5, the C-arm moving part (130) is provided with an input part (130a) having a plurality of function keys electrically connected to the control part of the main body (110) outside the casing, and a moving block (131) is coupled to the C-arm lifting part (111) of the main body (110) so that it can move up and down.

[0067] Here, the moving block (131) is supported by the C-arm lifting part (111) of the main body (110) by the support plate (133) and rises or falls, and a pair of guide bars (135) having guide grooves (134) on both sides in the longitudinal direction of the support plate (133) are installed on the support plate (133).

[0068] Additionally, a pair of sliding parts (136) having guide protrusions corresponding to the guide groove (134) of the guide bar (135) are installed at the lower part of the moving block (131), and the moving block (131) moves along the guide bar (135) while in contact with the guide bar (135) by the sliding parts (136).

[0069] Additionally, a first rack gear (137) is installed between the pair of sliding parts (136) at the bottom of the moving block (131), and a solenoid (139) having a shaft (138) with protrusions that can mesh with the first rack gear (137) is installed between the pair of guide bars (135) on the support plate (133).

[0070] Here, when power is applied to the solenoid (139), the shaft (138) of the solenoid (139) moves below the center axis (-Y direction) of the solenoid (139) by electromagnetic force, as shown in FIGS. 4 and 5, and accordingly, the sliding part (136) of the moving block (131) can be moved along the guide bar (135).

[0071] Additionally, when the power to the solenoid (139) is cut off, the shaft (138) of the solenoid (139) moves along the center axis (+Y direction) of the solenoid (139) by electromagnetic force, as shown in FIGS. 4 and 5, and accordingly, the uneven part of the shaft (138) engages with the first rack gear (137) of the moving block (131), and the moving block (131) stops playing at a predetermined position.

[0072] Hereinafter, the operation and effects of the radiation imaging device (100) having the above-described configuration will be explained.

[0073] If the affected area does not align with the central axis of the radiation generator (123) and radiation detector (125) of the above C-arm frame (121), or if the radiation examination location needs to be moved as the surgery progresses, power is supplied using a switch of the input unit (130a) which functions to supply or cut off power to the solenoid (139) of the C-arm moving unit (130) as shown in FIG. 4.

[0074] Here, when power is supplied to the solenoid (139), the shaft (138) that was engaged with the first rack gear (137) provided at the bottom of the moving block (131) is pulled downward (-Y direction) along the center axis of the solenoid (139) by electromagnetic force, as shown in FIGS. 4 and 5.

[0075] Accordingly, when force is applied by a user to move the C-arm moving part (130) to a predetermined position (+- X direction) using a support shaft (132) coupled to the moving block (131) of the C-arm moving part (130) or a handle provided on the support shaft (132), the sliding part (136) at the bottom of the moving block (131) moves to a predetermined position (+- X direction) along the guide groove (134) of the guide bar (135) formed on the upper part of the support plate (133).

[0076] After the C-arm frame (121) is moved to a predetermined position (+- X direction), the power supplied to the solenoid (139) of the C-arm moving part (130) is cut off. When the power supplied to the solenoid (139) is cut off, the shaft (138) pulled downward (-Y direction) of the solenoid (139)'s central axis rises upward (+Y direction) of the solenoid (139)'s central axis, and as shown in FIG. 4, the uneven part of the shaft (138) of the solenoid (139) engages with the first rack gear (137) provided at the bottom of the moving block (131), thereby preventing unnecessary play in the moving block (131).

[0077] Accordingly, if the affected area does not coincide with the central axis of the radiation generator (123) and radiation detector (125) of the C-arm frame (121), fine adjustment of the central axis of the radiation generator (123) and radiation detector (125) of the C-arm frame (121) is possible by moving the movable block (131), and an accurate image of the affected area can be obtained without moving a patient or animal with limited mobility.

[0078] As described above, the radiation imaging device (100) according to the first embodiment of the present invention has a guide bar (135) installed on the upper part of a support plate (133), and the movable block (131) can be moved by a user along the guide groove (134) of the guide bar (135) via a sliding part (136) provided on the lower surface of the movable block (131).

[0079] After the movement of the above-mentioned moving block (131), the uneven portion of the shaft (138) provided in the solenoid (139) engages with the first rack gear (137) of the moving block (131), thereby fixing the C-arm frame (121) in a predetermined position, so that stable imaging can be performed during radiation imaging.

[0080] As described above, according to the first preferred embodiment of the present invention, the radiation imaging device (100) is configured such that, after manually moving the moving block (131), a solenoid (139) is installed on a support plate (133) having a shaft (138) having an uneven surface corresponding to a rack gear provided below the moving block (131) to fix the position of the moving block (131).

[0081] Meanwhile, a preferred second embodiment of the present invention capable of controlling the horizontal movement of a moving block will be described below.

[0082] In a preferred second embodiment of the present invention, the description of parts having the same configuration and function as in the first embodiment is omitted.

[0083] FIG. 6 is a perspective view showing a radiographic device according to a preferred second embodiment of the present invention, and FIG. 7 is a cross-sectional view taken along CC of FIG. 6.

[0084] As illustrated in FIGS. 6 and 7, a pinion gear (140a) having a pitch corresponding to a second rack gear (137a) installed at the bottom of a moving block (131) is coupled to a motor (140), which is a driving means connected to a control unit. Here, the motor (140) is installed on a support plate (133).

[0085] In this case, it is preferable that the motor (140) be a stepper motor to accurately control the rotation angle.

[0086] Accordingly, when moving the above-mentioned moving block (131), the solenoid (139) is first operated to separate the shaft (138) having an uneven surface from the first rack gear (137). Then, the motor (140) transmits driving force to the pinion gear (140a) by means of the power connected to the motor (140). At this time, the rotational force of the pinion gear (140a) transmits horizontal movement force to the second rack gear (137a) installed at the bottom of the moving block (131), thereby allowing the moving block (131) to be moved to a predetermined horizontal movement position.

[0087] Additionally, after the moving block (131) is moved to a predetermined horizontal moving position, the solenoid (139) is raised so that the uneven portion of the shaft (138) engages with the first rack gear (137).

[0088] Accordingly, the radiation imaging device (100) according to the preferred second embodiment of the present invention can move the moving block to a horizontal position more accurately and easily than the first embodiment.

[0089] FIG. 8 is a block diagram of a C-arm control device according to an embodiment of the present invention, FIG. 9 is a diagram illustrating various operations of a C-arm according to an embodiment of the present invention, FIG. 10 is a diagram illustrating dual scanning operations of a C-arm according to an embodiment of the present invention, and FIG. 11 and FIG. 12 are diagrams illustrating radiation images captured according to the dual scanning operations of FIG. 10.

[0090] Referring to FIG. 8, the C-arm control device (200) according to the present invention includes a communication unit (210), a display device (220), and a control unit (230).

[0091] The communication unit (210) is used to receive sensor information to detect the movement of the C-arm (120) and surrounding information.

[0092] The C-arm (120) can be moved horizontally or parallelly by the moving part (130), and can be raised vertically by the lifting part (111). Additionally, the C-arm (120) can be orbital and obliquely rotated by the scanning part (180).

[0093] The movement of such a C-arm (120) can be detected by a sensor, and the sensor information can be received through the communication unit (210).

[0094] The sensor can detect not only the movement information of the C-arm (120) but also surrounding information of the C-arm (120), such as information related to the patient table or the patient on the patient table.

[0095] The sensor may include, but is not limited to, a gyroscope sensor for detecting the movement of the C-arm (120), a motor position sensor for detecting the movement of the motor that is the driving part of the C-arm (120), and a distance sensor for measuring the distance between the C-arm (120) and the surrounding environment.

[0096] Additionally, the sensor may include a camera, and in particular, may include a 3D camera to detect the distance between the C-arm (120) and the patient.

[0097] These sensors may exist separately from the C-arm control device (200) according to the present invention or may be included in the C-arm control device (200).

[0098] The communication unit (210) for receiving sensor information can perform wireless communication such as 5G (5th generation communication), LTE-A (long term evolution-advanced), LTE (long term evolution), Bluetooth, BLE (Bluetooth low energy), NFC (near field communication), and WiFi communication, or wired communication such as cable communication, but is not limited thereto.

[0099] The display device (220) may include a display section (220b) and an input section (220a).

[0100] That is, the display device (220) may be a touchscreen display capable of displaying and inputting simultaneously.

[0101] The display unit (220b) displays the movement of the C-arm (120) and may be composed of a non-luminous panel or a luminous panel.

[0102] For example, the display unit (220b) may include a liquid crystal display (LCD), a light emitting diode (LED) display, an organic light emitting diode (OLED) display, a micro electro mechanical systems (MEMS) display, or an electronic paper display, but is not limited thereto.

[0103] The input unit (220a) is used to receive input from the user (1). That is, it is used to receive touch input or drag input, etc., so that the user (1) can control the movement of the C-arm (120).

[0104] The control unit (230) may be configured to include one or more processors (232) and memory (234).

[0105] The control unit (230) displays the C-arm (120) on the display unit (220b), receives a control signal for controlling the C-arm (120) from the user (1) through the input unit (220a), displays the movement of the C-arm (120) on the display unit (220b), and drives the actual C-arm (120).

[0106] The memory (234) stores various information necessary for the operation of the control unit (230). The information stored in the memory (234) may include various sensor information received through the communication unit (210), program information related to the C-arm (120) control method described later in the control unit (230), but is not limited thereto.

[0107] For example, the memory (234) may include, depending on its type, a hard disk type, a magnetic media type, a CD-ROM (compact disc read only memory), an optical media type, a magneto-optical media type, a multimedia card micro type, a flash memory type, a ROM type (read only memory type), or a RAM type (random access memory type), but is not limited thereto. Additionally, depending on its use / location, the memory (154) may be a cache, a buffer, a main memory, or an auxiliary memory, or a separately provided storage system, but is not limited thereto.

[0108] Referring to FIGS. 9 to 11, the C-arm moving part (130) can move the C-arm frame (121) laterally from a first point to a second point in a direction parallel to the main body (110).

[0109] The scanning unit (180) can rotate the C-arm frame (121) in a direction perpendicular to the main body (110).

[0110] The control unit (230) can control the C-arm moving unit (130) and the scanning unit (180) to make the C-arm (120) perform a dual scanning operation or a single scanning operation.

[0111] Specifically, when the control unit (230) performs a dual scanning operation of the C-arm (120), it can generate a first scan image (I1) by rotating the C-arm frame (121) from a first point in a first direction (e.g., clockwise) and generate a second scan image (I2) by moving the C-arm frame (121) from the first point to a second point and then rotating it in a second direction opposite to the first direction (e.g., counterclockwise) (2nd scan).

[0112] Accordingly, as illustrated in FIG. 11, the central axes of the radiation images captured at each lateral movement position of the C-arm frame (121) coincide, making it easy to align these radiation images. That is, the radiation imaging device (100) according to the embodiment of the present invention does not need to rotate the radiation images to align them.

[0113] The control unit (230) can align the first scan image (I1) and the second scan image (I2) to generate a aligned image.

[0114] Specifically, the control unit (230) can detect an overlapping area (O) between the first scan image (I1) and the second scan image (I2).

[0115] The control unit (230) can remove the overlapping area (O) from either the first scan image (I1) and the second scan image (I2).

[0116] The control unit (230) can generate a matching image by continuously concatenating the first scan image (I1) and the second scan image (I2) from which the overlapping area (O) has been removed, or generate a matching image by continuously concatenating the second scan image (I2) and the first scan image (I1) from which the overlapping area (O) has been removed.

[0117] As such, the radiation imaging device according to the embodiment of the present invention can expand the field of view (FOV) in the horizontal direction without rotating the radiation image or moving the radiation imaging device (100) by dual scanning the patient through parallel movement of the C-arm (120), and has the advantage of being able to identify more vertebrae due to securing a wide field of view.

[0118] The display device (220) may provide an interface for selecting a first point and a second point. For example, if the display unit (220b) is implemented as a touch screen, the user may select a shooting area by dragging, clicking, etc. Additionally, the user may directly select from a list of sizes of the shooting area through the input unit (220a).

[0119] The display device (220) can provide an interface for selecting the dual scanning operation and single scanning operation of the C-arm.

[0120] Here, the user can select a single scanning operation and select a shooting range through the input unit (220a) or the display unit (220b).

[0121] Accordingly, the control unit (230) can generate a third scan image by rotating the C-arm frame (120) in a first direction at a selected point between the first point and the second point.

[0122] Additionally, the user can select a dual scanning operation and a shooting range through the input unit (220a) or the display unit (220b).

[0123] Accordingly, the control unit (230) can move and rotate the C-arm frame (121) to acquire the first scan image (I1) and the second scan image (I2), and generate an aligned image.

[0124] When a user selects a shooting range through the input unit (220a) or the display unit (220b), the control unit (230) can determine one of the dual scanning operation and single scanning operation of the C-arm according to the field of view (FOV) of the shooting range.

[0125] For example, the control unit (230) can perform a single scanning operation if the shooting range selected by the user is less than the reference range, and perform a dual scanning operation if the shooting range selected by the user is greater than or equal to the reference range. Accordingly, convenience can be provided to the user.

[0126]

[0127] Although specific embodiments have been described in the detailed description of the present invention, it is understood that various modifications are possible within the scope of the invention. Therefore, the scope of the present invention is not limited to the described embodiments but should be defined by the claims set forth below and equivalents thereof.

[0128]

[0129] The radiation imaging device according to the present invention can be used in various fields, such as the medical field.

Claims

1. Main body; A C-arm frame connected to the main body above; A radiation generator provided at one end of a C-arm frame; Radiation detector provided at the other end of the C-arm frame; A moving part that laterally moves the above C-arm frame from a first point to a second point in a direction parallel to the main body; and A scanning unit that rotates the above C-arm frame in a direction perpendicular to the main body; and A control unit that controls the above-mentioned moving unit and the above-mentioned scanning unit A radiographic device including 2. In Paragraph 1, The above control unit A first scan image is generated by rotating the C-arm frame in a first direction at the first point, and a second scan image is generated by moving the C-arm frame from the first point to a second point and then rotating it in a second direction. Radiation imaging device.

3. In Paragraph 1, The above control unit A third scan image is generated by rotating the above C-arm frame in a first direction between the first point and the second point. Radiation imaging device.

4. In Paragraph 2, The above control unit A registered image is generated by aligning the first scan image and the second scan image. Radiation imaging device.

5. In Paragraph 4, The above control unit Detecting an overlapping area between the first scan image and the second scan image Radiation imaging device.

6. In Paragraph 5, The above control unit Removing the overlapping region from either of the first scan image and the second scan image Radiation imaging device.

7. In Paragraph 6, The above control unit The first scan image and the second scan image are continuously joined to generate the alignment image. Radiation imaging device.

8. In Paragraph 1, Input unit for selecting the above-mentioned first point and the above-mentioned second point A radiographic device further comprising

Images