阅读说明：本技术 放射线摄影装置 (Radiographic apparatus ) 是由 斋藤淳夫 于 2020-10-19 设计创作，主要内容包括：本发明提供一种放射线摄影装置,能够实现简易的结构且能够容易地使放射线照射部和放射线检测部在执行放射线摄影的摄影位置与从摄影位置退避后的退避位置之间移动。臂移动机构具备：第一转动构件,其设置于基台,能够以与该基台垂直的第一旋转轴为中心进行转动；第二转动构件,其设置于第一转动构件,能够以与基台垂直的第二旋转轴为中心进行转动；C型臂支承架,其设置于第二转动构件,能够以与基台垂直的第三旋转轴为中心进行转动；马达,该马达使这些部分转动。通过第一转动构件、第二转动构件和C型臂支承架的转动来使C型臂移动,以使放射线照射部和放射线检测部在执行放射线摄影的摄影位置与从所述摄影位置退避后的退避位置之间线性移动。(The invention provides a radiographic apparatus which can realize a simple structure and can easily move a radiation irradiation part and a radiation detection part between an imaging position for executing radiography and a retreating position retreated from the imaging position. The arm moving mechanism includes: a first rotating member provided on the base and rotatable about a first rotation axis perpendicular to the base; a second rotating member provided on the first rotating member and rotatable about a second rotation axis perpendicular to the base; a C-shaped arm support which is provided on the second rotating member and can rotate around a third rotating shaft perpendicular to the base; a motor that rotates the portions. The C-arm is moved by rotation of the first and second rotating members and the C-arm support so that the radiation irradiation section and the radiation detection section are linearly moved between an imaging position at which radiography is performed and a retracted position retracted from the imaging position.)

1. A radiographic apparatus includes a base, a radiation irradiating section, a radiation detecting section, an arm that supports the radiation irradiating section and the radiation detecting section in a state in which they face each other, and an arm moving mechanism that moves the arm,

the arm moving mechanism includes:

a first rotating member provided on the base and rotatable about a first rotation axis perpendicular to the base;

a second rotating member provided on the first rotating member and rotatable about a second rotation axis perpendicular to the base;

a third rotating member provided on the second rotating member, rotatable about a third rotation axis perpendicular to the base, and supporting the arm; and

a rotating member rotating mechanism that rotates the first rotating member, the second rotating member, and the third rotating member,

the radiographic imaging apparatus further includes a rotation control unit that controls the rotation member rotation mechanism so that the radiation irradiation unit and the radiation detection unit move linearly between an imaging position at which radiographic imaging is performed and a retracted position retracted from the imaging position.

2. The radiographic imaging apparatus according to claim 1, further comprising:

a examination table having a subject placement section for placing a subject thereon and a placement section rotating mechanism for rotating the subject placement section around a fourth rotation axis perpendicular to the base; and

a second rotation control section that controls the rotating member rotating mechanism and the placing section rotating mechanism so that the radiation irradiation section and the radiation detection section move between the imaging position and the retracted position along a body axis of a subject placed on the subject placing section.

3. The radiographic imaging apparatus according to claim 1, further comprising:

a examination table having a subject placement section for placing a subject thereon and a placement section rotating mechanism for rotating the subject placement section around a fourth rotation axis perpendicular to the base; and

a second rotation control section that controls the rotating member rotating mechanism and the placing section rotating mechanism so as to move the radiation irradiation section and the radiation detection section between the imaging position and the retracted position in a direction intersecting a body axis of a subject placed on the subject placing section.

4. The radiographic apparatus according to claim 1,

the base station is fixed on the horizontal plane.

5. The radiographic apparatus according to claim 2,

the base station is fixed on the horizontal plane.

6. The radiographic apparatus of claim 3,

the base station is fixed on the horizontal plane.

Technical Field

The present invention relates to a radiographic apparatus.

Background

As one type of radiographic apparatus, there is an X-ray imaging apparatus for performing X-ray fluoroscopy or X-ray imaging (hereinafter, these are collectively referred to as "X-ray imaging") in the case of performing an examination or an operation such as a circulator system. Such an X-ray imaging apparatus includes: an X-ray irradiation unit provided with an X-ray tube; an X-ray detector including an X-ray detector such as a flat panel detector that detects X-rays that have been irradiated from the X-ray irradiation unit onto the subject and have passed through the subject; and a C-shaped arm which is approximately C-shaped and is used for supporting the X-ray irradiation part and the X-ray detection part. The C-arm can be moved in the sliding direction, rotated, and horizontally moved by the C-arm moving mechanism. The X-rays detected by the X-ray detector are displayed on a display unit such as a liquid crystal display panel as a fluoroscopic image of the subject.

Patent document 1 discloses an X-ray diagnostic apparatus in which a C-shaped arm is moved by an arm moving mechanism having a two-axis link mechanism. Patent document 2 discloses a radioscopy apparatus in which a C-arm is moved in two directions orthogonal to each other along a rail disposed at the ceiling of an examination room.

Documents of the prior art

Patent document

Patent document 1: japanese patent laid-open No. 2008-86836

Patent document 2: japanese patent laid-open publication No. 2017-118910

Disclosure of Invention

Problems to be solved by the invention

For example, when performing X-ray fluoroscopy using a catheter, it is sometimes necessary to perform a surgical operation on a subject. In such a case, it is necessary to retract the X-ray irradiation unit and the X-ray detection unit disposed at the imaging positions above and below the subject from the imaging positions. In such a case, conventionally, the X-ray irradiation unit and the X-ray detection unit are retracted from the imaging position by rotating the C-arm.

Fig. 9 and 10 are explanatory diagrams showing a retracting operation of retracting the X-ray irradiation unit and the X-ray detection unit from the imaging position by rotating the C-arm 84.

Fig. 9 shows a state in which X-ray fluoroscopy is being performed on the subject 91 on the top 81 of the examination table. At this time, the X-ray irradiation unit 83 supported by the C-arm 84 is disposed above the affected part of the subject 91, and the X-ray detection unit is disposed below the top plate 81. In addition, the X-ray irradiation unit 83 may be disposed below the top plate 81, and the X-ray detection unit may be disposed above the affected part of the subject 91. During X-ray fluoroscopy, the doctor 92 is positioned on one side of the subject 91, and the assistant 93 is positioned on the other side of the subject. Further, peripheral devices 85 such as a monitor and a medical device are disposed on the head side of the subject 91. A support portion 82 for movably supporting the top plate 81 is disposed below the top plate 81 on the foot side of the subject 91.

When a surgical procedure or the like is performed on the subject 91 in such a state, the X-ray irradiation unit 83 may need to be retracted from the imaging position above the subject 91. In such a case, generally, the X-ray irradiation unit 83 is retracted from the imaging position above the subject 91 by rotating the C-arm 84. At this time, as shown in fig. 9 and 10, the support portion 82 is disposed below the top plate 81 on the foot side of the subject 91. Therefore, the rotation direction of the C-arm 84 is clockwise as shown by an arrow a in fig. 10.

When the X-ray irradiation unit 83 is retracted from the imaging position above the subject 91 by rotating the C-arm 84 in the clockwise direction in this manner, the doctor 92 positioned on the side of the subject 91 needs to retract from the rotating region of the C-arm 84 once and then return to the side of the subject 91. Further, the peripheral device 85 disposed on the head side of the subject 91 needs to be moved laterally as indicated by an arrow B in fig. 10. Therefore, complicated operations and time are required to retract the X-ray irradiation unit 83 from the imaging position above the subject 91.

As described in patent document 2, when a structure is adopted in which the C-arm is moved in two directions orthogonal to each other along a rail disposed at the ceiling of the examination room, such a problem can be solved. However, in the case of such a structure, it is necessary to increase the load bearing capacity of the ceiling portion in addition to providing the rail on the ceiling portion of the inspection room, and a large-scale work is required. In addition, in order to facilitate the work, it is also conceivable to arrange rails on the floor of the examination room instead of arranging rails on the ceiling of the examination room.

The present invention has been made to solve the above-described problems, and an object thereof is to provide a radiographic imaging apparatus having a simple structure and capable of easily moving a radiation irradiation unit and a radiation detection unit between an imaging position at which radiography is performed and a retracted position retracted from the imaging position.

Means for solving the problems

One aspect of the present invention is a radiographic imaging apparatus including a base, a radiation irradiation unit, a radiation detection unit, an arm that supports the radiation irradiation unit and the radiation detection unit in a state in which they face each other, and an arm moving mechanism that moves the arm, wherein the arm moving mechanism includes: a first rotating member provided on the base and rotatable about a first rotation axis perpendicular to the base; a second rotating member provided on the first rotating member and rotatable about a second rotation axis perpendicular to the base; a third rotating member provided on the second rotating member, rotatable about a third rotation axis perpendicular to the base, and supporting the arm; and a rotating member rotating mechanism that rotates the first rotating member, the second rotating member, and the third rotating member, and the radiographic imaging apparatus controls the rotating member rotating mechanism to linearly move the radiation irradiation section and the radiation detection section between an imaging position at which radiographic imaging is performed and a retracted position retracted from the imaging position.

ADVANTAGEOUS EFFECTS OF INVENTION

According to the radiographic imaging apparatus of the above aspect, a simple configuration can be realized, and the radiation irradiation section and the radiation detection section can be linearly moved between the imaging position at which radiographic imaging is performed and the retracted position retracted from the imaging position.

Drawings

Fig. 1 is a perspective view of an X-ray imaging apparatus 100 as a radiographic imaging apparatus according to an embodiment of the present invention.

Fig. 2A is a schematic side view of the X-ray imaging apparatus 100.

Fig. 2B is a schematic side view of the X-ray imaging apparatus 100.

Fig. 3 is a perspective view of the examination table 41.

Fig. 4 is a block diagram showing a main control system for moving the C-arm 21 and the top plate 42.

Fig. 5 is an explanatory diagram schematically showing a state in which the X-ray irradiation unit 11 and the X-ray detection unit 14 are moved between the imaging position and the retracted position.

Fig. 6 is an explanatory diagram schematically showing a state in which the X-ray irradiation unit 11 and the X-ray detection unit 14 are moved between the imaging position and the retracted position.

Fig. 7 is an explanatory diagram schematically showing a state in which the X-ray irradiation unit 11 and the X-ray detection unit 14 are moved between the imaging position and the retracted position.

Fig. 8 is an explanatory diagram schematically showing a state in which the X-ray irradiation unit 11 and the X-ray detection unit 14 are moved between the imaging position and the retracted position.

Fig. 9 is an explanatory diagram showing a retracting operation of retracting the X-ray irradiation unit and the X-ray detection unit from the imaging position by rotating the C-arm 84.

Fig. 10 is an explanatory diagram showing a retracting operation of rotating the C-arm 84 to retract the X-ray irradiation unit and the X-ray detection unit from the imaging position.

Description of the reference numerals

11: an X-ray irradiation unit; 12: a collimator; 13: an X-ray tube; 14: an X-ray detection unit; 21: a C-shaped arm; 24: a C-arm support frame; 25: a second rotating member; 26: a first rotating member; 27: a base station; 31: a first rotating shaft; 32: a second rotation shaft; 33: a third rotation axis; 34: a fourth rotation axis; 41: a consulting table; 42: a top plate; 44: a support table; 50: a control unit; 51: a first motor; 52: a second motor; 53: a third motor; 54: a fourth motor; 55: an operation unit.

Detailed Description

Embodiments of the present invention will be described below with reference to the drawings. Fig. 1 is a perspective view of an X-ray imaging apparatus 100 as a radiographic imaging apparatus according to the present embodiment. Fig. 2A and 2B are schematic side views showing the configuration of the X-ray imaging apparatus 100.

The X-ray imaging apparatus 100 includes: an X-ray irradiation unit 11 including an X-ray tube 13 and a collimator 12; an X-ray detection unit 14 including a flat panel detector; a C-arm 21 that supports the X-ray irradiation unit 11 and the X-ray detection unit 14 in a state facing each other; and an arm moving mechanism 200 that moves the C-shaped arm 21. The C-arm 21 includes an arm main body 22 and a sliding support portion 23 that slidably supports the arm main body 22.

The X-ray imaging apparatus 100 further includes: a base table 27; a first rotating member 26 provided on the base 27 and rotatable about a first rotating shaft 31 perpendicular to the base 27; a second rotating member 25 provided on the first rotating member 26 and rotatable about a second rotating shaft 32 perpendicular to the base 27; and a C-arm support 24 provided on the second pivot member 25 and pivotable about a third pivot shaft 33 perpendicular to the base 27. The slide support portion 23 is supported by the C-arm support frame 24 so as to be rotatable about a rotation axis parallel to the base 27. The C-arm support 24 functions as a third rotating member according to the present invention.

The base 27 is fixed to a floor in a room where the X-ray imaging apparatus 100 is installed. When the floor surface is horizontal, the first rotation shaft 31, the third rotation shaft 32, and the third rotation shaft 33 are all oriented in the vertical direction, and the rotation shaft of the slide support portion 23 is oriented in the horizontal direction.

The first rotating member 26, the second rotating member 25, the C-arm support 24, and the C-arm 21 coupled to each other constitute a three-axis link mechanism as links, respectively. Relative positions of the X-ray irradiation unit 11 and the X-ray detection unit 14 with respect to the base 27 are determined based on the relative positional relationship between the first rotation axis 31 and the third rotation axis 33, for example, as shown in fig. 2A and 2B. The lengths of the first rotating member 26, the second rotating member 25, the C-arm support 24, and the C-arm 21 are set to have a predetermined relationship with each other, and as a result, the X-ray irradiation unit 11 and the X-ray detection unit 14 can be linearly moved between an imaging position at which X-ray imaging is performed and a retracted position retracted from the imaging position by a triaxial link mechanism, as will be described later.

Fig. 3 is a perspective view of the examination table 41 constituting the X-ray imaging apparatus 100.

The examination table 41 includes: a base 43 fixed to the floor in the room; a support base 44 provided on the base 43 and rotatable about a fourth rotation axis 34 perpendicular to the base 43; and a top plate 42 that is movable in the direction of the arrow shown in fig. 3 with respect to the support base 44. The top plate 42 functions as a subject placement portion for placing a subject thereon. The top plate 42 is formed of an elongated plate-like member, and one end portion is narrower in width than the other portion. The head of the subject is placed on the narrow portion. The top plate 42 rotates about the fourth rotation shaft 34 together with the support base 44. When the floor surface in the room is horizontal, the fourth rotation axis 34 faces the vertical direction. In addition, the top plate 42 moves in the horizontal direction.

Fig. 4 is a block diagram showing a main control system for moving the C-arm 21 and the top plate 42.

The X-ray imaging apparatus 100 includes a control unit 50 that controls the entire apparatus. The X-ray imaging apparatus 100 further includes: a first motor 51 for rotating the first rotating member 26 about the first rotating shaft 31; a second motor 52 for rotating the second rotating member 25 about the second rotating shaft 32; a third motor 53 for rotating the C-arm support frame 24 and the C-arm 21 about the third rotation shaft 33; and a fourth motor 54 for rotating the top plate 42 together with the support base 44 about the fourth rotation shaft 34. The first motor 51, the second motor 52, and the third motor 53 correspond to a turning member turning mechanism of the present invention, and the fourth motor 54 corresponds to a placing portion turning mechanism of the present invention. The control unit 50 is connected to a first motor 51, a second motor 52, a third motor 53, and a fourth motor 54.

The control unit 50 is connected to an operation unit 55 having a mouse and a keyboard, and a display unit 56 including a liquid crystal display panel and the like. When the X-ray irradiation unit 11 and the X-ray detection unit 14 are moved via the first rotating member 26, the second rotating member 25, the C-arm support 24, and the C-arm 21 coupled to each other as described later, the operation unit 55 functions as an input unit for inputting a destination of the movement. When the top plate 42 of the examination table 41 is moved, the operation unit 55 functions as an input unit for inputting the amount of movement.

The control unit 50 uses a computer such as a CPU as a hardware resource, and realizes its function in accordance with software loaded in the computer.

Next, an operation of moving the X-ray irradiation unit 11 and the X-ray detection unit 14 between the imaging position and the retracted position in the X-ray imaging apparatus 100 will be described with reference to fig. 5 to 8.

Fig. 5 and 6 are schematic diagrams for explaining an operation of moving the X-ray irradiation unit 11 and the X-ray detection unit 14 from the head side of the subject to the imaging position and the retracted position. When the X-ray irradiation unit 11 and the X-ray detection unit 14 are moved from the head side of the subject, the first rotating member 26, the second rotating member 25, the C-arm support 24, and the C-arm 21 constituting the three-axis link mechanism are disposed on the same straight line in the longitudinal direction of the top plate 42 of the examination table 41 (the body axis direction of the subject placed on the top plate) as shown in fig. 5. At this time, the first rotating member 26, the second rotating member 25, the C-arm support 24, and the C-arm 21 cross the center of the top plate 42 in the short-side direction, and thereby the X-ray irradiation unit 11 and the X-ray detection unit 14 are disposed at opposite imaging positions with the affected part of the subject interposed therebetween.

Fig. 5 shows a state in which the third rotation shaft 33 is positioned closer to the top plate 42 than the second rotation shaft 32 (see fig. 2B). When the affected area (imaging position) of the subject is located on the foot side or the head side of the subject than the position shown in fig. 5, the angles of the first rotating member 26 and the second rotating member 25 with respect to the C-arm support 24 and the C-arm 21 may be changed while maintaining the directions of the C-arm support 24 and the C-arm 21. The second rotation shaft 32 may be disposed on the top plate 42 side of the third rotation shaft 33 (see fig. 2A). Further, the top plate 42 of the examination table 41 can be moved in the body axis direction of the subject.

On the other hand, when the X-ray irradiation unit 11 and the X-ray detection unit 14 disposed at the imaging position shown in fig. 5 are moved to the retracted position, the first rotating member 26 is rotated clockwise about the first rotating shaft 31. Further, the second rotating member 25 is rotated clockwise about the second rotating shaft 32, and the C-arm support 24 and the C-arm 21 are rotated counterclockwise about the third rotating shaft 33.

As a result, as shown in fig. 6, the X-ray irradiation unit 11 and the X-ray detection unit 14 move to the retracted positions retracted further toward the head of the subject than the imaging positions shown in fig. 5. At this time, the control unit 50 controls the rotation amount and the rotation speed of each of the first motor 51, the second motor 52, and the third motor 53, thereby linearly moving the X-ray irradiation unit 11 and the X-ray detection unit 14 from the imaging position to the retracted position. That is, in this example, the control unit 50 functions as a rotation control unit. Therefore, when the X-ray irradiation unit 11 and the X-ray detection unit 14 are disposed at the opposed imaging positions with the affected part of the subject interposed therebetween and the X-ray imaging is performed, even when the X-ray irradiation unit 11 and the X-ray detection unit 14 are temporarily retracted from the imaging positions in order to perform a surgical procedure or the like on the subject, the retraction operation of the doctor 92 and the movement operation of the peripheral device 85 are not required.

When the X-ray irradiation unit 11 and the X-ray detection unit 14 are returned from the retracted positions to the imaging positions, the first rotating member 26 is rotated counterclockwise about the first rotating shaft 31, and the second rotating member 25 is rotated counterclockwise about the second rotating shaft 32. Further, the C-arm support 24 and the C-arm 21 are rotated clockwise about the third rotation shaft 33. This enables the X-ray irradiation unit 11 and the X-ray detection unit 14 to be linearly moved from the retracted positions shown in fig. 6 to the imaging positions shown in fig. 5.

Next, an operation of moving the X-ray irradiation unit 11 and the X-ray detection unit 14 from the side of the subject between the imaging position and the retracted position will be described. In this case, as shown in fig. 7, the first rotating member 26, the second rotating member 25, the C-arm support 24, and the C-arm 21, which are coupled to each other, constituting the three-axis link mechanism are rotated about the first rotation shaft 31, the second rotation shaft 32, and the third rotation shaft 33, respectively. The top plate 42 of the examination table 41 is rotated together with the support table 44 about the fourth rotation axis 34 from a position indicated by a virtual line to a position indicated by a solid line in fig. 7. Thus, the X-ray irradiation unit 11 and the X-ray detection unit 14 are disposed at the opposite imaging positions with the affected part of the subject interposed therebetween, and the C-arm support 24 and the C-arm 21 are oriented in the short side direction of the top plate 42 (the direction perpendicular to the body axis of the subject).

When the X-ray irradiation unit 11 and the X-ray detection unit 14 at the imaging positions shown in fig. 7 are temporarily retracted from the imaging positions, the first rotating member 26 is rotated counterclockwise about the first rotating shaft 31, and the second rotating member 25 is rotated counterclockwise about the second rotating shaft 32. Further, the C-arm support 24 and the C-arm 21 are rotated clockwise about the third rotation shaft 33.

Thereby, as shown in fig. 8, the X-ray irradiation unit 11 and the X-ray detection unit 14 at the imaging position can be moved to the retracted position retracted to the side of the top plate 42. At this time, the control unit 50 controls the rotation amount and the rotation speed of each of the first motor 51, the second motor 52, and the third motor 53, thereby linearly moving the X-ray irradiation unit 11 and the X-ray detection unit 14 from the imaging position to the retracted position. That is, in this example, the control unit 50 functions as a second rotation control unit. In this case, the retracting operation of the doctor 92 and the moving operation of the peripheral device 85 are also not required.

When the X-ray irradiation unit 11 and the X-ray detection unit 14 are returned from the retracted positions to the imaging positions, the first rotating member 26 is rotated clockwise about the first rotating shaft 31, the second rotating member 25 is rotated clockwise about the second rotating shaft 32, and the C-arm support 24 and the C-arm 21 are rotated counterclockwise about the third rotating shaft 33. This enables the X-ray irradiation unit 11 and the X-ray detection unit 14 to be linearly moved from the retracted positions shown in fig. 8 to the imaging positions shown in fig. 7.

As described above, according to the X-ray imaging apparatus 100 of the present embodiment, the first rotating member 26, the second rotating member 25, the C-arm support 24, and the C-arm 21, which have the predetermined relationship in their respective lengths, constitute the three-axis link mechanism, and the first rotating member 26, the second rotating member 25, the C-arm support 24, and the C-arm 21 are rotated at the predetermined speed, respectively, so that the X-ray irradiation unit 11 and the X-ray detection unit 14 can be linearly moved between the imaging position and the retracted position retracted from the imaging position.

It should be understood by those skilled in the art that the above-described exemplary embodiments are specific examples in the following ways.

(first item)

A radiographic apparatus according to an aspect of the present invention includes a base, a radiation irradiation unit, a radiation detection unit, an arm that supports the radiation irradiation unit and the radiation detection unit in a state in which they face each other, and an arm moving mechanism that moves the arm, wherein the arm moving mechanism includes: a first rotating member provided on the base and rotatable about a first rotation axis perpendicular to the base; a second rotating member provided on the first rotating member and rotatable about a second rotation axis perpendicular to the base; and a third rotating member provided on the second rotating member, capable of rotating around a third rotation axis perpendicular to the base, and supporting the arm,

the radiographic imaging apparatus further includes a rotation control unit that controls the rotation member rotation mechanism so that the radiation irradiation unit and the radiation detection unit move linearly between an imaging position at which radiographic imaging is performed and a retracted position retracted from the imaging position.

According to the radiographic imaging apparatus described in the first aspect, the radiation irradiation section and the radiation detection section can be linearly moved between the imaging position at which radiography is performed and the retracted position while achieving a simple configuration.

(item II)

The radiographic imaging apparatus according to the first aspect may further include:

a examination table having a subject placement portion on which a subject is placed and a placement portion rotating mechanism that rotates the subject placement portion around a fourth rotation axis perpendicular to the base; and

a second rotation control section that controls the rotating member rotating mechanism and the placing section rotating mechanism so that the radiation irradiation section and the radiation detection section move between the imaging position and the retracted position along a body axis of a subject placed on the subject placing section.

According to the radiographic imaging apparatus described in the second aspect, the radiation irradiation section and the radiation detection section can be linearly moved along the body axis of the subject placed on the subject placement section by moving the arm by the rotating member rotating mechanism and rotating the subject placement section by the placement section rotating mechanism.

(third item)

The radiographic imaging apparatus according to the first aspect may further include:

a examination table having a subject placement portion on which a subject is placed and a placement portion rotating mechanism that rotates the subject placement portion around a fourth rotation axis perpendicular to the base; and

a second rotation control section that controls the rotating member rotating mechanism and the placing section rotating mechanism so as to move the radiation irradiation section and the radiation detection section between the imaging position and the retracted position in a direction intersecting a body axis of a subject placed on the subject placing section.

According to the radiographic imaging apparatus of the third aspect, the radiation irradiation section and the radiation detection section can be linearly moved in the direction intersecting the body axis of the subject placed on the subject placement section by moving the arm by the rotating member rotating mechanism and rotating the subject placement section by the placement section rotating mechanism.

(fourth item)

The radiographic imaging apparatus according to the first or second aspect, wherein the base is fixed to a horizontal surface.

According to the radiographic imaging apparatus of the fourth aspect, the radiation irradiation section and the radiation detection section can be linearly moved between the imaging position at which the radiographic imaging is performed and the retracted position retracted from the imaging position by the simple structure in which the base is fixed to the horizontal plane such that the first to third rotation axes are all oriented in the vertical direction.

The above description is provided for the purpose of illustrating embodiments of the present invention, and is not intended to limit the present invention.