WO2015037179A1

WO2015037179A1 - Radiation-generating device and radiography system

Info

Publication number: WO2015037179A1
Application number: PCT/JP2014/004061
Authority: WO
Inventors: 七平櫻木
Original assignee: キヤノン株式会社
Priority date: 2013-09-13
Filing date: 2014-08-04
Publication date: 2015-03-19
Also published as: JP2015077390A; JP6363860B2

Abstract

A radiation-generating device provided with a radiation-generating unit for emitting radiation toward an object to be examined, an arm section for supporting the radiation-generating unit, and a post for supporting the arm section. The arm section comprises a first arm and a second arm. The post and the first arm are rotatably connected via a first movable joint and the first arm and the second arm are rotatably connected via a second movable joint. The radiation-generating device is provided with a limiting mechanism for limiting the rotation of the second arm at the second movable joint according to the rotation of the first arm at the first movable joint.

Description

Radiation generation apparatus and radiation imaging system

The present invention relates to a radiation generating apparatus and a radiation imaging system.

Currently, as a radiographic apparatus for medical use, there is an increasing demand for a portable radiographic apparatus that is excellent in portability and can be taken out of hospital facilities.

In the conventional portable radiographic apparatus, the support for supporting the radiation generating unit and the radiation generating unit is integral or separate, and it is desired to be lightweight in order to improve portability. The support has a simple arm shape. Since the arm does not have an adjustment mechanism or joint for adjusting the position of the radiation generator, a radiation detector installed on the back of the support or subject or the subject depending on the position of the subject and the imaging region Adjustment work to move and align the position of the radiation generator also occurs.

Patent Document 1 discloses a structure in which a radiation generating unit can be moved by providing a rail on a four-legged support that is assembled in consideration of portability. Patent Document 2 discloses a structure that facilitates the weight reduction of the apparatus and the movement of the radiation generating unit by attaching an extendable arm that holds the radiation generating unit to a support column rising from the radiation detector. Patent Document 3 proposes an arm that is not a portable radiography apparatus, but that can freely adjust the position of a radiation generation unit in a radiography round-trip car.

JP 2012-65769 A JP 2012-70835 A JP 2002-159479 A

However, in the structure of Patent Document 1, it is easy to move the radiation generating unit in the direction along the rail, but the radiation generating unit cannot be moved in the direction perpendicular to the rail. When moving the position of the radiation generating unit in a direction perpendicular to the rail, it becomes a factor that places a burden on the operator.

Further, in Patent Document 2, as in Patent Document 1, the movement of the radiation generating unit is limited to the direction along the arm. Furthermore, since the radiographic round-trip wheel as described in Patent Document 3 is too heavy, it is difficult to take it out to a disaster or home medical care site.

In view of the above problems, an object of the present invention is to provide a radiation generating apparatus and a radiation imaging system that improve the operability of an operator.

The radiation generating apparatus according to the present invention that achieves the above object is as follows.
A radiation generating apparatus comprising a radiation generating unit that irradiates a subject with radiation, an arm unit that supports the radiation generating unit, and a support column that supports the arm unit,
The arm portion has a first arm and a second arm,
The support column and the first arm are rotatably connected to each other via a first movable joint, and the first arm and the second arm are rotatably connected to each other via a second movable joint,
A limiting mechanism is provided for limiting the rotation of the second arm in the second movable joint in accordance with the rotation of the first arm in the first movable joint.

According to the present invention, it is possible to provide a radiation generating apparatus and a radiation imaging system with improved operator operability.

Other features and advantages of the present invention will become apparent from the following description with reference to the accompanying drawings. In the accompanying drawings, the same or similar components are denoted by the same reference numerals.

The accompanying drawings are included in the specification, constitute a part thereof, show an embodiment of the present invention, and are used to explain the principle of the present invention together with the description.
1 is a configuration diagram of a portable radiation generating apparatus according to a first embodiment. , Explanatory drawing of the limiting mechanism inside the arm which concerns on 1st Embodiment. , Explanatory drawing of the movement range of the radiation generation part which concerns on 1st Embodiment. , Explanatory drawing of the apparatus for portable radiation generation which concerns on 2nd Embodiment. , Explanatory drawing of a mode that the support | pillar of the portable radiation generation apparatus which concerns on 2nd Embodiment moves with respect to a support leg. Explanatory drawing of the apparatus for portable radiation generation which concerns on 3rd Embodiment. , Structural explanatory drawing inside the arm which concerns on 4th Embodiment. Explanatory drawing of rotation of the arm which concerns on 5th Embodiment. Explanatory drawing of rotation of the arm which concerns on 5th Embodiment. , Explanatory drawing of the movement range of the radiation generation part which concerns on 5th Embodiment.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. Throughout the embodiments, the same components are denoted by the same reference numerals.

(First embodiment)
With reference to FIG. 1 thru | or FIG. 3A and FIG. 3B, the structure of the portable radiation generating apparatus which concerns on 1st Embodiment of this invention is demonstrated. FIG. 1 shows a configuration example of a portable radiation generating apparatus that images a subject lying on a bedding. 2A and 2B show an example of a limiting mechanism that limits the rotation of the joint inside the arm. 2A is a top view inside the arm of the portable radiation generating apparatus in FIG. 1, and FIG. 2B is a side view inside the arm. 3A and 3B show the movable range in the position adjustment of the radiation generating unit before imaging.

In FIG. 1, reference numeral 1 denotes a radiation generating unit that generates radiation. Reference numeral 2 denotes a holding mechanism unit that holds the radiation generating unit during transportation or imaging, and has a folding mechanism unit to ensure portability. Although the holding mechanism unit 2 is connected to the radiation generating unit 1, it may have a removable structure in consideration of assembly maintenance. Reference numeral 3 denotes a support column as a constituent element of the holding mechanism unit 2, which supports a load in the vertical direction when the holding mechanism unit 2 is self-supporting.

4 is one of the components of the holding mechanism section 2, one end of which is connected to the radiation generation section 1, and the other side in the longitudinal direction is an arm section connected to the upper end of the support column 3. The arm portion 4 can be folded toward the support column 3 in order to reduce the size of the entire apparatus and improve portability during transportation and storage.

Numeral 5 is a support leg connected to the lower end of the

column

3, and 6 indicates a subject to be imaged. Directly below the subject 6 is disposed a radiation detector 7 that detects the radiation that has passed through the subject when the radiation generator 1 irradiates the subject 6 with radiation and converts it into an image. Since the distance between the radiation generator 1 and the radiation detector 7 is constant when the arm 4 is deployed, the subject 6 is placed immediately below the radiation generator 1 with the arm 4 deployed. Does not require distance adjustment. A radiation imaging system may be configured including the radiation generating apparatus and the radiation detector 7.

As shown in FIG. 1, FIG. 2A and FIG. 2B, the arm unit 4 includes at least two arms, a split arm 41 (first arm) and a split arm 42 (second arm). The split arm 41 is connected to the support column 3 via a movable joint 8 (first movable joint), and the split arm 42 is connected to the split arm 41 via a movable joint 9 (second movable joint). . Since the arm unit 4 has two or more joints, the radiation generating unit 1 can be freely moved within the imaging range.

However, when each arm can freely rotate about each movable joint, the radiation generating unit 1 may be moved out of the imaging range, and the radiation generating unit is moved to a position where the balance of the center of gravity is lost. 1 moves. When the balance of the center of gravity is lost, the device is tilted, so that it is difficult to maintain conditions for acquiring a good image. Therefore, a limiting mechanism for limiting the movable range of the radiation generating unit 1 is provided. The restriction mechanism restricts the rotation of the split arm 42 (second arm) in the movable joint 9 (second movable joint) so that the center of gravity balance of the radiation generating apparatus is maintained.

The movable joint 8 includes a joint shaft 81 installed on the upper portion of the support column 3 and a bearing 82 in the split arm 41, and when the bearing 82 is fitted to the joint shaft 81 and rotated, the split arm 41 is moved to the support column 3. It rotates around the center of the axis. A fixed gear 83 is connected on the same axis as the joint shaft 81, and the split arm 41 rotates about the center of the support column 3, so that the rotating gear 84 meshed with the fixed gear 83 becomes a circle of the fixed gear 83. Rotate along the circumference.

A rotating gear 85 is installed on the split arm 41 so as to mesh with the rotating gear 84, and a timing pulley 86 is coaxially connected to the rotating gear 85. A timing belt 10 as a transmission mechanism is wound around the timing pulley 86, and the timing belt 10 is also wound around a timing pulley 92 connected to the joint shaft 91 of the movable joint 9. The joint shaft 91 rotates in conjunction with it. The timing belt 10 is not limited to the timing belt, and a transmission mechanism using a gear, a chain, a wire, or the like may be used. That is, the radiation generating apparatus includes a transmission mechanism that transmits the rotation of the movable joint 8 (first movable joint) to the rotation of the movable joint 9 (second movable joint).

The split arm 42 is connected to the joint shaft 91 and is rotatable about the joint shaft 91. Here, the joint shaft 91 has joint

rotation stopping members

93A and 93B (first member and second member), and the split arm 42 has an arm rotation stopping member 94 (third member). is doing. When the split arm 42 rotates about the joint shaft 91 and the arm rotation stop member 94 comes into contact with the joint rotation stop member 93, the rotation of the arm stops. Therefore, the split arm 42 has a structure that can rotate only within a range defined by the two joint

rotation stopping members

93A and 93B.

As a result, the arm rotation stopping member 94 (third member) contacts the joint rotation stopping member 93A (first member), and the arm rotation stopping member 94 (third member) rotates the joint. A limiting mechanism that limits the split arm 42 to be rotatable with respect to the split arm 41 is configured between the stop member 93B (second member) and a position in contact with the stop member 93B (second member).

That is, the radiation generating apparatus includes joint

rotation stopping members

93A and 93B (first member and second member) provided on the movable joint 9 (second movable joint), and the split arm 42 (second member). An arm rotation stopping member 94 (third member) provided on the arm), and the limiting mechanism includes an arm rotation stopping member 94 (third member) and a joint rotation stopping member 93A (first member). ) And the position where the arm rotation stop member 94 (third member) contacts the joint rotation stop member 93B (second member), the split arm 42 (second arm). Is limited to be rotatable with respect to the split arm 41 (first arm).

In addition, the restriction mechanism includes joint

rotation stopping members

93A and 93B (the first member and the second member) according to the rotation of the split arm 41 (first arm) at the movable joint 8 (first movable joint). By controlling the position of the member, the rotation of the split arm 42 (second arm) at the movable joint 9 (second movable joint) is limited.

That is, since the positions of the joint

rotation stop members

93A and 93B provided on the joint shaft 91 move in conjunction with the rotation of the split arm 41, the movable range of the split arm 42 changes according to the rotation of the split arm 41. To do. With this structure, as shown in FIGS. 3A and 3B, the movable range of another arm changes so that the balance of the center of gravity does not collapse according to the rotation angle of one arm. For this reason, the operator does not need to consider the balance of the center of gravity, and it is possible to quickly position the radiation generating unit 1 without impairing the operability.

As explained above. According to the radiation generating apparatus according to the present embodiment, the radiation including the radiation generating unit 1 that generates radiation to the subject, the arm unit 4 that supports the radiation generating unit 1, and the support column 3 that supports the arm unit 4. In the generating device, the arm section 4 includes a split arm 41 (first arm) and a split arm 42 (second arm), and the support column 3 and the split arm 41 (first arm) are movable. The split arm 41 (first arm) and the split arm 42 (second arm) rotate via the movable joint 9 (second movable joint) via the joint 8 (first movable joint), respectively. A restricting mechanism is provided that is connected so as to limit the rotation of the split arm 42 (second arm) in accordance with the rotation of the split arm 41 (first arm).

Thus, by adopting a small shape, installation and positioning can be completed simply by placing it on a bed regardless of places such as home medical care and disaster sites. Further, the radiation generating unit can be freely moved within a range in which the balance of the center of gravity is not lost by the limiting mechanism that limits the movable range of the arm, and operability that can be easily positioned can be ensured. Therefore, it becomes possible to improve the operability of the operator.

(Second Embodiment)
In the second embodiment, an example in which the position of the column is moved on the support leg in addition to the configuration of the first embodiment will be described. With reference to FIG. 4A and FIG. 4B and FIG. 5A and FIG. 5B, the structure of the portable radiation generation apparatus which concerns on 2nd Embodiment is demonstrated. FIG. 4A and FIG. 4B show an example of the structure of the column moving mechanism inside the column 3 and the support leg 5. 4A is a cross-sectional view including the inside of the split arm 41, and FIG. 4B is a cross-sectional view when FIG. 4A is observed from the right side of the drawing. FIG. 5A and FIG. 5B are explanatory diagrams showing how the support column 3 moves with respect to the support leg 5.

4A and 4B, a cylindrical transmission shaft 11 is provided coaxially with the joint shaft 81, and rotates in conjunction with the bearing 82 of the split arm 41. A lower portion of the transmission shaft 11 is connected to a support leg 5 having a nested structure by a bevel gear mechanism 111 and a rack gear 112. When the split arm 41 is rotated, the rack gear 112 pushes and pulls the support leg 5 having the nested structure in conjunction with the rotation of the split arm 41, so that the position of the column 3 moves with respect to the support leg 5. With this structure, as shown in FIGS. 5A and 5B, it is possible to keep the movable range within the range of the center of gravity balance while ensuring the degree of freedom of the movable range of the radiation generating unit 1.

The structure that links the rotation of the split arm 41 with the expansion and contraction motion of the support leg 5 is not limited to the bevel gear and the rack gear, and a transmission mechanism using a timing belt, a chain, a wire, or the like may be used. .

As explained above. In the radiation generating apparatus according to the present embodiment, the support leg 5 that supports the support column 3 and the support column 3 according to the rotation of the split arm 41 (first arm) at the movable joint 8 (first movable joint). And a moving mechanism for moving the As a result, it is possible to keep the movable range within the range of balance of the center of gravity while ensuring the degree of freedom of the movable range of the radiation generating unit.

(Third embodiment)
In the third embodiment, an example in which a brake mechanism is added to the configuration described in the first embodiment will be described. With reference to FIG. 6, the structure of the portable radiation generating apparatus according to the third embodiment will be described. FIG. 6 is a view particularly showing the structure of the joint inside the arm.

As shown in FIG. 6, a brake mechanism that generates a drag force against the movable joint 8 and the movable joint 9 of the portable radiation generating device so as not to rotate with a force less than a predetermined external force by a frictional force such as a torque hinge. 12A and a brake mechanism 12B are provided. Since the split arm 41 and the split arm 42 cannot be moved by the brake mechanism 12A and the brake mechanism 12B unless an external force exceeding a certain level is applied, the split arm 41 and the split arm 42 are rotated by an external force not intended by the operator. Can be prevented.

可 Portable radiation generators are often used on uneven terrain such as disaster sites and home medical sites for patients with uncertain consciousness. For this reason, the arm of the portable radiation generating device may rotate to an angle not intended by the operator due to the inclination of the rough terrain or the operation not intended by the patient. By providing the

brake mechanisms

12A and 12B according to the present embodiment, it is possible to prevent such a malfunction.

As explained above. The radiation generating apparatus according to the present embodiment generates a drag so that the movable joint 8 (first movable joint) or the movable joint 9 (second movable joint) does not rotate with a force less than a predetermined external force. A mechanism is further provided. Thereby, it can prevent that the division | segmentation arm 41 and the division | segmentation arm 42 will rotate by the external force which an operator does not intend.

(Fourth embodiment)
In the fourth embodiment, an example will be described in which a position adjusting mechanism for the radiation diaphragm is added to the configuration described in the first embodiment. 7A and 7B are views showing the structure of the position adjusting mechanism of the radiation stop portion inside the arm. FIG. 7A is a top view of the apparatus, and FIG. 7B is a side view.

As shown in FIGS. 7A and 7B, a radiation diaphragm 13 is attached to the radiation generating unit 1 that generates radiation in order to generate radiation appropriate only for the imaging range of the subject 6. The radiation field of the radiation irradiated from the radiation generating unit 1 can be controlled by the radiation restricting unit 13. A timing belt 132 is wound around the joint shaft 91, and the timing belt 132 is also wound around the radiation aperture rotation shaft 131. For this reason, by rotating the split arm 41, the joint shaft 91 rotates in conjunction with the rotation of the timing pulley 86, and further, the radiation diaphragm 13 rotates in conjunction with the joint shaft 91. That is, according to the rotation of the split arm 42 (second arm) at the movable joint 9 (second movable joint), the radiation diaphragm 13 rotates so as to maintain a certain direction with respect to the subject 6. To do.

With this structure, the imaging axis of the radiation diaphragm 13 can indicate the same direction as the axial direction of the subject 6 to be imaged regardless of the angle at which the arm unit 4 rotates. The timing belt 132 is not limited to the timing belt, and a transmission mechanism using gears, chains, wires, or the like may be used.

As described above, the radiation generating apparatus according to the present embodiment further includes the radiation restricting unit 13 that controls the radiation field irradiated from the radiation generating unit 1, and the movable joint 9 (second movable joint). The radiation diaphragm 13 rotates according to the rotation of the split arm 42 (second arm). As a result, the radiation diaphragm 13 can maintain a fixed orientation with respect to the subject 6, and the labor of adjustment by the operator can be reduced.

(Fifth embodiment)
In 1st Embodiment, the example which restrict | limits rotation of the division | segmentation arm 42 (2nd arm) in the movable joint 9 (2nd movable joint) was demonstrated. On the other hand, in the fifth embodiment, the limiting mechanism rotates the split arm 41 (first arm) in the movable joint 8 (first movable joint) so that the center of gravity balance of the radiation generating apparatus is maintained. An example of limiting the above will be described. In addition, the same code | symbol is attached | subjected about the structure same as the already mentioned reference code | symbol.

As already described with reference to FIGS. 2A and 2B, also in this embodiment, the split arm 42 is connected to the joint shaft 91 installed on the split arm 41, and can be rotated about the joint shaft 91. is there. Here, the joint shaft 91 has joint

rotation stopping members

93A and 93B.

As a result, the arm rotation stop member 94 (third member) is in a position between two positions of the joint rotation stop member 93A (first member) and the joint rotation stop member 93B (second member). The limiting mechanism is configured to limit the split arm 42 so that the split arm 42 can rotate with respect to the split arm 41.

That is, the radiation generating apparatus includes joint

rotation stopping members

93A and 93B (first member and second member) provided on the movable joint 9 (second movable joint), and the split arm 42 (second member). Arm rotation stop member 94 (third member) provided on the arm). The restriction mechanism includes a position where the arm rotation stopping member 94 (third member) contacts the joint rotation stopping member 93A (first member), and the arm rotation stopping member 94 (third member). It moves only between the rotation stop member 93B (second member) and a position in contact with it. Accordingly, the split arm 42 (second arm) is restricted so as to be rotatable with respect to the split arm 41 (first arm).

On the other hand, the movable joint 8 includes a joint shaft 81 installed in the upper part of the support column 3 and a bearing 82 in the split arm 41, and the split arm 41 is rotated by fitting the bearing 82 to the joint shaft 81. Rotates around the center of the column 3. A fixed gear 83 is connected on the same axis as the joint shaft 81, and the split arm 41 rotates about the center of the support column 3, so that the rotating gear 84 meshed with the fixed gear 83 becomes a circle of the fixed gear 83. Rotate along the circumference.

A rotating gear 85 is installed on the split arm 41 so as to mesh with the rotating gear 84, and a timing pulley 86 is coaxially connected to the rotating gear 85. A timing belt 10 as a transmission mechanism is wound around the timing pulley 86, and the timing belt 10 is also wound around a timing pulley 92 connected to the joint shaft 91 of the movable joint 9. The joint shaft 91 rotates in conjunction with it.

That is, since the positions of the joint

rotation stop members

93A and 93B provided on the joint shaft 91 move in conjunction with the rotation of the split arm 41, when the split arm 41 continues to rotate, the joint

rotation stop member

93A or 93B contacts the arm rotation stop member 94. The rotation of the joint shaft 91 stops when the joint

rotation stop member

93A or 93B comes into contact with the arm rotation stop member 94. Since the rotation of the joint shaft 91 and the rotation of the split arm 41 are linked by the timing belt 10, the rotation of the split arm 41 also stops as the rotation of the joint shaft 91 stops. Therefore, the rotation range of the split arm 41 is also limited by the rotation of the split arm 42.

Here, FIG. 8A shows the movable joint 9 (second movable joint) of the divided arm 42 by the rotation of the movable arm 8 (first movable joint) of the divided arm 41 as described in the first embodiment. This shows a case where the rotation range is limited. On the other hand, FIG. 8B shows the fifth embodiment in which the movable arm 8 (first movable joint) of the divided arm 41 is rotated by the rotation of the movable arm 9 (second movable joint) of the divided arm 42. The case where the rotation range is limited is shown.

The total of the rotation angle of the split arm 41 in the movable joint 8 (first movable joint) and the rotation angle of the split arm 42 in the movable joint 9 (second movable joint) is configured within a predetermined range. Also good. The total of the rotation angle of the first movable joint and the rotation angle of the second movable joint may be 90 degrees, for example. In that case, when the first movable joint is rotated by 60 degrees, the second movable joint can be rotated by 30 degrees. Further, when the first movable joint is rotated by 45 degrees, the second movable joint can be rotated by 45 degrees.

9A and 9B, the movable range of each divided arm changes so that the radiation generator 1 can move freely within a predetermined range (for example, within the center of gravity balance range). The operator is not required to consider the balance of the center of gravity when operating the position of the radiation generating unit 1, and can quickly position the radiation generating unit 1 without impairing operability.

As described above, according to the radiation generating apparatus according to the present embodiment, the radiation generating unit 1 that generates radiation on the subject, the arm unit 4 that supports the radiation generating unit 1, and the arm unit 4 are supported. This is a radiation generating apparatus including a support 3. The arm unit 4 includes a split arm 41 (first arm) and a split arm 42 (second arm). The support 3 and the split arm 41 (first arm) are movable via the movable joint 8 (first movable joint), and the split arm 41 (first arm) and the split arm 42 (second arm) are movable. Each is connected via a joint 9 (second movable joint) so as to be rotatable. And the limiting mechanism which restrict | limits rotation of the division | segmentation arm 41 (1st arm) according to rotation of the division | segmentation arm 42 (2nd arm) is provided.

Thus, according to the first embodiment or the fifth embodiment, according to the rotation of one arm of the split arm 42 (second arm) and the split arm 41 (first arm), the other arm The rotation of the arm is limited. That is, a limiting mechanism is provided that limits the rotation of the split arm 41 (first arm) and the split arm 42 (second arm) so that the radiation generating unit is disposed within a predetermined range.

The radiation mechanism can be moved freely within the range where the balance of the center of gravity is not lost by the limiting mechanism that limits the movable range of the arm, and the operability for easy positioning can be ensured. Therefore, it becomes possible to improve the operability of the operator.

(Other embodiments)
The present invention can also be realized by executing the following processing. That is, software (program) that realizes the functions of the above-described embodiments is supplied to a system or apparatus via a network or various storage media, and a computer (or CPU, MPU, or the like) of the system or apparatus reads the program. It is a process to be executed.

The present invention is not limited to the above embodiment, and various changes and modifications can be made without departing from the spirit and scope of the present invention. Therefore, in order to make the scope of the present invention public, the following claims are attached.

This application claims priority on the basis of Japanese Patent Application Japanese Patent Application No. 2013-191032 filed on September 13, 2013 and Japanese Patent Application Japanese Patent Application No. 2014-073729 filed on March 31, 2014, The entire contents of the description are incorporated herein.

Claims

A radiation generation apparatus comprising a radiation generation unit that generates radiation on a subject, an arm unit that supports the radiation generation unit, and a support column that supports the arm unit,
The arm portion has a first arm and a second arm,
The support column and the first arm are rotatably connected to each other via a first movable joint, and the first arm and the second arm are rotatably connected to each other via a second movable joint,
An apparatus for generating radiation, comprising: a limiting mechanism that restricts rotation of the second arm in the second movable joint in response to rotation of the first arm in the first movable joint. .
2. The radiation generation according to claim 1, wherein the restriction mechanism restricts the rotation of the second arm in the second movable joint so that a center-of-gravity balance of the radiation generation apparatus is maintained. Equipment.
A support leg for supporting the support column;
The radiation generation according to claim 1, further comprising: a moving mechanism that moves the column on the support leg in accordance with the rotation of the first arm at the first movable joint. Equipment.
4. The brake mechanism according to claim 1, further comprising a brake mechanism that generates a drag so that the first movable joint or the second movable joint does not rotate with a force less than a predetermined external force. 5. The radiation generating apparatus as described.
A radiation diaphragm for controlling an irradiation field of radiation emitted from the radiation generator;
The radiation generating apparatus according to any one of claims 1 to 4, wherein the radiation restricting portion rotates in accordance with the rotation of the second arm at the second movable joint.
In accordance with the rotation of the second arm at the second movable joint, the radiation diaphragm unit rotates so that the radiation diaphragm unit maintains a fixed orientation with respect to the subject. The apparatus for generating radiation according to claim 5.
The radiation generating apparatus according to any one of claims 1 to 6, wherein the arm portion is foldable toward the support column.
A first member and a second member provided in the second movable joint;
A third member provided on the second arm,
The restriction mechanism is configured such that the second arm is located between the position where the third member contacts the first member and the position where the third member contacts the second member. The apparatus for generating radiation according to any one of claims 1 to 7, wherein the apparatus is limited so as to be rotatable with respect to one arm.
The limiting mechanism controls the position of the first movable joint at the second movable joint by controlling the positions of the first member and the second member according to the rotation of the first arm at the first movable joint. The radiation generating apparatus according to claim 8, wherein rotation of the second arm is limited.
10. The radiation generating apparatus according to claim 1, further comprising a transmission mechanism that transmits the rotation of the first movable joint to the rotation of the second movable joint.
The radiation generating apparatus according to claim 10, wherein the transmission mechanism is a timing belt, a chain, or a wire.
A radiation generator for generating radiation on the subject; an arm for supporting the radiation generator;
A radiation generating device comprising a support for supporting the arm part,
The arm portion has a first arm and a second arm,
The support column and the first arm are rotatably connected to each other via a first movable joint, and the first arm and the second arm are rotatably connected to each other via a second movable joint,
An apparatus for generating radiation, comprising: a limiting mechanism for limiting rotation of the first arm and the second arm so that the radiation generating unit is disposed within a predetermined range.
The radiation generating apparatus according to claim 12, wherein the predetermined range is a center-of-gravity balance range.
A radiation generator for generating radiation on the subject; an arm for supporting the radiation generator;
A radiation generating device comprising a support for supporting the arm part,
The arm portion has a first arm and a second arm,
The support column and the first arm are rotatably connected to each other via a first movable joint, and the first arm and the second arm are rotatably connected to each other via a second movable joint,
A radiation generating apparatus comprising: a limiting mechanism that restricts rotation of the first arm in the first movable joint in response to rotation of the second arm in the second movable joint. .
The radiation generating apparatus according to claim 14, wherein the sum of the rotation angle of the first movable joint and the rotation angle of the second movable joint is within a predetermined range.
The radiation generating apparatus according to claim 15, wherein the total is 90 degrees.
The radiation generating apparatus according to any one of claims 1 to 16,
A radiation imaging system comprising: a radiation detector that detects radiation transmitted through the subject.