JPWO2005065546A1 - X-ray equipment - Google Patents

Abstract

An X-ray tube unit for irradiating X-rays, an X-ray image receiving unit disposed opposite to the X-ray tube unit, an arm mounted with the X-ray tube unit and the X-ray image receiving unit, and the arm An X-ray imaging apparatus comprising: a main body that holds the image; an image processing unit that obtains an X-ray image from an image received by the X-ray image receiving unit; and an imaging apparatus operation unit that operates the entire imaging apparatus; The imaging apparatus operation unit moves the arm so that the subject can be imaged from any of the standing position, the sitting position, and the lying position of the subject.

Description

  The present invention relates to an X-ray imaging apparatus capable of imaging various parts of a subject with a single apparatus.

  In the conventional X-ray imaging apparatus as shown in Patent Document 1, usually, most parts other than the chest are imaged in the prone position or the supine position. This X-ray imaging apparatus is designed so that the distance between the X-ray focal point and the X-ray image receiving surface (hereinafter referred to as SID) is a predetermined value, that is, about 1 m. Further, the X-ray detection unit is designed to be movable on the back side of the top plate so that any part on the top plate can be photographed. Therefore, when the subject is in the prone position or the supine position on the top board, any part of the whole body can be imaged from one direction having the X-ray focus.

By the way, when photographing the chest of the subject, it is usually performed in a standing position. In order to perform this chest imaging, in order to secure an X-ray irradiation field (for example, 40 cm × 40 cm) necessary for putting the entire chest into the field of view, it is necessary to lengthen the SID to about 1.8 m to 2 m. . However, in the X-ray source of the conventional X-ray imaging apparatus, as described above, the SID is fixed to about 1 m in order to facilitate imaging of most parts except the chest, and the SID is 1.8 m to 2 m. It cannot be as long as it is. Therefore, when photographing the chest, the top plate is made vertical, and another ceiling-suspended X-ray source is prepared to realize an SID of about 1.8 m to 2 m.
JP 2002-17712 A

  As described above, when switching from imaging other than the chest to chest imaging or vice versa, the X-ray tube must be switched and changed, and the X-ray detector and the top board must be changed. Such switching and changing the arrangement require a lot of time and effort, and are not suitable for photographing that requires quickness. In addition, the X-ray technician must be skilled in imaging positioning such as operation of the apparatus, imaging technique, and setting of the subject's imaging posture.

  In some cases, a subject who has a symptom that cannot sleep on a supine table is photographed while placed on a wheelchair or stretcher. In such a case, the X-ray detection unit behind the top plate of the conventional X-ray imaging apparatus cannot be used, and another set of imaging apparatuses must be prepared.

  The present invention has been made to remedy such a conventional problem, and an object thereof is to provide an X-ray imaging apparatus capable of imaging the chest and other parts such as extremities with a single imaging apparatus. It is.

  According to the present invention, the X-ray tube unit for irradiating X-rays, the X-ray image receiving unit disposed opposite to the X-ray tube unit, the X-ray tube unit and the X-ray image receiving unit are held, and the X-ray image receiving unit is held. A holding unit capable of changing at least one of the direction and position on the vertical plane of the X-ray center line or the length of the X-ray center line with respect to an X-ray center line connecting the center of the X-ray image receiving unit and the X-ray tube unit And an image processing unit that obtains an X-ray image from an image received by the X-ray image receiving unit.

In addition, the holding unit includes an arm that is movable by mounting the X-ray tube unit and the X-ray image receiving unit, and a main body that holds the arm, on a vertical plane of the X-ray center line And an imaging device operation unit that moves the arm so that the subject can be imaged from any of standing, sitting, and lying positions by changing the direction and position of the subject. To do.
The X-ray tube device and the X-ray image receiving device are provided on both ends of the arm so as to face each other, and an arm rotation driving means for rotating the arm on the side of the main body and the arm in the vertical direction. It further comprises arm up / down movement driving means for driving.
Further, the arm is composed of a plurality of portions combined so as to be extendable and contractible in the longitudinal direction, and the distance (SID) between the X-ray tube focal point and the image receiving device is changed by extending and contracting the arm in the longitudinal direction. And a tube tube longitudinal drive means.
Arm angle adjusting means provided between the arm rotation driving means and the arm, for adjusting the angle of the arm by swinging the arm in a direction orthogonal to the rotation direction of the arm. It is characterized by that.

Further, X-ray tube section sliding means for sliding the X-ray tube section in a direction orthogonal to the extending and contracting direction of the arm is provided.
Further, X-ray tube rotating means for rotating the X-ray tube portion in the rotation direction of the arm is further provided.
In addition, the X-ray image receiving unit is rotatably mounted coaxially with the rotation axis of the arm,
The arm is provided with a rotation driving means for rotating the X-ray image receiving unit.

Further, the arm is held by a slider that is movable in the vertical direction on the main body,
The arm vertical movement drive means is characterized in that the slider can be adjusted up and down within a range of 0.3 m to 1.6 m from the floor on which the main body is installed.
Further, the arm rotation driving means is characterized in that the arm can be rotated at least 180 degrees in the vertical direction from a horizontal position.

Further, the X-ray tube forward / backward drive means can adjust the distance (SID) between the X-ray tube focal point and the X-ray image receiving surface within a range of at least 1.1 m to 2 m. It is characterized by.
Further, the X-ray tube slide means is characterized in that the X-ray focal point can be moved and adjusted within a range of up to 0.13 m with respect to the center of the image receiving surface.
The rotation driving means of the X-ray image receiving unit is characterized in that the X-ray image receiving unit can be rotated within a range of ± 45 degrees.

  Further, the imaging apparatus operation unit combines the rotation of the arm by the arm rotation driving unit and the rotation of the X-ray image receiving unit by the X-ray image receiving unit rotation driving unit, whereby the X-ray tube unit and the X-ray unit are combined. The angle at which the line image receiving unit faces is constant.

  Furthermore, an X-ray tube unit for irradiating X-rays, an X-ray image receiving unit disposed opposite to the X-ray tube unit, an image processing unit for obtaining an X-ray image from an image received by the X-ray image receiving unit, A distance between the X-ray tube unit and the X-ray image receiving unit is provided so that the X-ray tube unit and the X-ray image receiving unit are opposed to each other, and is expanded and contracted by an X-ray tube front-rear driving means. An arm having an adjustable SID, a main body that rotatably supports the arm, and an end portion that is supported in a horizontal direction by a slider that is movable up and down on the main body and that protrudes to the side of the main body An imaging device operation for operating the X-ray tube unit, the X-ray image receiving unit, and the image processing unit, and an arm rotation driving means comprising a rotating shaft to which the arm is fixed and an electric motor for rotating the rotating shaft forward and backward And an arm for driving the slider in the vertical direction To provide an X-ray imaging apparatus having a kinematic drive means.

Further, an X-ray image receiving portion rotation driving means for rotating the X-ray image receiving portion around the rotation center of the arm, and provided between the arm rotation driving means and the arm, are orthogonal to the rotation direction of the arm. Arm angle adjusting means for adjusting the angle of the arm by swinging the arm in a direction, and X-ray tube section sliding means for sliding the X-ray tube section in a direction perpendicular to the expansion and contraction direction of the arm; X-ray tube section rotating means for rotating the X-ray tube section in the rotation direction of the arm;
It is provided with.

  According to the present invention, since the subject can be imaged from any of the standing position, sitting position, and prone position of the subject with only one X-ray imaging apparatus, chest radiographing and other parts such as extremities It is possible to easily and quickly change the positioning for switching to shooting. In addition, since it is not necessary to install two devices, ie, a chest X-ray imaging apparatus and other general-purpose X-ray imaging apparatuses, installation space and cost can be reduced.

FIG. 1 is a front perspective view of an X-ray imaging apparatus according to Embodiment 1 of the present invention.
FIG. 2 is a perspective view of the rear surface side of the X-ray imaging apparatus according to Embodiment 1 of the present invention.
FIG. 3 is an overall control block diagram of the X-ray imaging apparatus according to Embodiment 1 of the present invention.
FIG. 4 is a perspective view of an X-ray tube vertical drive unit and an arm rotation unit of the X-ray imaging apparatus according to Embodiment 1 of the present invention.
FIG. 5 is a perspective view of a part of an X-ray tube front / rear drive unit of the X-ray imaging apparatus according to Embodiment 1 of the present invention.
FIG. 6 is a partial perspective view of a rotation drive unit of an X-ray image receiving unit of the X-ray imaging apparatus according to Embodiment 1 of the present invention.
FIG. 7 is a diagram for explaining settings when photographing the chest of a subject by the X-ray imaging apparatus according to Embodiment 1 of the present invention.
FIG. 8 is a diagram for explaining settings when photographing the waist of a subject by the X-ray imaging apparatus according to Embodiment 1 of the present invention.
FIG. 9 is a diagram for explaining settings for photographing a subject in a sitting position with the X-ray imaging apparatus according to Embodiment 1 of the present invention.
FIG. 10 is a rear perspective view of the X-ray imaging apparatus according to Embodiment 2 of the present invention.
FIG. 11 is a front perspective view of an X-ray imaging apparatus according to Embodiment 2 of the present invention.
FIG. 12 is an overall control block diagram of the X-ray imaging apparatus according to Embodiment 2 of the present invention.
FIG. 13 is a perspective view of an arm angle adjustment unit of the X-ray imaging apparatus according to Embodiment 2 of the present invention.
FIG. 14 is a cross-sectional view of an essential part of an X-ray tube rotating portion of the X-ray imaging apparatus according to Embodiment 2 of the present invention.
FIG. 15 is a diagram illustrating one setting of the X-ray imaging apparatus according to the second embodiment of the present invention.
FIG. 16 is a diagram for explaining one setting of the X-ray imaging apparatus according to the second embodiment of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Apparatus main body 4 Arm vertical movement drive part 5 Arm rotation drive part 6 Arm 7 X-ray tube back-and-forth drive part 8 X-ray tube slide drive part 9 X-ray image receiving part rotation drive part 10 X-ray tube part 11 Restriction part 12 X-ray image receiving Unit 14 Imaging device operation unit 17 Image processing unit 25 Arm angle adjustment unit 30 X-ray tube rotation unit

Embodiment 1 of the present invention will be described below with reference to the drawings.
1 is a perspective view of the front side of the X-ray imaging apparatus, FIG. 2 is a perspective view of the rear side of the X-ray imaging apparatus, FIG. 3 is a block diagram showing the overall configuration of the X-ray imaging apparatus, and FIG. FIG. 5 is a perspective view of a part of the X-ray tube front / rear drive unit, FIG. 6 is a perspective view of the X-ray image receiving device rotation drive unit, and FIGS. 7 to 9 are settings corresponding to the body position. FIG.

The apparatus main body 1 of the X-ray imaging apparatus has a box-shaped main body case 1a installed on the floor as shown in FIGS. A substrate 1b on which the apparatus main body 1 is placed on the floor is provided at the bottom of the main body case 1a as shown in FIG. A pair of support columns 2 are erected on the substrate 1b.
Guide rails 3 are laid in the vertical direction on the front surface and the outer surface of these columns 2. A slider 4 a that is linearly slidable in the vertical direction is supported by these guide rails 3.

Next, the arm vertical movement drive unit 4 as an example of the arm vertical movement drive means will be described. The arm vertical movement drive unit 4 is guided in the vertical direction of the column 2 by the guide rail 3.
The arm vertical movement drive unit 4 includes a rack laid in the vertical direction on the support column 2, a pinion meshing with the rack, and an electric motor (none of which is shown) that rotationally drives the pinion, and a slider 4a The arm attached to the slider 4b is moved by rotating the electric motor 5c attached to the forward or backward direction. The slider 4a can be adjusted up and down from the lowest position about 0.3 m above the substrate 1b to the uppermost position about 1.6 m above the substrate 1b. The range from about 0.3 m to about 1.6 m is merely an exemplary distance, and may be from 0 m to 3 m, from 0.5 m to 1.6 m, from 0.3 m to 3 m, It may be 0.5 m to 1 m. The number is not limited as long as the implementation is realistic.
The slider 4a of the arm vertical movement drive unit 4 is provided with an arm rotation drive unit 5 that rotates the arm 6 in the direction b shown in FIG.

The configuration of the arm rotation driving unit 5 will be described as an example of the arm rotation driving means.
As shown in FIG. 4, the arm rotation driving unit 5 holds the arm 6. That is, the bearing member 5 b provided at one end of the arm rotation driving unit 5 horizontally supports the rotation shaft 5 a fixed to the base end portion of the arm 6. The bearing member 5b is attached to the upper front portion of the slider 4a and moves up and down as the slider moves up and down. An electric motor 5c serving as a rotational drive source is also fixed to the lower surface of the bearing member 5b on the front surface of the slider 4a. The electric motor 5c is connected to the speed reducer 5d, and the rotation of the electric motor 5c is decelerated by the speed reducer 5d. A gear 5f is fixed to the output shaft 5e of the speed reducer 5d, and the gear 5f is engaged with a gear 5g fixed to the other end of the rotary shaft 5a.

  The slider 4a to which the arm rotation driving unit 5 is attached is on the front surface of the main body case 1a. The entire arm rotation driving unit 5 is covered with a cover 4b so as not to be exposed to the outside. Further, one end side of the rotary shaft 5a protruding in the lateral direction from the slider 4a protrudes further outward than the side surface of the main body case 1a. Since the base end portion of the arm 6 is fixed to one end portion of the rotating shaft 5a protruding outside, even when the arm rotation driving unit 5 rotates the arm 6 about 180 degrees in the b direction via the rotating shaft 5a. The arm 6 does not interfere with the main body case 1a. For example, even if the use range is 360 degrees, interference can be prevented. If it is sufficient if it does not interfere by rotating 90 degrees, 90 degrees may be sufficient.

  Next, the configuration of the arm 6 will be described. The arm 6 is substantially U-shaped as shown in FIG. The arm 6 includes a first arm 6a and a second arm 6b so that the arm 6 can expand and contract in the longitudinal direction. The first arm 6a and the second arm 6b are formed in a substantially rectangular tube shape, and one end side of the second arm 6b is inserted into one end side of the first arm 6a so as to be extendable and contractible.

As shown in FIG. 5, the other end of the first arm 6a constituting the base end side of the arm 6 is provided with a fixed cylinder 6c that fixes the base end of the arm 6 to the rotating shaft 5a. An X-ray tube front / rear drive means is provided inside the first arm 6a.
As an example of the X-ray tube front / rear drive means, the configuration of the X-ray tube front / rear drive unit 7 will be described with reference to FIG. Inside the first arm 6a, a plurality of guide rails 7a laid in the longitudinal direction are provided. A slide member 7b fixed to one end side of the second arm 6b is slidably supported on the guide rails 7a. In this way, the second arm 6b smoothly expands and contracts in the c direction with respect to the first arm 6a.

Furthermore, between each guide rail 7a, the ball screw axis | shaft 7c arrange | positioned in parallel with each guide rail 7a is provided. One end of the ball screw shaft 7c is rotatably supported by a bearing 7d provided in the first arm 6a. Further, a pulley 7e is fixed to one end of the ball screw shaft 7c.
An electric motor 7f is installed inside the other end of the first arm 6a, and an endless belt 7h is provided between a pulley 7g provided on the electric motor 7f and a pulley 7e fixed to one end of the ball screw shaft 7c. Is dressed up. The rotation of the electric motor 7f is transmitted to the ball screw shaft 7c through the endless belt 7h.

  The other end side of the ball screw shaft 7c is screwed into a ball nut 7i provided inside one end side of the second arm 6b. By rotating the ball screw shaft 7c in both directions via the endless belt 7h by the electric motor 7f, the second arm 6b expands and contracts in the c-axis direction. Thereby, the distance between the X-ray tube part 10 attached to the other end side of the 2nd arm 6b and the X-ray image receiving part 12 which consists of an X-ray plane sensor etc. which are mentioned later is in the range of 1.1 m-2m. It can be adjusted back and forth. In addition, said 1.1m-2m is an example, This SID may be adjustable in the range of 0.5 to 3m, may be adjustable in the range of 0.5 to 2m, It may be adjustable in the range of 1.1 m to 3 m, or may be adjustable in the range of 1.3 m to 1.8 m. The number is not limited as long as the implementation is realistic.

The X-ray tube unit 10 is attached to the distal end portion of the arm 6 via the X-ray tube slide drive unit 8. The X-ray tube slide drive unit 8 is provided with an electric motor that slides the X-ray tube unit 10 in a d-axis direction orthogonal to the expansion / contraction direction (c-axis) of the arm 6 in a rectangular case 8a. With this electric motor, the X-ray tube portion 10 can be offset about ± 130 mm in the d-axis direction via a slide mechanism (both not shown).
An X-ray tube (not shown) is accommodated in the X-ray tube unit 10, and X-rays generated from the X-ray tube pass through a diaphragm provided on the front surface of the X-ray tube unit 10. Then, the X-ray image receiving unit 12 is irradiated.

Next, the configuration of the diaphragm unit 11 as an example of the diaphragm means will be described. The diaphragm unit 11 is equipped with diaphragm blades and filters (both not shown) for adjusting the diaphragm of the X-ray irradiation field. The diaphragm unit 11 is movable in the d direction together with the X-ray tube unit 10 by the X-ray tube slide drive unit 8.
Further, in the main body 1, there are an arm vertical drive unit 4, an arm rotation drive unit 5, an X-ray tube front / rear drive unit 7, an X-ray tube slide drive unit 8, and a rotation drive unit 9 of an X-ray image receiving unit described later A control unit 13 for controlling the operation (positioning) is installed.
The photographing device operating means for giving commands to the control unit 13 is installed in the vicinity of the main body 1 and is connected to the control unit 13 by the cable 15.

As an example of the imaging device operation means, the configuration of the imaging device operation unit 14 will be described. An X-ray generation unit 16 that controls a high voltage applied to the X-ray tube unit 10 and the diaphragm unit 11 are also connected to the imaging apparatus operation unit 14. Accordingly, the X-ray irradiation can be controlled by the photographing apparatus operation unit 14, and the diaphragm blades and filters of the diaphragm unit 11 can be controlled.
On the other hand, the X-ray image receiving unit 12 may be an X-ray planar sensor that has been widely used recently, or a CR (Computed Radiograph) using an imaging plate (IP) that has already been widely used. May be.

  The CR stores an X-ray image in an IP having the same shape as the film, and reads a digital image using a dedicated reading means. The X-ray image receiving unit 12 in the case of using an X-ray flat sensor is composed of a phosphor layer and an amorphous silicon sensor, and is composed of an amorphous silicon sensor or the like by converting irradiated X-rays into light with a phosphor. An X-ray image is read by a sensor. Its thickness can be as thin as 10 cm or less. The X-ray image receiving portion 12 is formed in a flat box shape as shown in FIGS. 1 and 2, and an image receiving surface 12a of a flat sensor (both not shown) is located on the front surface. The central portion of the side surface of the X-ray image receiving unit 12 is attached to the base end portion of the arm 6 via the rotation drive unit 9 of the X-ray image receiving unit.

  The rotation drive unit 9 of the X-ray image receiving unit 12 has another rotation shaft 9 a that protrudes to the opposite side of the rotation shaft 5 a that supports the arm 6. One end side of the rotation shaft 9a is fixed to the side surface of the X-ray image receiving portion 12, and the X-ray image receiving portion 12 is rotatable in the e direction around the rotation shaft 9a. The other end of the rotating shaft 9a is rotatably supported by a bearing (not shown) provided in the base end portion of the arm 6 so that the rotating shaft 5a and the center thereof coincide with each other.

As shown in FIG. 6, a pulley 9b is fixed to the rotary shaft 9a. An endless belt 9e is provided between the pulley 9b and a pulley 9d provided in the electric motor 9c so as to transmit the rotation of the electric motor 9c to the rotating shaft 9a.
The electric motor 9c is installed in the base end portion of the arm 6, and can rotate the pulley 9d forward and backward via a reduction gear (not shown). Accordingly, the X-ray image receiving unit 12 can be rotated in the e direction. The control unit 13 simultaneously controls the coaxial arm rotation driving unit 5 and the X-ray image receiving unit rotation driving unit 9 to rotate the X-ray image receiving unit 12 in the same direction as the rotation direction b of the arm 6. In other words, the angle at which the X-ray tube portion and the X-ray image receiving portion face each other can be made constant. By doing so, the subject can be photographed from an oblique direction by rotating the X-ray tube unit 10 together with the arm 6 while maintaining the parallel state of the subject and the X-ray image receiving unit 12.

  A grid (not shown) is also detachably attached to the image receiving surface 12a of the X-ray image receiving unit 12. Furthermore, an image processing unit 17 and an image display unit 18 are connected to the X-ray image receiving unit 12 so that a photographed X-ray image can be displayed on the image display unit 18 in real time. The post-processing of the X-ray image by the image processing unit 17 can enhance the image.

  Next, positioning in the case of performing chest imaging of a subject using the X-ray imaging apparatus described in the first embodiment will be described. When performing chest imaging of a subject, the SID is set to 1.8 to 2 m in order to capture a wide area while keeping the magnification rate low. This is a large distance compared to the SID of about 1.1 m when imaging a region other than the chest.

  In photographing the chest of the subject, first, as shown in FIG. 1, the slider 4 a is moved in the direction a by the arm vertical movement drive unit 4, so that the height of the X-ray image receiving unit 12 is approximately the chest of the subject. Adjust to position. Thereafter, the arm 6 is rotated in the direction b by the arm rotation driving unit 5 to stop the arm 6 at a substantially horizontal position. At this position, the X-ray tube portion 10 and the diaphragm portion 11 provided at one end of the arm 6 and the X-ray image receiving portion 12 provided at the other end of the arm 6 are outside the side surface of the main body case 1a. It arrange | positions so that it may oppose. Thereby, the imaging region of the subject can be captured at the center of the image receiving surface 12 a of the X-ray image receiving unit 12 without being obstructed by the apparatus main body 1.

  Next, the imaging device operation unit 14 installed in the vicinity of the apparatus main body 1 shown in FIG. 3 is operated, and the second arm 6b is moved by the electric motor 7f provided in the X-ray tube front / rear drive unit 7 as shown in FIG. The first arm 6a is moved away from the first arm 6a by a predetermined distance. Thus, the SID is adjusted to about 1.8 to 2 m by separating the X-ray tube unit 10 from the X-ray image receiving unit 12.

  In this state, the subject 20 stands in front of the X-ray image receiving unit 12 as shown in FIG. By operating the imaging device operation unit 14 and moving the slider 4a up and down by the arm up-and-down movement driving unit 4, the X-ray is so positioned that the chest of the subject 20 is correctly positioned between the X-ray tube unit 10 and the X-ray image receiving unit 12. The height of the image receiving unit 12 is finely adjusted, and the X-ray irradiation field is adjusted by opening and closing the diaphragm blades built in the diaphragm unit 11 and the position of the filter is adjusted.

  Further, the height-adjusted X-ray image receiving unit 12 is in the vicinity of the apparatus main body 1, and the imaging surface of the X-ray image receiving unit 12 is substantially flush with the front surface of the main body case 1a. A sufficient space that is not restricted by the main body case 1a is secured between the X-ray image receiving unit 12 and the X-ray image receiving unit 12. Moreover, the X-ray tube unit 10 and the diaphragm unit 11 face the X-ray image receiving unit 12 at a position sufficiently away from the apparatus main body 1. For this reason, the subject 20 can easily stand between the X-ray tube unit 10 and the X-ray image receiving unit 12, and the body case 1a is less likely to feel pressure during imaging.

  When preparation for imaging is completed as described above, X-ray imaging is started by operating the imaging apparatus operation unit 14. X-rays transmitted through the subject 20 and irradiated onto the image receiving surface 12 a of the X-ray image receiving unit 12 are read as X-ray images by the X-ray image receiving unit 12. Thereafter, this image is processed by the image processing unit 17 and displayed on the image display means 18 in real time. In addition, this image is recorded in a recording unit (not shown), and when the X-ray generation unit 16 is connected to a terminal used by a doctor via a hospital network (not shown), it is matched with an imaging order from the doctor. Not only the positioning of the X-ray generator 16 but also the setting of the X-ray conditions and the X-ray irradiation field can be made.

  Further, the arm rotation driving unit 5 and the rotation driving unit 9 of the X-ray image receiving unit which are on the same axis are simultaneously controlled by a command from the imaging apparatus operation unit 14 to X-ray in the same direction as the rotation direction b of the arm 6. The image receiving device 12 is rotated synchronously. In other words, the angle at which the X-ray tube portion and the X-ray image receiving portion face each other can be made constant. In this way, the subject 20 can be imaged from an oblique direction by rotating the X-ray tube unit 10 together with the arm 6 while maintaining the parallel state of the subject 20 and the X-ray image receiving device 12.

On the other hand, FIG. 8 shows a case where X-ray imaging is performed on the waist side surface of the subject 20 using the dedicated moving table 21. The operation will be described below.
In X-ray imaging of the waist side surface of the subject 20, first, the imaging device operation unit 14 is operated to move the slider 4a of the arm vertical movement drive unit 4 up and down to an appropriate height position. Thereafter, the arm rotation driving unit 4 rotates the arm 6 in the clockwise direction in the b direction to make it substantially horizontal. Thereafter, the moving table 21 on which the subject 20 is placed in the prone position or the supine position is moved between the X-ray tube unit 10 and the X-ray image receiving unit 12 as shown in FIG.

  At this time, since the arm 6 rotates about the rotation shaft 5a, the horizontal position of the X-ray image receiving unit attached to the tip of the arm 6 hardly changes. For this reason, the X-ray image receiving part 12 does not protrude significantly from the front of the main body case 1a. Even when the arm 6 is in a substantially horizontal state, a sufficient space that is not restricted by the main body case 1a is secured between the X-ray tube unit 10 and the X-ray image receiving unit 12, and this space ensures the X-ray tube. Since the moving table 21 can be easily moved between the unit 10 and the X-ray image receiving device 12, a trouble of causing the moving table 21 to collide with the main body case 1a can be avoided.

  As shown in FIG. 8, when the movement of the moving table 21 is completed and the waist of the subject 20 is positioned between the X-ray tube unit 10 and the X-ray image receiving device 12, the imaging device operation unit 14 is operated. The imaging apparatus moving unit 14 adjusts the height of the arm 6 so that the waist of the subject 20 is correctly positioned between the X-ray tube unit 10 and the X-ray image receiving unit 12 by the arm vertical movement driving unit 4. At the same time, the SID between the X-ray tube unit 10 and the X-ray image receiving device 12 is adjusted to 1.1 m, for example. When photographing the waist side surface, first, the height of the arm 6 is adjusted by the arm vertical movement drive unit 4. Further, the arm 6 is held in a substantially horizontal state by the arm rotation driving unit 5, and the arm 6 is expanded and contracted while the X-ray tube unit 10 and the X-ray image receiving unit 12 are arranged to face each other. The SID between the line image receiving devices 12 is adjusted to an arbitrary distance. In this way, positioning can be easily performed even when imaging a region other than the chest with a single X-ray imaging apparatus.

  Further, when imaging a region other than the chest, the subject 20 may be in a prone position or a supine position. The arm 6 has a substantially inverted U-shape or a similar shape, and when the arm 6 is substantially horizontal, the portion of the arm 6 positioned between the X-ray tube unit 10 and the X-ray image receiving device 12 has the X-ray tube. The unit 10 and the X-ray image receiving device 12 can be arranged so as to protrude upward from the upper surface. For this reason, even if the X-ray tube unit 10 and the X-ray image receiving device 12 are opposed to each other at a position facing the waist of the subject 20, the central portion of the arm 6 does not contact the subject 20.

  As described above, the X-ray imaging apparatus according to the present embodiment can be combined with the moving table 21 with casters or the stretcher (moving bed). Further, side imaging can be performed with the subject 20 placed on the moving table 21 in a prone or supine position. Further, by changing the posture of the subject 20, it is possible to cope with imaging of the hip joint position, the shoulder joint position, and the like. Conventionally, digital imaging can be performed by the apparatus described in the present embodiment even in a region that cannot be imaged without using a portable cassette.

  Next, a case where X-rays are irradiated so as to be obliquely inclined and the subject 20 is subjected to oblique imaging of the mandible and lumbar spine and spine will be described with reference to FIG. As shown in FIG. 9, the arm 6 is in a substantially vertical state, and the X-ray tube portion 10 is positioned in the upper portion and the X-ray image receiving portion 12 is positioned in the lower portion. The subject 20 is placed between the X-ray tube unit 10 and the X-ray image receiving unit 12 in a prone position or a supine position on the moving table 21. With this position as a reference, the rotation range of the X-ray image receiving unit 12 with respect to the arm 6 by the rotation drive unit 9 of the X-ray image receiving unit is ± 45 degrees, so that all oblique X-ray insertion states can be created. become. Thus, mandibular oblique imaging and lumbar spine and spine imaging can be easily performed. The rotation range is not limited to ± 45 degrees, and may be ± 5 degrees or ± 90 degrees. The number is not limited as long as the implementation is realistic.

  When imaging the shoulder or elbow with the subject 20 placed on the moving table 21, positioning the shoulder or elbow at an appropriate position without irradiating the head of the subject 20 with X-rays The work is very troublesome. As described above, the X-ray tube section 10 can be offset by 0.13 m in the vertical direction by the X-ray tube slide drive section 8 in the direction orthogonal to the long axis direction of the arm 6, that is, in the d direction. Usually, when photographing the elbow, the other partial photographing is performed in a size of four cuts while the large angle is 430 mm × 430 mm. In the case of imaging in the four-cut size, the X-ray tube unit 10 can be handled by offsetting ± 0.13 m by the X-ray tube slide drive unit 8. As a result, the time for reading an image from the X-ray image receiving unit can be shortened. However, the offset amount is not limited to ± 0.13 m, and may be ± 0.05 m or ± 0.30 m. The number is not limited as long as the implementation is realistic.

  Next, a case where the ankle of the subject 20 is photographed in a sitting position on a wheelchair will be described. In order to cope with such a case, the slider 4 of the arm vertical movement drive unit 4 can be lowered from the bottom surface of the apparatus main body 1 to about 0.3 m. That is, the length from the rotating shaft 5a to the lower end of the X-ray image receiving unit 12 can be about 0.3 m. Further, the arm rotation driving unit 5 is rotated to make the arm horizontal. In this way, the X-ray tube unit 10 and the X-ray image receiving unit 12 can be installed so as to face each other on the installation surface of the X-ray imaging apparatus. For this reason, imaging | photography of an ankle etc. is attained in the state which put the leg of the subject 20 on the step of the wheelchair.

  As described above, the present apparatus can arbitrarily set the height of the arm 6 by the arm up-and-down movement driving unit 4 and can arbitrarily set the inclination of the arm 6 by the arm rotation driving unit 5. Can take pictures of the limbs such as ankles and elbows even while sitting in a wheelchair, and the arm 6 can rotate 180 degrees, so tilting photography from 45 degrees to 45 degrees It is.

  It should be noted that an X-ray image receiving unit intended for photographing a large field of view for the chest and having a size of about 430 mm × 430 mm cannot photograph the ankle of the subject 20 or the elbow of a child whose feet do not move freely. Sometimes. This is because the imaging region does not reach the center of the image receiving surface 12a of the X-ray image receiving device 12. In such a case, the X-ray tube unit 10 is slid in the direction d shown in FIG. 5 by the X-ray tube slide drive unit 8 provided at one end of the arm 6 so that the X-ray focal point is set to the center of the image receiving surface 12a. The X-ray irradiation field is controlled by the diaphragm unit 11 and the image capturing range of the X-ray image receiving unit 12 is linked to the X-ray irradiation field so that ankles and children's elbows can be photographed efficiently. Can do.

  Further, the sliding direction is made to coincide with the lattice direction of a detachable grid (not shown) disposed in front of the X-ray image receiving unit 12. The grid is mainly used for the purpose of eliminating the adverse effects of scattered radiation when photographing adults. In this device, the slide direction of the X-ray tube coincides with the grid direction of the grid, so the position of the X-ray tube is Even if the image is taken with an offset, a moire-like shadow due to the grid does not appear on the X-ray image. Usually, in order to avoid the influence of exposure, the child is often taken at a low tube voltage of 50 to 70 KV or less, and the grid is often removed because the influence of scattered radiation is small. Further, it is easy to correct the center of the imaging range and the center of the image receiving surface 12a of the X-ray image receiving unit 12 when photographing the chest of a child.

  Embodiment 2 of the present invention will be described below with reference to the drawings. 10 to 16 show the second embodiment. In addition, the same code | symbol is attached | subjected to the part same as Example 1, and the description is abbreviate | omitted. The X-ray imaging apparatus described in the second embodiment is obtained by adding an arm angle adjusting unit and an X-ray tube rotating unit 30 described later to the X-ray imaging apparatus described in the first embodiment. By setting the angle of the arm 6 in the direction f perpendicular to the rotational direction b of the arm 6 by the arm angle adjusting means, angle setting (double angle) in two directions is possible. In addition, by rotating the X-ray tube unit 10 with the arm 6 substantially horizontal, X-ray imaging of the subject 20 in a supine position using a cassette or the like is also possible.

  Hereinafter, the configuration of the arm angle adjusting unit 25 will be described as an example of the arm angle adjusting means. 10 and 11, the arm angle adjusting unit 25 is attached to the tip end of the rotating shaft 5 a protruding from the side of the slider 4 a that moves the arm 6 up and down. The arm angle adjustment unit 25 includes a support arm 25a that is rotatable in the direction b integrally with the rotation shaft 5a and has a substantially U-shape, and a bracket 25b that protrudes from a side surface of the support arm 25a. In FIG. 10, between the open end portions 25c of the support arm 25a, both end sides of a support shaft 25d provided in a direction orthogonal to the rotation shaft 5a are rotatably supported and project vertically from the open end portion 25c. The upper and lower ends of the support shaft 25d thus fixed are fixed to brackets 6d and 6e protruding from the back surface of the arm 6. The arm 6 can swing in the f direction about the support shaft 25d. Arm driving means for rotating the arm 6 is provided on the support arm 25a.

Next, the configuration of the arm drive unit 26 will be described as an example of arm drive means.
As shown in FIG. 13, the arm drive unit 26 includes a rotation drive source 26a including a reversible rotation motor attached to the side surface of the support arm 25a, a reduction unit 26b including a worm reduction device, a rotation drive source 26a, and a deceleration. It consists of a bevel gear box 26c that connects the part 26b. A worm (not shown) fixed to the worm shaft 26d of the speed reducing portion 26b is engaged with a worm wheel (not shown) fixed to the support shaft 25d. By rotating the worm shaft 26d forward and backward through the bevel gear box 26c by the rotational drive source 26a, the angle of the arm 6 can be adjusted in the f direction around the support shaft 25d.

  Also, a position detector 27 such as a rotary encoder that detects the rotation angle of the arm 6 and a limit switch that stops the arm 6 at a predetermined angle is provided below the deceleration unit 26b. Further, a braking portion 28 is provided that is an electromagnetic brake that fixes the arm 6 at the angle adjustment position by braking the rotation of the support shaft 25d. The tip of the worm shaft 26d protrudes from the side of the speed reduction portion 26b. If a handle (not shown) is attached to the tip of the worm shaft 26d, the worm shaft 26d can be manually rotated. Therefore, the arm 6 can be manually rotated during an emergency stop or power failure.

Next, the configuration of the X-ray tube rotating unit 30 will be described as an example of the X-ray tube rotating means. As shown in FIG. 14, the X-ray tube rotating part 30 is provided between the case 8a of the slide part 8 and the X-ray tube part 10, and one end of the rotating shaft 30b is placed in the housing 30a attached to the case 8a. The side is rotatably supported via a bearing 30c.
The bearing 30c is composed of an oil-impregnated bush 30d and a thrust washer 30e, and rotatably supports the rotary shaft 30b. The X-ray tube portion 10 is provided at the other end of the rotary shaft 30b protruding from the housing 30a. It is fixed. The housing 30a is provided with a rotation drive unit made of an electric motor (not shown), and the rotation drive unit rotates the rotary shaft 30b forward and backward via the reduction gear 30f. As a result, the X-ray tube portion 10 can be rotated approximately 180 degrees in the g direction about the rotation shaft 30b.

Next, the operation of the X-ray imaging apparatus according to the second embodiment will be described. Since X-ray imaging with the subject 20 in a standing or lying posture is the same as in the first embodiment, the description thereof is omitted.
When an X-ray imaging apparatus is used in orthopedics or the like, a region of interest such as a joint may be imaged from the front. At this time, imaging is performed by changing the direction of the body of the subject 20 from the posture of sitting or lying. If the posture of the subject 20 is unreasonable and cannot withstand imaging, a region of interest is fixed in the X-ray irradiation direction by applying a triangular or R-shaped imaging aid to the subject 20. However, in this method, it takes time to fix the region of interest at a predetermined position, and the imaging efficiency is poor.

The setting of the X-ray imaging apparatus according to the second embodiment in such a case will be described. FIG. 11 shows an X-ray imaging apparatus according to the second embodiment. First, the arm rotation driving unit 5 rotates the arm 6 in the b direction and positions it at a predetermined position. Next, the arm 6 is swung in the f-axis direction by the arm angle adjusting unit 25.
That is, by combining the rotation in the b-axis direction and the rotation in the f-axis direction, it is possible to perform shooting by adjusting the angle α and the angle β in two directions (double angle) as shown in FIG. This makes it possible to image a region of interest without using an imaging aid. This improves the work efficiency and eliminates the necessity of forcing the subject 20 into an unreasonable posture, thereby reducing the burden on the subject 20.

  The angle adjustment of the arm 6 in the direction f is performed by swinging the support shaft 25d via the speed reduction unit 26b by the rotation drive source 26a provided in the arm angle adjustment unit 25. While the arm 6 is rotated by the rotational drive source 26a, the brake shaft 28, which is an electromagnetic brake provided on the support shaft 25d, is energized to release the support shaft 25d. When the arm 6 is stopped at the adjustment position, the energization of the brake unit 28 is turned off, and the brake unit 28 fixes the support shaft 25d at that position. For this reason, the arm 6 does not move carelessly during X-ray imaging. By providing the braking unit 28 on the support shaft 25d side instead of the rotational drive source 26a side, the power source 26a of the X-ray imaging apparatus can be turned off, or if the support shaft 25d is in a braking state by the braking unit 28 even during a power failure, The arm 6 does not rotate carelessly. Thus, high safety is obtained.

  However, when the subject 6 is between the X-ray tube unit 10 and the X-ray image receiving unit 12 while the arm 6 is adjusted in the f direction, the arm angle adjusting unit 25 and the apparatus main body 1 are urgently stopped. There is a case. Or the apparatus main body 1 may not be able to drive at the time of a power failure. In such a case, a handle is attached to the worm shaft 26d of the speed reducing portion 26b, and the worm shaft 26d is manually rotated by the handle. By doing so, the arm 6 can be rotated, so that the X-ray tube unit 10 and the X-ray image receiving unit 12 can be manually returned to their original positions.

Next, a description will be given of a case of imaging in which the order of the imaging part instructed by a doctor or the like frequently changes from standing to lying, and from standing to standing. In the case where the imaging region changes with the body position, in FIG. 11, if the arm 6 is rotated in the b direction each time, it takes time for imaging and the work efficiency is poor.
In such a case, the arm 6 is held almost horizontally as shown in FIG. 16 in both the standing position and the recumbent position, and the X tube apparatus 10 is moved approximately 90 by the rotation driving means of the X-ray apparatus rotating means 30 when photographing in the recumbent position. Rotate the X-ray irradiation direction downward.
Then, by performing imaging using a portable cassette that is separately prepared instead of the X-ray image receiving unit 12, the subject 20 in the lying posture can be imaged without rotating the arm 6. In this way, the shooting time can be further shortened. In addition, by such a method, it is possible to perform imaging that exceeds the operating range of the X-ray imaging apparatus.

As described above, according to the X-ray imaging apparatus described in the second embodiment, imaging can be performed by angle adjustment (double angle) in two directions, and even when the arm 6 is held almost horizontally, X-ray photography becomes possible at the position.
In both the first and second embodiments, when the X-ray imaging apparatus is installed in a room with a low ceiling, the arm 6 is driven by the arm rotation driving unit 5 while the slider 4a is supported at a relatively low position. Is rotated in the direction b so as to be substantially horizontal, and thereafter, the slider 4a is driven to the upper chest position by the arm vertical movement drive unit 4. With this procedure, the arm 6 can be operated without any trouble even in a room with a relatively low ceiling.

Further, by connecting the X-ray imaging apparatus according to the present invention to the hospital network, it is possible to achieve automation of imaging positioning. Although a digital X-ray image receiving apparatus is generally expensive, it is possible to perform imaging from the chest to the limbs using only the main body without using other apparatuses and instruments. For this reason, the installation space can be reduced. In addition, the X-ray technician moves the working time for moving a long lead wire for moving the X-ray imaging apparatus, selecting the size of the portable cassette, carrying and developing, the time for contacting the subject 20 and the diagnostic image. It will be possible to apply to the work that should be done, such as confirmation.
In the X-ray imaging apparatus described in the embodiment of the present invention, an FPD is used as a digital X-ray image receiving apparatus. However, the present invention can be similarly applied to other digital X-ray image receiving apparatuses.

  By providing only one X-ray imaging device, it is possible to meet all types of imaging needs, contributing to cost reduction and time reduction of diagnosis, space saving and storage. Furthermore, the X-ray diagnostic apparatus can be used for remote diagnosis, hospital network (HIS), radiology network (RIS), and the like.

[Claims]
[Claim 1]
An X-ray tube that emits X-rays;
An X-ray image receiving portion disposed opposite to the X-ray tube portion;
About the X-ray center line that holds the X-ray tube part and the X-ray image receiving part and connects the X-ray tube part and the center of the X-ray image receiving part, at least the direction and position on the vertical plane of the X-ray center line Or a holding part capable of changing one of the lengths of the X-ray center line;
An X-ray imaging apparatus comprising: an image processing unit that obtains an X-ray image from an image received by the X-ray image receiving unit.
[Claim 2]
The holding unit includes an arm that is movable by mounting the X-ray tube unit and the X-ray image receiving unit, and a main body that holds the arm,
An imaging device that moves the arm so that the subject can be imaged from any of standing, sitting, and lying positions by changing the direction and position of the X-ray center line on the vertical plane. The X-ray imaging apparatus according to claim 1, further comprising an operation unit.
[Claim 3]
The arm is provided so that the X-ray tube device and the X-ray image receiving device are opposed to both ends thereof,
Arm rotation driving means for rotating the arm on the side of the main body;
Arm vertical movement drive means for driving the arm in the vertical direction;
The X-ray imaging apparatus according to claim 2, further comprising:
[Claim 4]
The arm is composed of a plurality of parts combined to extend and contract in the longitudinal direction,
The X-ray tube front-rear drive means for changing the distance (SID) between the X-ray tube focus and the image receiving device by expanding and contracting the arm in the longitudinal direction is further provided. X-ray imaging apparatus described in 1.
[Claim 5]
Arm angle adjusting means that is provided between the arm rotation driving means and the arm and adjusts the angle of the arm by swinging the arm in a direction orthogonal to the rotation direction of the arm. The X-ray imaging apparatus according to claim 2, wherein:
[Claim 6]
6. The X-ray imaging apparatus according to claim 4, further comprising: X-ray tube section sliding means that slides the X-ray tube section in a direction orthogonal to the extending and contracting direction of the arm.
[Claim 7]
The X-ray imaging apparatus according to claim 2, further comprising an X-ray tube rotating unit that rotates the X-ray tube unit in a rotation direction of the arm.
[Claim 8]
The X-ray image receiving unit is rotatably mounted coaxially with the rotation axis of the arm,
The X-ray imaging apparatus according to claim 2, wherein the arm is provided with a rotation driving unit that rotates the X-ray image receiving unit.
[Claim 9]
The arm is held by a vertically movable slider on the body,
9. The X according to claim 2, wherein the arm vertical movement drive means can adjust the slider up and down within a range of 0.3 m to 1.6 m from a floor on which the main body is installed. X-ray equipment.
10. Claim
The X-ray imaging apparatus according to claim 3, wherein the arm rotation driving unit is capable of rotating the arm at least 180 degrees in a vertical direction from a horizontal position.
11. Claims
The X-ray tube back-and-forth movement drive means can adjust the distance (SID) between the X-ray tube focal point and the X-ray image receiving surface within a range of at least 1.1 m to 2 m. The X-ray imaging apparatus according to claim 4.
[Claim 12]
The X-ray imaging apparatus according to claim 6, wherein the X-ray tube slide means can adjust the movement of the X-ray focal point within a range of up to 0.13 m with respect to the center of the image receiving surface.
13. Claims
9. The X-ray imaging apparatus according to claim 8, wherein the rotation driving means of the X-ray image receiving unit is capable of rotating the X-ray image receiving unit within a range of ± 45 degrees.
14. The method of claim 14
The imaging apparatus operation unit combines the rotation of the arm by the arm rotation driving unit and the rotation of the X-ray image receiving unit by the X-ray image receiving unit rotation driving unit, so that the X-ray tube unit and the X-ray image receiving unit are combined. The X-ray imaging apparatus according to claim 8, wherein an angle at which the unit faces is constant.
[ Claim 15 ]
An X-ray tube that emits X-rays;
An X-ray image receiving portion disposed opposite to the X-ray tube portion;
An image processing unit for obtaining an X-ray image from an image received by the X-ray image receiving unit;
The X-ray tube portion and the X-ray image receiving portion are provided on both end sides so as to face each other, and are expanded and contracted by an X-ray tube front-rear drive means, so An arm with an adjustable distance SID;
A main body rotatably supporting the arm;
A rotary shaft that is supported in a horizontal direction by a slider that is movable up and down on the main body and that has the arm fixed to an end projecting to the side of the main body, and an electric motor that rotates the rotary shaft forward and backward. An arm rotation driving means comprising:
An imaging apparatus operating means for operating the X-ray tube unit, the X-ray image receiving unit, and the image processing unit;
Arm vertical drive means for driving the slider in the vertical direction;
An X-ray imaging apparatus comprising:
16.
X-ray image receiving unit rotation driving means for rotating the X-ray image receiving unit around the rotation center of the arm;
Arm angle adjusting means, which is provided between the arm rotation driving means and the arm, and adjusts the angle of the arm by swinging the arm in a direction perpendicular to the rotation direction of the arm;
X-ray tube section sliding means for sliding the X-ray tube section in a direction perpendicular to the extending and contracting direction of the arm;
X-ray tube section rotating means for rotating the X-ray tube section in the rotation direction of the arm;
The X-ray imaging apparatus according to claim 15, comprising:

Claims (16)

An X-ray tube that emits X-rays;
An X-ray image receiving portion disposed opposite to the X-ray tube portion;
About the X-ray center line that holds the X-ray tube part and the X-ray image receiving part and connects the X-ray tube part and the center of the X-ray image receiving part, at least the direction and position on the vertical plane of the X-ray center line Or a holding part capable of changing one of the lengths of the X-ray center line;
An X-ray imaging apparatus comprising: an image processing unit that obtains an X-ray image from an image received by the X-ray image receiving unit. The holding unit includes an arm that is movable by mounting the X-ray tube unit and the X-ray image receiving unit, and a main body that holds the arm,
An imaging device that moves the arm so that the subject can be imaged from any of standing, sitting, and lying positions by changing the direction and position of the X-ray center line on the vertical plane. The X-ray imaging apparatus according to claim 1, further comprising an operation unit. The arm is provided so that the X-ray tube device and the X-ray image receiving device are opposed to both ends thereof,
Arm rotation driving means for rotating the arm on the side of the main body; arm vertical movement driving means for driving the arm in the vertical direction;
The X-ray imaging apparatus according to claim 2, further comprising: The arm is composed of a plurality of portions combined to be extendable in the longitudinal direction, and the X-ray tube changes the distance (SID) between the X-ray tube focal point and the image receiving device by extending and contracting the arm in the longitudinal direction. The X-ray imaging apparatus according to claim 2, further comprising front and rear driving means. Arm angle adjusting means that is provided between the arm rotation driving means and the arm and adjusts the angle of the arm by swinging the arm in a direction orthogonal to the rotation direction of the arm. The X-ray imaging apparatus according to claim 2, wherein: 6. The X-ray imaging apparatus according to claim 4, further comprising: X-ray tube section sliding means that slides the X-ray tube section in a direction orthogonal to the extending and contracting direction of the arm. The X-ray imaging apparatus according to claim 2, further comprising an X-ray tube rotating unit that rotates the X-ray tube unit in a rotation direction of the arm. (Fig. 16) The X-ray image receiving unit is rotatably mounted coaxially with the rotation axis of the arm,
The X-ray imaging apparatus according to claim 2, wherein the arm is provided with a rotation driving unit that rotates the X-ray image receiving unit. The arm is held by a vertically movable slider on the body,
9. The X according to claim 2, wherein the arm vertical movement drive means can adjust the slider up and down within a range of 0.3 m to 1.6 m from a floor on which the main body is installed. X-ray equipment. The X-ray imaging apparatus according to claim 3, wherein the arm rotation driving unit is capable of rotating the arm at least 180 degrees in a vertical direction from a horizontal position. The X-ray tube back-and-forth movement drive means can adjust the distance (SID) between the X-ray tube focal point and the X-ray image receiving surface within a range of at least 1.1 m to 2 m. The X-ray imaging apparatus according to claim 4. 7. The X-ray imaging apparatus according to claim 6, wherein the X-ray tube slide means can adjust the movement of the X-ray focal point within a range of up to 0.13 m with respect to the center of the image receiving surface. 9. The X-ray imaging apparatus according to claim 8, wherein the rotation driving means of the X-ray image receiving unit is capable of rotating the X-ray image receiving unit within a range of ± 45 degrees. The imaging apparatus operation unit combines the rotation of the arm by the arm rotation driving unit and the rotation of the X-ray image receiving unit by the X-ray image receiving unit rotation driving unit, so that the X-ray tube unit and the X-ray image receiving unit are combined. The X-ray imaging apparatus according to claim 8, wherein an angle at which the unit faces is constant. An X-ray tube that emits X-rays;
An X-ray image receiving portion disposed opposite to the X-ray tube portion;
An image processing unit for obtaining an X-ray image from an image received by the X-ray image receiving unit;
The X-ray tube portion and the X-ray image receiving portion are provided on both end sides so as to face each other, and are expanded and contracted by the X-ray tube front-rear driving means, thereby providing a space between the X-ray tube portion and the X-ray image receiving portion. An arm with an adjustable distance SID;
A main body rotatably supporting the arm;
A rotary shaft that is supported in a horizontal direction by a slider that is movable up and down on the main body and that has the arm fixed to an end projecting to the side of the main body, and an electric motor that rotates the rotary shaft forward and backward. An arm rotation driving means comprising:
An imaging apparatus operating means for operating the X-ray tube unit, the X-ray image receiving unit, and the image processing unit;
Arm vertical movement drive means for driving the slider in the vertical direction;
An X-ray imaging apparatus comprising: X-ray image receiving unit rotation driving means for rotating the X-ray image receiving unit around the rotation center of the arm;
Arm angle adjusting means, which is provided between the arm rotation driving means and the arm, and adjusts the angle of the arm by swinging the arm in a direction perpendicular to the rotation direction of the arm;
X-ray tube section sliding means for sliding the X-ray tube section in a direction perpendicular to the extending and contracting direction of the arm;
X-ray tube section rotating means for rotating the X-ray tube section in the rotation direction of the arm;
The X-ray imaging apparatus according to claim 15, comprising:

Images