JP2000279405A - X-ray radiographing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily execute general photography and laminagraphy by arranging a cut surface setting unit on the floor of a rear side part in a photography base, which is provided with a connection rod for connecting an X-ray tube held by means of a travelling type X-ray tube holder to a cassette holding body held in the lower part of the top plate of the photography base so as to be movable in a longitudinal direction. SOLUTION: When laminagraphy is executed, a connection rod 4 is inserted to a rocking core shaft 2 of a cut surface setting unit 20 and set and, then, the upper end of the rod 4 is connected to a horizontal arm 45 of the on-floor travelling type X-ray tube holder 40 by a connection bar 55. Besides, the lower end part of the rod 4 is connected to a cassette holder 34 by a connection bar 56. In this state, the holder 40 is moved along a rail 41 with a travelling truck 42. In this case, the laminagraphic image of a testee body is recorded on a film in the cassette holding body 34 by X-rays radiated from the tube 46. In the meantime, when general photography is executed, the connection of the holding body 34 and the holder 40 by the connection rod 4 is disconnected, the holder 40 is independently moved and the general photography is executed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an X-ray imaging apparatus, and more particularly, to an imaging table having a cassette holder that can move in the longitudinal direction of a top plate under the top plate, and an X-ray tube held above the top plate. The present invention relates to an X-ray imaging apparatus that is combined with a traveling X-ray tube holder that moves along the top plate longitudinal direction.

[0002]

2. Description of the Related Art As a simple tomography apparatus, an X-ray tube holder such as a floor-traveling type or a ceiling-traveling type is combined with an imaging table, and the X-ray tube holder is held above the top of the imaging table by a traveling X-ray tube holder. The X-ray tube is connected to a film holder such as a cassette tray and a booklet at the lower part of the top plate by a swingable connecting rod with the cut surface of the cut surface setting unit serving as a fulcrum.
2. Description of the Related Art An X-ray imaging apparatus in which a tube and a film holder are synchronously moved in opposite directions to each other to perform tomographic imaging has been put to practical use.

As shown in FIG. 3, this type of X-ray apparatus includes an imaging table 30 and a section setting unit 50 for cutting the X-ray tube holder 40 on the floor, and the imaging table 30 is installed on the floor F. Plate 31 and a top plate support frame 33 for supporting a top plate 32 provided thereon movably in the longitudinal direction thereof.
And a cassette holder 34 that holds a cassette housed in the top support frame 33 so as to be movable in the longitudinal direction (the left-right direction in FIG. 7A) below the top 32.

The X-ray holder 40 for traveling on the floor includes a rail 41 laid along the longitudinal direction of the top plate 32 on the floor F on the rear side of the imaging table 30, and wheels (not shown) mounted on the rail 41. A traveling vehicle 42 having a rotation driving mechanism thereof, a column 43 erected on the traveling vehicle 42, a movable body 44 that can move up and down along the column 43, and a horizontal arm 45 supported by the movable body 44. X is attached to the tip of this horizontal arm 45.
A wire tube 46 is held.

Further, the cutting section setting unit 50 has a horizontal leg 51 integrally connected to the base 31 at one end by a fastening mechanism (not shown) provided on the base 31 of the photographing table 30.
a, and a holding frame 51 composed of a vertical leg 51b erected from the leg 51a, an oscillating core shaft (fulcrum) 52 rotatable about a horizontal axis P supported on the vertical leg 51b so as to be movable up and down, The upper end is slidably supported by the swinging shaft 52 and the upper end is detachably attached to the horizontal arm 45 of the X-ray tube holder 40 on the floor, and the lower end is detachably attached to the cassette holder 34 of the imaging table 30 and is detachably slidable. And a connecting rod 53 which engages as much as possible. In addition, 5
Reference numeral 4 denotes a horizontal axis P, that is, a pointer fixed to an oscillating core shaft 52 indicating a cut surface, 55 denotes a connecting bar connecting the horizontal arm 45 and the upper end of the connecting rod 53, and 56 denotes a cassette holder 34.
Is provided on the cassette holder 34 by a connecting bar that is detachably and slidably engaged with the lower end of the connecting rod 53.

When the X-ray imaging apparatus having such a configuration is used for tomography, first, the horizontal leg 51a of the holding frame 51 of the cutting section setting unit 50 is integrally connected to the base 31 by a fastening mechanism. Then, the upper end of the connecting rod 53 and the horizontal arm 45 of the X-ray tube holder 40 traveling on the floor are connected by a connecting bar 55, and the lower end of the connecting rod 53 and the cassette holder 34 are connected.
After the X-ray tube holder 40 is moved along the rail 41 by the rotary drive mechanism of the traveling carriage 42, the connecting rod 53 is moved to the horizontal axis P of the swing center shaft 52. , The X-ray tube 46 supported by the horizontal arm 45 and the cassette holder 34 below the top plate 32 of the imaging table 30 move horizontally in the opposite direction about the horizontal axis P. Then, a tomographic image of the subject on the top plate 32 is recorded on a film in the cassette holder 35.

When used for general photographing, the connecting bar 56 and the connecting rod 53 of the cassette holder 34 and / or the horizontal arm 45 of the X-ray tube holder 40 traveling on the floor are connected. The connection with the rod 53 is released and the holding frame 5 is released.
The horizontal section 51a and the base 31 of the imaging table 30 are released from each other, the cutting section setting unit 50 is detached from the imaging table 30, and the mechanical connection between the imaging table 30 and the floor traveling X-ray tube holder 40 is performed. Break the bond. In this state, the floor traveling type X-ray tube holder 40 is moved along the rail 41 by the rotation driving mechanism of the traveling carriage 42, or the clutch of the rotation driving mechanism is disengaged and manually operated along the rail 41. By moving, it can be used for general imaging other than tomography.

[0008]

A conventional X-ray imaging apparatus in which an imaging table and a traveling X-ray tube holder are combined to perform tomography and general imaging has the following problems.
Since the cutting plane setting unit 50 is connected to the photographing table to define the cutting plane, it is integrally and removably connected to the swing core shaft 52 and the vertical leg 51b that supports the swinging shaft 52 so as to be able to move up and down. Holding frame 5 made of horizontal leg 51b
1 is required to have a predetermined rigidity, so that the weight reduction is limited, and the work of attaching and detaching the cutting surface setting unit 50, which is a heavy object, to and from the photographing table 30 is complicated and poor in workability.
There is a problem that a storage space for the detached cutting section setting unit 50 is also required.

The connecting bar 56 of the cassette holder 34
And / or a floor traveling type X
The connection between the horizontal arm 45 of the X-ray tube holder 40 and the connecting rod 53 is released, and the mechanical connection between the cassette holder 34 and the horizontal arm 45 of the X-ray tube holder 40 on the floor is released, and the holding frame is released. Although the general photographing can be performed in a state in which the holding frame 51 is attached to the imaging table 30, the rear side (back surface) of the imaging table 30 on the top plate 31, and The holding frame 51 occupies the working space on the top plate 32,
There is a problem that it becomes an obstacle when positioning the subject (patient), performing a treatment, and the like.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and requires the work of attaching and detaching a cutting plane setting unit to and from an imaging table in accordance with the use of tomography and other general imaging. It is an object of the present invention to provide an X-ray imaging apparatus that does not perform the operation.

[0011]

In order to achieve the above-mentioned object, an X-ray imaging apparatus according to the present invention comprises an X-ray tube held by a traveling X-ray tube holder and a lower portion of a top of an imaging table. A cutting section setting unit having a connecting rod that swings around the cutting section as a fulcrum by connecting the cassette holding body movably held in the longitudinal direction thereof to the floor, It is characterized by.

[0012] The support may have a fulcrum of the connecting rod at an upper portion where the cut section setting unit stands upright from the floor. Furthermore, it is preferable that the fulcrum of the connecting rod provided on the support can be moved up and down, and that the fulcrum of the connecting rod provided on the support is lower than the height of the top plate of the imaging stand.

The X-ray imaging apparatus according to the present invention is configured as described above, and at the time of general imaging, a cut section of the cassette holding body and / or the X-ray tube held by the traveling X-ray tube holder. The connection between the setting unit and the connecting rod is released, and the traveling X-ray tube holder is moved along its traveling drive mechanism or manually along the longitudinal direction of the top plate. At this time, the cutting surface setting unit having the connecting rod that swings around the cutting surface as a fulcrum,
Since it is arranged on the floor on the rear side (rear side) of the imaging table, the connection between the cassette holder and / or the connecting rod of the X-ray tube held on the floor traveling X-ray holder is released. In this way, it is possible to perform general photographing, and it is not necessary to remove the cutting plane setting unit from the photographing table unlike the conventional device of this type, and the top of the top plate is opened including the space on the rear side of the photographing table Therefore, the positioning of the subject (patient), the treatment, and the like do not cause any trouble even if the cutting plane setting unit is present.

The X-rays held by the traveling X-ray tube holder are
Disconnecting the connecting rod of the wire tube and the cutting section setting unit of the set holder from the connecting rod, and vertically supporting the connecting rod on the floor at the fulcrum that defines the cutting section, there is no need for a storage place for the connecting rod, and connection Even if the rod is vertically supported by the fulcrum, it is located at the rear side of the imaging table, so that it does not interfere with positioning of the subject (patient), treatment, and the like. Further, even if the connection between the connecting rod and the setting holder is released, and the connecting rod swings around the fulcrum that defines the cutting cross-section by moving the traveling X-ray tube holder, the cutting section setting unit remains on the imaging table. Since it is located on the rear side, no problem occurs in positioning, treatment, etc. of the subject (patient).

Further, when the imaging table is of a fixed-top type, the cutting plane can be arbitrarily set by raising and lowering the position of a fulcrum that defines the cutting plane. If the lowering position is set lower than the height of the top of the imaging table, the rear space on the top of the imaging table is widened, and the operability such as positioning of a subject (patient) and treatment is further improved. When the imaging table is of a top-down type, the position of the fulcrum that defines the cutting plane is fixed, and the cutting plane is set by raising and lowering the top, and the height of the fixed fulcrum is adjusted by the top. It is advantageous to keep it slightly lower than the highest height.

On the other hand, at the time of tomography, the X-ray tube held by the traveling X-ray tube holder and the cassette holder of the imaging table are connected to the connecting rod of the cutting plane setting unit, and then the traveling X-ray tube holding device is held. When the container is moved along the longitudinal direction of the top plate by its traveling mechanism, the connecting rod swings (rotates) about the fulcrum, and accordingly, the X-ray held by the traveling X-ray holder. The tube and the cassette holder below the top of the imaging table horizontally move in opposite directions with respect to the fulcrum, and a tomographic image of the subject on the top is recorded on a film in the cassette holder, and tomography is performed.

In this tomography, it is only necessary to connect the X-ray tube held by the traveling X-ray tube holder and the cassette holder at the lower part of the top plate of the imaging table to the connecting rod of the cutting setting unit. There is no need to mount the cut plane setting unit on the imaging table as in this type of apparatus. In addition, since the cutting plane setting unit having the fulcrum is installed on the floor, it can have sufficient rigidity, so that the setting accuracy of the cutting plane can be improved, and the fulcrum does not move during tomography, Image quality can be improved.

[0018]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a diagram showing a schematic configuration of an X-ray imaging apparatus according to an embodiment, where (a) is a front view,
FIG. 2B is a side view, and FIG. 2 is a cross-sectional view showing the configuration of a cut surface setting unit of the embodiment. The same components as those in FIG.

In FIG. 1, reference numeral 20 denotes a cutting section setting unit which is a main part of the present invention, which is arranged on a floor F on the rear side (rear side) of a photographing table 30. In this embodiment, the structure is shown in FIG. As shown in the figure, a fixed column 1 fixed to a floor F, a movable column 3 having a rocking core shaft 2 as a fulcrum that defines a cutting section at an upper end portion guided by the fixed column 1 and ascending and descending, a rocking core shaft 2 is slidably engaged with the X-ray tube 46, the upper end of which is held by the X-ray tube holder 40 on the floor during tomography, and the lower end is a cassette holder 34 on the lower surface of the top plate 32 of the imaging table 30. And a connecting rod 4 connected to the connecting rod.

A screw rod 6 having a bevel gear 5 is rotatably mounted upright on a bottom of the fixed support 1 via a bearing 7. The bevel gear 5 is a motor disposed on the bottom of the fixed support 1. 8 meshes with a bevel gear 9 driven to rotate.
A nut 10 is fixed inside the movable support 3, and the nut 10 is screwed into a screw rod 6 erected inside the fixed support 1. Therefore, the movable column 3 is rotated by the forward / reverse rotation of the motor 8.
Moves up and down with respect to the fixed support 1.

The oscillating core shaft 2 as a fulcrum for defining the cutting section
Is a cylindrical portion 11 that slidably supports the connecting rod 4 in the embodiment.
And a horizontal axis 12 orthogonal to the axis of the cylindrical portion 11. The horizontal axis 12 is rotatably supported on the upper end of the movable column 3 via a bearing 13, and the axis P1 of the horizontal axis 12 is Becomes In FIG. 1, the horizontal arm 45 is supported by the movable body 44 so as to be rotatable about the vertical axis P2.

A case in which tomographic imaging and general imaging are performed by the X-ray imaging apparatus having the above-described configuration will be described.

First, when used for tomography, the connecting rod 4 is inserted into the cylindrical portion 11 of the oscillating core shaft (fulcrum) 2 of the cutting plane setting unit 20, and as shown in FIG. After connecting the upper end and the horizontal arm 45 of the floor traveling X-ray tube holder 40 with a connecting bar 55, and connecting the lower end of the connecting rod 4 and the cassette holder 34 with a connecting bar 56, the floor traveling X-ray tube is used. When the tube holder 40 is moved along the rail 41 by the rotation driving mechanism of the traveling carriage 42, the connecting rod 4 swings (rotates) about the axis P1 of the swing core shaft 2 and, accordingly, the horizontal arm. The X-ray tube 46 supported by 45 and the cassette holder 34 below the top of the imaging table 30 horizontally move in opposite directions about the axis P1. Since the focal point of the X-ray tube 46, the center of the film in the cassette holder 34, and the axis P1 of the connecting rod 4 are always on a straight line, the tomographic image of the subject on the table 32 is X-ray. X-rays emitted from the tube 46 are recorded on a film in the cassette holder 34.

As described above, upon tomographic imaging, the imaging table 3
The X-ray tube 46 supported by the floor traveling X-ray holder 40 is attached to the connecting rod 4 inserted into the cylindrical portion 11 of the oscillating core shaft 2 of the cutting section setting unit 20 arranged on the rear side of the X-ray tube. It is only necessary to connect the cassette holder 34 below the top plate of the imaging table 30, and it is not necessary to mount the cut surface setting unit on the imaging table as in a conventional apparatus of this type. In addition, the swing core shaft (fulcrum) 2
Since the cutting plane setting unit 20 having the above is fixedly installed on the floor F, it can have sufficient rigidity, so that the setting accuracy of the cutting plane can be improved, and the fulcrum does not move during tomography. A tomographic image with excellent image quality can be obtained.

On the other hand, when used for general photographing, the connecting rod 4 is connected to the connecting bar 56 of the cassette holder 34,
And / or connecting rod 4 and floor traveling X-ray tube holder 4
The mechanical connection between the cassette holder 34 of the imaging table 30 and the X-ray tube 46 held by the X-ray tube holder 40 on the floor is released by disengaging the connection with the horizontal arm 45 of FIG. When the X-ray tube holder 40 is rotated by the rotation driving mechanism of the traveling carriage 42 or the clutch of the rotation driving mechanism of the floor-traveling X-ray tube holder 40 is disengaged and manually moved along the rails 41, other than tomography. For general photography.

As described above, in general photographing, since the cut section setting unit 20 having the connecting rod 4 swinging about the cut section as a fulcrum is fixedly arranged on the floor F on the rear side of the photographing table 30, the cassette holding section is held. By releasing the connection between the connecting arm 4 and the horizontal arm 45 of the X-ray tube holder 40 traveling on the floor and / or the connecting rod 4, general photographing becomes possible. There is no need to remove the camera from the shooting table. Further, the cut plane setting unit 20 is fixedly arranged on the floor on the rear side of the imaging table 30, and the space on the top plate including the rear side of the imaging table 30 is open. The cutting section setting unit does not cause any trouble at the time of the positioning or the treatment in the step (1).

Further, the connection between the horizontal arm 45 of the X-ray tube holder 40 traveling on the floor and the setting holder 34 and the connecting rod 4 of the cut section setting unit 20 is released to form a fulcrum for defining the cut section. If the connecting rod 4 is held by the cylindrical body 11 of the swinging core shaft 2 and vertically supported on the floor F, a storage place for the connecting rod 4 is unnecessary, and the connecting rod 4 is attached to the swinging core shaft 2. Even if it is vertically supported, since the cut surface setting unit 20 that supports the connecting rod 4 is located behind the imaging table 30, the space behind the imaging table 3 is large, and positioning of a subject (patient), treatment, and the like are performed. Does not hinder.

Further, only the connection between the connecting rod 4 and the setting holder 34 is released, and the movement of the traveling X-ray tube holder 40 causes the connecting rod to be centered on the pivot shaft 2 serving as a fulcrum for defining the cut surface. Even if it is swung, since the cutting plane setting unit is located on the rear side of the imaging table, it does not hinder the positioning and treatment of the subject (patient). Furthermore, the movable support 3 is a fixed support 1
And the height of the oscillating core shaft 2 as a fulcrum that defines the cutting surface provided at the upper part of the movable support 3 when it is lowered to the lowest position can be set lower than the height of the top plate 32 of the imaging table 30. If
The space on the top board including the rear side of the imaging table 30 is further opened, and workability is improved in positioning the subject (patient), performing a treatment, and the like.

In the above embodiment, the X-ray tube holder is of the traveling type on the floor, but the X-ray tube holder may be of the ceiling traveling type or the ceiling floor traveling type. Further, in the embodiment, a horizontal table-top fixed type imaging table is used as the imaging table. However, the imaging table may be a top-down type imaging table such as a horizontal type or an upside down type.
In the case of using a table top elevation type shooting table, the cutting plane (cutting height) can be set by raising and lowering the top, so that the columns constituting the cutting plane setting unit are made up of a fixed column and a movable column as in the embodiment. It is not necessary to use an up-and-down type, but it is sufficient to use a fixed support standing upright from the floor and provide an oscillating core shaft as a fulcrum above the fixed support. In this case, it is advantageous to set the height of the fulcrum lower than the height at the time when the top plate is highest.

Further, in the embodiment, the movable column having a fulcrum with respect to the fixed column of the cut section setting unit is moved up and down by the screw and nut mechanism. However, it is moved up and down by another lifting mechanism such as a rack and pinion mechanism. Alternatively, it may be manually moved up and down.

[0031]

According to the X-ray imaging apparatus of the present invention, general imaging and tomographic imaging can be performed without the necessity of attaching / detaching the cutting plane setting unit to / from the imaging table. In addition, a cutting surface setting unit having a connecting rod that swings around the cutting surface as a fulcrum,
Since it is placed on the floor on the back side (back side) of the imaging table, the space on the top of the imaging table including the rear side of the imaging table can be widened during general imaging, so positioning of the subject (patient) The cutting section setting unit does not cause any obstacle during treatment or the like.

Further, the X-ray tube held by the traveling X-ray tube holder and the cassette holder at the lower part of the top of the imaging table are connected at the time of tomography, and a connecting rod unnecessary at the time of general imaging is cut out in a section setting unit. It is possible to vertically support the floor at the fulcrum, and a storage space for the connecting rod is not required. In addition, since the cutting plane setting unit having the fulcrum is installed on the floor, it is possible to have sufficient rigidity, and as a result, the setting accuracy of the cutting plane can be improved, and the fulcrum does not move during tomography. And a tomographic image with excellent image quality can be obtained.

[Brief description of the drawings]

FIG. 1 is a diagram showing a schematic configuration of an embodiment of an X-ray imaging apparatus according to the present invention.

FIG. 2 is a cross-sectional view illustrating a configuration of a cut surface setting unit according to the embodiment.

FIG. 3 is a diagram showing a schematic configuration of a conventional X-ray imaging apparatus in which an imaging table and a traveling X-ray tube holder are combined.

[Explanation of symbols]

 Reference numeral 20: Cut section setting unit 1 ... Fixed support 2 ... Swinging core shaft (fulcrum) 3 ... Movable support 4 ... Connecting rod 5,9 ... Bevel gear 6 ... Screw rod 13,7 ... Bearing 8 ... Motor 10 ... Nut 11 ... Cylindrical part 12 ... Horizontal axis 30: Photographing table 31 ... Base 32 ... Top plate 33 ... Top plate supporting frame 34 ... Cassette holder 40: Floor traveling type X-ray holder 41 ... Rail 42 ... Traveling carriage 43 ... Prop 44 ... Movable body 45 Horizontal arm 46 X-ray tube 56, 55: Connecting bar P1: Shaft center

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Toshiaki Nakamura 1 Nishinokyo Kuwaharacho, Nakagyo-ku, Kyoto Co., Ltd. Shimadzu Corporation (72) Inventor Kodai Takahama 1 Nishinokyo Kuwaharacho, Nakagyo-ku, Kyoto Co., Ltd. Shimadzu Corporation (72) Inventor Toshio Kadowaki 1 Nishinokyo Kuwabaracho, Nakagyo-ku, Kyoto City Inside Shimadzu Corporation (72) Inventor Hajime Takemoto 1 Nishinokyo Kuwabaracho, Nakagyo-ku Kyoto City Inside Shimadzu Corporation F-term (reference) 4C093 AA03 AA11 CA08 CA16 CA18 EC02 EC13 EC14 EC26 EC28 EC30 EC33 FA15 FA22 FA53 FA55

Claims (4)

[Claims] 1. A photographing table installed on a floor provided with a cassette holder that can be moved in a longitudinal direction below a top plate,
A traveling X-ray tube holder for holding the X-ray tube above the top plate so as to be movable in the longitudinal direction of the X-ray tube and the X-ray tube and the cassette holder, and swinging about a cut surface as a fulcrum. An X-ray imaging apparatus comprising a cutting plane setting unit having a connecting rod, wherein the cutting plane setting unit is arranged on a floor on a rear side of the imaging table. 2. The X-ray imaging apparatus according to claim 1, wherein the cut surface setting unit is a column having a fulcrum of the connecting rod in an upper part standing upright from a floor surface. Shooting equipment. 3. The X-ray imaging apparatus according to claim 1, wherein a fulcrum of the connecting rod provided on the column is movable up and down. 4. The X-ray imaging apparatus according to claim 1, wherein a fulcrum of the connecting rod provided on a column is lower than a height of a top plate of the imaging table. Shooting equipment.