JP4402771B2 - X-ray fluoroscopy table - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a medical bed apparatus such as an X-ray fluoroscopic apparatus for taking a gastrointestinal tract, for example, and in particular, an optical for retracting a light receiving system housing for receiving X-rays located under a top plate of the medical bed apparatus. The present invention relates to a system enclosure retraction device.
[0002]
[Prior art]
A conventional medical couch device has a schematic configuration as shown in FIG. A subject 100 lying on the bed 20 on the top plate 30 is irradiated with X-rays from the tube 10 at the top, and the transmitted light is transmitted to an image intensifier (II) and a TV camera. The optical system housing 1 integrated with the optical system adapter receives light to obtain a fluoroscopic image of the subject 100. At this time, the optical system housing 1 can be moved up and down as necessary to perform photographing.
[0003]
Moreover, the top plate 30 moves up and down in the direction of the arrow in the figure, and when the subject 100 gets on and off, the top plate 30 is lowered to make it easy to get on and off. However, if the top plate 30 is lowered too much, the optical system casing 1 hits the floor. Then, if the optical system housing | casing 1 is laid down and retracted, the top plate 30 can be further lowered as is well known, and convenience during getting on and off can be improved.
[0004]
[Problems to be solved by the invention]
As described above, in order to improve the convenience of getting on and off the subject and to further lower the top plate 30, as a conventional method of retracting the optical system housing 1, (1) Utility Model Registration No. 2034394 When a certain tilting axis and the revolving rotational axis of the optical system housing 1 are parallel, (2) when the link mechanism of Patent Registration 1972687 is provided, (3) the optical system housing 1 simply moves inside the spot. It may move up and down.
[0005]
However, when the tilting shaft of (1) and the revolving rotational axis of the optical system housing 1 are parallel, depending on the position and size (length) of the optical system housing 1, the optical system housing 1 When retracting, the position where the top plate and the optical system housing 1 interfere with each other occurs, and there is a problem that the retractable position is limited.
[0006]
Further, when the retracting mechanism for the optical system housing 1 by the link mechanism (2) is provided, there is a problem in the reproducibility of positioning of the optical system housing 1 due to the mechanical backlash of the link mechanism. In (3), since the optical system housing 1 is held only by the arm shaft, there is a problem that the rigidity of the arm shaft is required and the mechanism is enlarged.
[0007]
Further, when the optical system casing 1 is retracted only by vertical movement, the I.V. I. There is a problem that the height of the top plate 30 is limited by the combination of the length of the + TV camera and the optical system adapter.
[0008]
Further, in the conventional retracting device for the optical system housing, two motors are usually required to perform both the vertical movement and the rotational retracting of the optical system housing, which increases the cost and the size of the device. There was a problem of becoming.
[0009]
Further, in the getting-on / off mode of the subject 100, each operation such as retraction of the optical system housing 1, up-and-down movement of the top panel 30, up-and-down movement of the optical system chassis 1, and left-right movement of the top panel 30 is operated separately. Therefore, there is a problem that the optimal position for getting on and off the subject 100 has to be set, and the operation is complicated and difficult to handle.
[0010]
In addition, when the subject 100 gets on and off the top plate 30, the top plate 30 is lowered, but the optical system housing 1 is erected in a direction perpendicular to the back surface of the top plate 30, so that it is sufficiently low. The top plate 30 could not be lowered to the position.
[0011]
Further, the vertical movement of the optical system housing 1 with respect to the top plate 30 in the vertical direction with respect to the top plate 30 is performed at the time of photographing, so that operations for expanding the observation field of view and reducing the exposure dose have not been performed.
[0012]
The present invention has been made to solve the conventional problems as described above, and the object of the present invention is to realize the minimum height of the top plate at any position of the optical system casing, and to repeat the operation of the optical system casing. Excellent reproducibility,
In addition, it is easy to get on and off by sufficiently lowering the height of the bed, and the observation field can be expanded by moving the optical housing vertically to the bed, and the exposure dose of the subject can also be reduced. It is also possible to provide a compact optical system housing retracting apparatus that can improve the operability of the apparatus.
[0013]
[Means for Solving the Problems]
In order to achieve the above object, the invention according to claim 1 is characterized in that an attachment frame attached to an optical system housing disposed on a back surface of a top plate on which a subject is placed, and a surface of the attachment frame. A rotating spindle that is erected on the surface of the mounting frame, an arm shaft that is erected on a surface of the mounting frame at a predetermined position with respect to the rotating spindle, and that rotatably supports the rotating spindle and the optical system housing The optical system housing is lowered with respect to the top plate, rotated and retracted by moving the support member that slides in the longitudinal direction and the arm shaft so as to draw a U- shaped path , and then further lifted And an arm shaft driving mechanism having a function of placing the optical system casing in a space formed under the top plate .
[0016]
According to the first aspect of the present invention, the arm shaft is erected at a predetermined position with respect to the rotation spindle that is erected on the surface of the mounting frame that is attached to the optical system casing, and the rotation spindle is When the arm shaft is moved so as to draw a U-shaped path after being pivotally supported on a vertically movable support member, the optical system casing moves up and down in the longitudinal direction together with the support member. Only the optical system casing rotates about the rotation main axis. Therefore, the optical system housing is initially retracted by descending in the longitudinal direction and then laying on its side, and further, the arm shaft is retracted by moving the U-shaped portion of the J-shaped extension. You can raise your body up a little and put it in the space under the top board.
[0024]
In the present invention described in claim 3, to the first aspect of the invention, the film photographing position the film conveying into a film the film photographing position after shooting between said top plate and said optical system housing And a film conveying means for unloading the light from the film and a light shielding means for shielding light so that the film is not exposed to light, and the arm shaft driving mechanism is configured such that the optical system casing cannot convey the film. It is possible to approach the top plate up to a certain position as a solving means.
[0027]
According to the solution of the third aspect, it is easy to get on and off by sufficiently lowering the height of the bed, and the observation visual field can be enlarged by moving the optical system case in the vertical direction to the bed. It is possible to provide an X-ray fluoroscopic imaging table that can reduce the exposure dose of the subject.
[0028]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is an exploded perspective view showing an embodiment of a retracting device for an optical housing of the present invention. An optical system housing (video system) 1 has a plate-like mounting frame 2 fixed to its outer peripheral surface. A rotary main shaft 21 is erected on the surface of the mounting frame 2, and an arm shaft 22 is erected at a predetermined position with respect to the rotary main shaft 21 on the same surface.
[0029]
The rotation main shaft 21 is rotatably supported by a bearing 31 that is opened in a vertically moving frame 3 having a box structure. The vertically moving frame 3 is connected to a linear guide 5 fixed to a base (not shown) so as to be vertically movable.
[0030]
The vertically moving frame 3 has a notch 32 as shown in the figure, and the arm shaft 22 is slidably engaged with the U-shaped groove 41 of the U-shaped groove guide plate 4 by the roller 221 through the notched part 32. ing. The linear guide 5 is fixed to a base (not shown).
[0031]
The head portion of the arm shaft 22 that protrudes outward from the U-shaped groove 41 of the U-shaped groove guide plate 4 is slidably engaged with a portion of the groove 61 that is opened in the radial direction of the gear 6. Engage with the drive gear 7.
[0032]
Next, the operation of the present embodiment will be described. The drive gear 7 is directly connected to a single motor (not shown), and when the drive gear 7 rotates, the gear 6 rotates, whereby the head of the arm shaft 22 rotates along with the rotation of the gear 6 and the U-shaped groove guide plate 4. It moves along the U-shaped groove 41.
[0033]
For example, when the arm shaft 22 is on the left side of the U-shaped groove 41 in the drawing and is moving upward or downward, the mounting frame 2 is moved upward or downward, and the optical system housing 1 is in its longitudinal direction. The image intensifier (II) constituting the optical system housing 1 is positioned with respect to a top plate (not shown).
[0034]
Next, when the arm shaft 22 is in the U-shaped groove 41 on the lower side in the drawing and the arm shaft 22 is moving in the right direction from the left end portion, the optical system housing 1 falls to the left side, and further As the U-shaped groove 41 on the right side is raised, it gradually becomes horizontal. Furthermore, when the arm shaft 22 moves up the U-shaped groove 41 on the right side, the optical system casing 1 moves up while remaining almost horizontal, and the arm shaft 22 is located at a predetermined stop position of the right U-shaped groove 41. The rise stops when you come to.
[0035]
It should be noted that after the optical system housing 1 is retracted in a substantially horizontal state, it may be raised further upward depending on the type of video system in the optical system housing 1 after the optical system housing 1 is retracted. This is because the space that can be formed directly under the plate may be too large, and the optical system housing 1 that is horizontal in this space is accommodated.
[0036]
Next, auto positioning in the getting-on / off mode will be described. By pressing a boarding / exiting mode button (not shown), the top plate moves to a position where the optical system housing 1 can be retracted, and at the same time, the optical system housing 1 moves the arm shaft 22 along the U-shaped groove 41. This makes it possible to move to any position.
[0037]
In this case, when the subject is transferred from the stretcher, the optical system housing 1 can be set at the center position, and when changing from the wheelchair, an arbitrary position such as the head side end can be set. Then, after retracting the optical system housing 1, the top plate moves to the lowest position. By the left-right movement of the top board, the top board automatically moves to the doctor side where the subject can be transferred most easily.
[0038]
According to the present embodiment, by moving the arm shaft 22 along the U-shaped groove 41, the optical system housing 1 can be rotated and retracted in a direction perpendicular to the tilting shaft 50, and the optical system housing 1 is It is possible to realize a minimum top plate height where the height of the top plate is low at any position parallel to the tilting shaft 50.
[0039]
In addition, since the reproducibility of positioning of the optical system housing 1 depends on the machining accuracy of the U-shaped groove 41, the reproducibility can be made extremely high without being affected by play.
[0040]
Further, since the vertical movement frame 3 is box-shaped, a high rigidity can be obtained. Since the optical system casing 1 can be moved up and down and rotated in a series, the retraction operation can be performed for any combination of the video systems constituting the optical system casing 1, and the top plate has a low height. The height of the top plate can be realized, and the I.I. I. The part can penetrate into the spot, and the magnification of the fluoroscopic image can be changed when the subject is fluoroscopic. I. The exposure dose of the subject can be reduced by moving the portion closer to the tube portion and reducing the X-ray irradiation amount accordingly.
[0041]
Furthermore, by driving one motor, the arm shaft 22 can be moved along the U-shaped groove 41, and the above-described series of operations can be performed, and the entry / exit mode operation can be performed with one button. The operability of the apparatus can be improved. Furthermore, with a single motor, the optical system housing 1 can perform a series of operations such as vertical movement and rotational movement, and the drive mechanism can be reduced in size and made inexpensive.
[0042]
By the way, in the said embodiment, although the arm axis | shaft 22 was moved along the U-shaped groove 41, even if it moved along the J-shaped groove, the operation | movement substantially the same as the case of a U-shaped groove is performed, and the same effective. However, when this J-shaped groove is used, after the optical system housing 1 is rotated and retracted in the horizontal direction, the optical system housing 1 is raised to a space that is vacant between the top plate and the optical system housing 1. The function to pay is lost.
[0043]
3 and 4 are schematic views for explaining the operation of the optical system casing in the embodiment of the present invention.
[0044]
In FIG. 3A, the subject 100 is lying on the top plate 30 of the bed 20. In order for the subject 100 to get on and off the top board 30 in this state, a good boarding and getting-off property can be obtained if the height of the top board 30 from the floor surface is set sufficiently low. In general, the space on the back surface of the top plate 30 is provided with a speed-copying device 15 in which a film cassette 11 is accommodated. The film cassette 11 contains an X-ray photosensitive film 12 therein, and the X-ray photosensitive film 12 is disposed between the subject 100 and the optical system housing 1 at the time of photographing.
[0045]
At the time of film photographing, the optical system casing 1 is arranged perpendicular to the back surface of the top board 30, and the X-ray photosensitive film 12 is exposed to X-rays transmitted through the imaging target region of the subject 100. At the same time, the picked-up image is displayed on the optical system housing 1 by a monitor device (not shown).
[0046]
At the time of film shooting, the operator first presses a shooting button (not shown). The control means includes I.I. I. The position of I. is confirmed. I. When is lowered, each unit is controlled so that film shooting is performed. Specifically, a signal is sent to the rapid-motion device 15 to move the film 12 to the shooting position and stop the film 12 at the shooting position, and then X-rays are emitted from the X-ray tube S to perform film shooting and shooting. The subsequent film 12 is retracted from the photographing position and stored in a predetermined storage location. When the shooting button is pressed, the I.D. I. When I is raised, I. is displayed on the operation screen. I. Display a message to shoot after lowering the position.
[0047]
In the above example, I. When the shooting button is pressed while is raised, I. Although a message indicating that shooting is to be performed after the position is lowered is displayed, when the shooting button is pressed, the I.D. I. The film is shot with the position of the position lowered, and after film shooting is completed, I. I. Control may be performed to automatically return the position to the upper position.
[0048]
4A and 4B, the optical system casing 1 can be moved up and down in the vertical direction with respect to the back surface of the top plate 30 during photographing. I. with optical system housing 1 I. As an instruction means for moving the camera up and down, for example, an I.D. I. Up and down buttons are provided. Depending on the intention of the operator, I. When the upper button is pressed, the control circuit drives the motor to I. Is moved upward to approach the top plate and stopped at a predetermined position. I. I. When the down button is pressed, the control circuit drives the motor to I. Move down to move away from the bed and stop at a predetermined position.
[0049]
I. I. Is close to the top board 30, I. The position of the imaging surface is configured to be substantially the same as the position of the film 12 at the time of film shooting. In this state, I.I. I. Is positioned on the transport path of the film 12, so that the film 12 cannot be carried into the film photographing position.
[0050]
At this time, when a fluoroscopic button (not shown) is pressed by the operator, the control circuit I. Each unit is controlled so that fluoroscopic imaging is performed at a position where is stopped. Specifically, X-rays for fluoroscopic imaging are exposed from the X-ray tube S. I. I. Converts the X-ray image transmitted through the subject to an optical screen at this time. I. I. The TV camera connected to the camera captures this optical image and outputs it as an electrical moving image signal. The moving image signal is processed by an image processing circuit (not shown) and then displayed as a moving image on an image display means such as a monitor.
[0051]
For example, in the state of (a), the state is closest to the top plate 30. In this state, a wide observation field of view can be taken. Further, an enlarged observation field of view can be obtained by separating from the top plate 30 as shown in FIG. Furthermore, as shown in (a) above, by bringing the optical system housing 1 close to the subject 100, good imaging can be performed even if the exposure dose of X-rays is small.
[0052]
Note that a light shielding plate 16 is provided at a portion where the optical system housing 1 of the rapid photographing device 15 enters by vertical movement. The light shielding plate 16 is fixed to the casing of the rapid-shooting device 15 via a telescopic light shielding bellows 17. The light-shielding bellows 17 and the light-shielding plate 16 allow the I.D. I. Even if it moves up and down, it prevents light from entering from the outside. In addition, due to the expansion and contraction of the light-shielding bellows 17, I.V. I. It does not affect the vertical movement of.
[0053]
Referring to FIG. 3B, when the subject 100 gets on and off the top plate 30 without taking an image, the optical system housing 1 has the top plate as shown in FIG. From the posture perpendicular to 30, it rotates to a state parallel to the back surface of the top plate 30 in (b). As described above, the posture of the optical system housing 1 can be changed so that it falls down, so that the distance to the floor surface under the back surface of the top plate 30 can be reduced. Since the top plate 30 can be lowered sufficiently with respect to the floor surface, it is easy for the subject 100 to get on and off. This can provide good boarding / exiting ability even when the subject 100 is an elderly person or when it is difficult to physically get on and off.
[0054]
The above-described vertical movement of the optical system housing 1 relative to the bed and the overturning operation in the parallel direction are realized by controlling the trajectory by the U-shaped groove 41, the rotary spindle 21, and the arm 22 shown in FIG. Yes. Of course, by appropriately setting the shape of the U-shaped groove 41 according to the design intent, the movement amount in the vertical direction of the optical housing 1 and the movement locus during the overturning operation can be freely set.
[0055]
The embodiment described above is described in order to facilitate understanding of the present invention, and is not described in order to limit the present invention. Therefore, each element disclosed in the above embodiment includes all design changes and equivalents belonging to the technical scope of the present invention.
[0056]
【The invention's effect】
As described above in detail, according to the retracting device for the optical system casing of the present invention, it is possible to obtain the minimum board height at any position of the optical system casing, so that it is possible to obtain a good boarding / exiting property.
In addition, a wide observation field of view can be obtained by bringing the optical system casing closer to the subject, and a good image can be obtained with less X-ray exposure.
Further, the reproducibility of the repetitive operation of the optical system casing is excellent, and the operability of the apparatus can be improved.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view showing an embodiment of a retracting device for an optical system housing of the present invention.
FIG. 2 is a front view showing a schematic configuration example of a conventional medical bed apparatus.
FIGS. 3A and 3B are schematic views for explaining the operation of the optical system casing in the embodiment of the present invention. FIGS.
FIGS. 4A and 4B are schematic diagrams for explaining the operation of the optical system casing in the embodiment of the present invention. FIGS.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Optical system housing | casing, 2 ... Mounting frame, 3 ... Vertical motion frame, 4 ... U-shaped groove guide plate, 5 ... Linear guide, 6, 7 ... Gear, 21 ... Rotation main shaft, 22 ... Arm shaft, 31 ... Bearing 32 ... Notch portion, 41 ... U-shaped groove, 50 ... Sleeper tilting shaft, 61 ... Groove, 221 ... Roller

Claims (5)

A mounting frame attached to an optical housing disposed on the back surface of the top plate on which the subject is placed ;
A rotating spindle erected on the surface of the mounting frame;
An arm shaft erected at a predetermined position with respect to the rotation main shaft on the surface of the mounting frame;
A support member that rotatably supports the rotation main shaft and slides in a longitudinal direction of the optical system housing;
By moving the arm shaft so as to draw a U- shaped path, the optical system casing is lowered with respect to the top plate, rotated and retracted, and then further raised to lower the optical system casing to the top. An X-ray fluoroscopic imaging table, comprising: an arm shaft driving mechanism having a function of being stored in a space formed under a plate . The arm shaft drive mechanism includes a guide plate formed with a U-shaped groove for slidably locking the arm shaft;
A first gear for slidably locking a head of the arm shaft protruding from the U-shaped groove in a groove opened in a radial direction;
A second gear that is rotationally driven by one motor and rotates the first gear;
The X-ray fluoroscopic imaging table according to claim 1, comprising: A film transport means for transporting the film to a film photographing position between the top plate and the optical system housing, and unloading the film after photographing from the film photographing position;
A light shielding means for shielding light so that the film does not receive light,
The said arm axis | shaft drive mechanism makes the said optical system housing | casing close to the said top plate to the position where conveyance of the said film becomes impossible, The Claim 1 or 2 characterized by the above-mentioned. X-ray fluoroscopy table. The X-ray fluoroscopic imaging table according to claim 3 , wherein a part of the light shielding means is configured to expand and contract as the optical system casing approaches and separates . The said arm axis | shaft drive mechanism is comprised so that the said optical system housing | casing can adjoin to the said top plate until the said optical system housing | casing is located on the conveyance path | route of the said film . X-ray fluoroscopy table.

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