JP2001327484A - Radiography platform - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a radiography platform with which standing posture photographing and side photographing can be performed from a far distance without causing X-ray cutting off by means of a grid at the time of positioning an X-ray tube before photographing. SOLUTION: By erecting and tilting the radiography platform, a photographing system 16 is pulled out to this side from a photographing device 5 (a) which is provided under the top board 3 of the platform and has grid stripes 6 in the lengthwise direction of the top board 3 by means of a sliding mechanism 7 and set to a standing posture photographing position (b). Then the separately positioned X-ray tube 1 for photographing is prepared and the standing posture photographing is performed by localizing the tube 1 above or below the stripes 6. In addition, the photographing system 16 is set to a side photographing position (c) by pulling out the photographing device 5 (a) to this side around the A-axis 9 of the device 5 (a) and bending the device 5 (a) upward around the B-axis 10 of the device 5 (a). Then, side photographing is performed by localizing the X-ray tube 1 above or below the grid stripes 6.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an X-ray fluoroscopy table, and more particularly to an X-ray radiographing system using a radiographing system having a scattered radiation preventing grid consisting of a radiographing device provided below a top plate. It relates to a fluoroscopy table.

[0002]

2. Description of the Related Art In an X-ray examination room or another X-ray examination room, a proximity operation type X-ray fluoroscopy table, a separate X-ray tube capable of performing chest radiography and the like and a separate reader imaging are provided. There are clinics and hospitals equipped with a table, a tabletop and the like.

An under-tube type X-ray fluoroscopic table is generally used as a proximity operation type X-ray fluoroscopic table, and an operation unit is provided on the fluoroscopic table, and an operator is positioned near a subject. Then, an X-ray receiving system (e.g., a rapid shooting device, an II, a TV camera, etc.) is operated, and it is easy to give an instruction to the subject, and there is little anxiety given to the subject. Although positioning and compression are easy to perform, improvements in operability are required, such as a reduction in the weight of a movable video system to shorten the operation.

[0004] Further, for photographing a skeletal system or the like, a photographing mechanism capable of performing Bucky photographing using an X-ray photographing cassette is provided on the back side of the top plate where an X-ray tube is mounted. Simple X-ray tube is used for simple radiography. In addition, since it is necessary to ensure that the distance between the focus and the film is close to 2 m, chest radiography cannot be performed with a proximity operation type X-ray fluoroscopy table. It is done by a table.

[0005] In addition, when performing a side view of the subject due to the procedure of the examination, the subject must be placed on the top plate with the body sideways. However, in the case of a subject who cannot move, a side image may be taken with a separately provided X-ray tube and a top plate. Then, in order to effectively use the equipment, the above-mentioned proximity operation type X-ray fluoroscopy table, an X-ray tube for chest imaging and the like, a reader imaging table, and a top board are provided in one X-ray examination room, There are cases where X-ray inspection is performed by time sharing.

FIG. 6 shows an X-ray tube 1 provided separately or an X-ray tube 1 incorporated in the main body of the apparatus. 2 shows a state in which the person 13 is photographed. (A) shows a state in which normal front photographing is performed, and (b) shows a state in which side photographing is performed.

The photographing device 5 provided below the photographing table top 3 has an A-axis 9 having a rotation axis perpendicular to the photographing table top 3 at one corner, and the photographing table top 3 at one side thereof. A photographing apparatus holding mechanism provided with a B-axis 10 having a rotation axis parallel to the width direction of the photographing table, and mounted with a grid so that the longitudinal direction of the photographing table top plate 3 and the grid stripes 6 for removing scattered radiation coincide with each other. 12 and a cassette (not shown) in which a photographing film and an intensifying screen are set are mounted inside the photographing device holding mechanism 12.

[0008] In the case of (a) normal imaging, imaging is performed with the collimator 2 of the X-ray tube 1 facing the subject 13 with the imaging device 5 set on the back side of the imaging table top plate 3. Is done. At this time, since the longitudinal direction of the imaging table top 3 and the grid stripe 6 for removing scattered radiation coincide with each other, even if the X-ray tube 1 moves in the longitudinal direction of the imaging table top 3 to perform positioning,
X-ray cutoff by the grid stripes 6 does not occur.

When performing the side photographing shown in FIG.
Is located on the side surface of the subject 13 and turns the collimator 2 toward the side surface of the subject 13. Then, the photographing device 5 is rotated from the back side of the photographing table top 3 around the A-axis 9 and is taken out of the photographing table top 3. Then, the camera is rotated upward by 90 degrees about the B-axis 10, is set at the side surface photographing position 14, and the side surface photographing is performed. At this time, the grid stripe 6 is in a direction perpendicular to the body axis direction of the subject 13 and the X-ray tube 1
, The X-ray cutoff by the grid stripes 6 does not occur.

[0010]

The conventional X-ray fluoroscopic imaging table is configured as described above, and the imaging device 5 is provided on the back side of the imaging table top plate 3 and the imaging device holding mechanism 12 with a grid is provided. A cassette is attached and using a separate X-ray tube,
When a simple imaging of the subject 13 is performed, and when imaging in the horizontal direction is performed, the imaging device 5 is rotated about the A-axis 9 from the back side of the imaging table top 3, and the imaging table 5 is rotated. It is extended outward by 90 degrees about the B axis 10 and set at the side photographing position 14 to perform side photographing.

However, the photographing device holding mechanism 1 of the photographing device 5
The direction of the grid stripes 6 mounted on the imaging table 2 can be optimally arranged for the side surface imaging of the subject 13 on the imaging table top plate 3, but the fluoroscopic imaging table is pulled out by rotating. When the camera is set up and down in the vertical direction, which is necessary when the camera is turned upside down, the X-ray cone axis and the grid center are displaced, and an X-ray cutoff occurs, so that a normal X-ray photograph can be taken. There was a problem that I could not do it.

The present invention has been made in view of such circumstances, and when the X-ray tube is positioned in the vertical direction necessary for imaging, the displacement between the X-ray cone axis and the grid center is determined. Without the X-ray cutoff caused by the above, a normal front photographing of the subject 13 from the vertical direction, a side photographing of the subject 13 from the horizontal direction, and further, the fluoroscopic imaging table is turned upside down. It is an object of the present invention to provide an X-ray fluoroscopy table capable of performing normal standing imaging from a long distance.

[0013]

In order to achieve the above object, an X-ray fluoroscopy table according to the present invention comprises an X-ray tube on the subject side with a top plate interposed therebetween and an imaging device on the back side of the opposite top plate. Are arranged facing each other, and a grid is attached to the imaging system so that the longitudinal direction of the top plate and a grid stripe for removing scattered radiation coincide with each other, and an X-ray for capturing an X-ray transmission image of the subject with the imaging system In a fluoroscopy table, a rotation axis A provided at one corner of a holding device that holds a flat imaging system and perpendicular to the top plate, a rotation axis B that rotates around one side of the holding device, and two axes A , A slide mechanism that can pull out the photographing system set on the holding device that rotates around B, and the photographing system is set on the back side of the top plate during normal photographing. The shooting system is slid forward by the slide mechanism and positioned During shadow in which imaging system performs imaging by rotating 90 degrees upward by shooting system around a rotation to the B-axis 90 degrees to the front each imaging system around the A shaft is accommodated in the holding device.

The X-ray fluoroscopy table of the present invention is configured as described above, and is provided on the back side of the top plate, and the grid is mounted so that the longitudinal direction thereof and the grid stripes for removing scattered radiation coincide with each other. The photographing system, a rotation axis A provided at one corner of a holding device that holds the photographing system and perpendicular to the top plate, a rotation axis B that rotates about one side of the holding device as an axis, and pulling the photographing system forward. In the case of frontal photographing, the photographing system is set on the back side of the top plate, and in the case of side photographing, the photographing system rotates around the rotation axis A and is taken out. The X-ray tube is rotated around the center and positioned on the side of the subject, and in the upright position, the imaging system is slid forward and positioned to position the X-ray tube in the vertical direction necessary for imaging in all conditions. Even in the vertical direction, grid stripes Since it has to cut-off the X-ray is not generated due to the deviation between the X Senkirijiku and the grid center.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the X-ray fluoroscopic table of the present invention will be described with reference to FIG. FIG. 1 is a diagram showing a state in which the imaging apparatus of the X-ray fluoroscopic imaging table of the present invention is arranged at (a) a front imaging position, (b) an upright imaging position, and (c) a side imaging position. FIG. 2 is a view showing an imaging apparatus of the X-ray fluoroscopic table according to the present invention.

The X-ray fluoroscopic imaging table comprises an X-ray tube 1 having a collimator 2, an imaging table top plate 3 on which a subject is mounted, and an imaging device 5 provided below the imaging table top 3. The photographing device 5 includes a photographing device holding mechanism 4 and a photographing system 16. The photographing device holding mechanism 4 includes a guide rail 11, a turntable 8, an A-axis 9, and a B-axis 10.
It is composed of The photographing system 16 includes a grid, a cassette, a film, and an intensifying screen.

The photographing device holding mechanism 4 includes a turntable 8
Guide rails 11 are provided on both sides of the
6 can be pulled back and forth by the slide mechanism 7. The turntable 8 is provided with an A-axis 9 that rotates vertically at one corner, and the photographing device 5 can be rotated and taken out together with the turntable 8. Further, a B-axis 10 that rotates about one side of the photographing device holding mechanism 4 is provided, and the photographing device 5 can be rotated upward by 90 degrees and bent when the photographing device 5 is exposed outside.

The photographing system 16 is equipped with a grid for protecting X-ray scattered radiation so as to have grid stripes 6 in the longitudinal direction of the photographing table top, and a cassette in which a film and an intensifying screen are set is stored behind the grid. ing. Here, the film and the intensifying screen are used for the photographing system 16, but an image pickup device of a semiconductor flat panel may be used instead of this cassette.

On the other hand, a fluoroscopy table installed in the examination room,
The X-ray tube, which is separately mounted on the ceiling traveling suspension type, is installed and fixed so that the imaging center position of the apparatus and the X-ray tube position exactly match each other. The photographing by the photographing device 5 is performed as follows.

(A) When performing frontal photographing, as shown in FIG. 3, the X-ray tube 18 and the image receiving system 19 of the fluoroscopic photographing table 20 are moved toward the head or lower limbs, and the photographing device 5 performs photographing. It is located on the back side of the tabletop 3. Then, a separate X-ray tube 1 suspended from the ceiling traveling unit 17 in front of the subject, or
The X-ray tube of the main body of the fluoroscopic imaging table (at the time of an overtube type fluoroscopic imaging table) is set and positioned in the longitudinal direction of the imaging table top plate 3.

(B) At the time of standing photographing, as shown in FIG. 4, the X-ray fluoroscopic table 20 is turned upright and the slide mechanism 7 moves the photographing system 16 from the photographing device 5 to the near side. And set at a position beside the imaging table top 3. Then, the separately placed X-ray tube 1 suspended from the ceiling traveling unit 17
Is positioned vertically from a long distance.

(C) At the time of side photographing, as shown in FIG. 5, the photographing device 5 located on the back side of the photographing table top plate 3 is turned around the A axis 9 of the photographing device holding mechanism 4. The image capturing device 5 is rotated to the outside by 8 and then rotated upward by 90 degrees about the B axis 10 to position the imaging device 5 on the side of the subject. Then, the separately placed X-ray tube 1 suspended from the ceiling traveling unit 17 is set at a horizontal position on the side surface and positioned vertically.

In any of the above-mentioned states (a), (b) and (c), the grid stripes 6 mounted on the photographing system 16 have X
The X-ray coincides with the vertical positioning direction of the X-ray tube 1 and X-ray cut-off due to displacement between the X-ray cone axis and the grid center does not occur.

In the above-described embodiment, a film and an intensifying screen are used for the photographing system 16 as the photographing system 16, but a semiconductor flat panel image pickup device is used instead of this cassette. As an imaging device for a semiconductor flat panel, the imaging device is generally composed of an X-ray conversion film that converts X-rays into light, a photodiode array arranged immediately below the X-ray conversion film, and a switching element connected to each photodiode array, After the X-ray irradiation, by sequentially turning on each switching element, the signal charges stored in each pixel are read out to form an X-ray image. It has a radiation sensor array consisting of a conversion film that directly outputs, and switching elements are connected to electrodes arranged in a matrix immediately below the radiation sensor array, and each switching element is sequentially turned on at the time of irradiation, thereby accumulating in each pixel. There are two types of reading signal charges and forming an X-ray image.

Either type can be applied to a system in which a data storage device is built in and an image is formed by an OFF line, or a system in which a signal is transmitted by an imaging system 16 of a fluoroscopic imaging table and an ON line. The same effect can be achieved by using this semiconductor flat panel imaging device instead of a cassette without using a film and an intensifying screen and mounting a grid on the imaging system 16 in the same manner.

[0026]

The X-ray fluoroscopy table of the present invention is constructed as described above. An imaging apparatus having grid stripes in the longitudinal direction of the table under the top of the fluoroscopy table is provided by a slide type drawer mechanism. When it is pulled out to the front side of the tabletop and it is in the upright shooting position, the grid stripes are located in the up and down direction, and also rotate the imaging device with the slide pullout mechanism and pull it out to the front side of the tabletop, then bend and lift, When the camera is set to the side shooting position, grid stripes are positioned in the vertical direction.
Even if the X-ray tube is positioned in the vertical direction, since the grid stripes are positioned in the vertical direction, the X-ray does not cut off due to the displacement between the X-ray cone axis and the center of the grid.

Therefore, when long-distance imaging is required, frontal horizontal imaging and upright imaging such as chest imaging can be performed using another X-ray tube arranged at a long distance. Further, when imaging from the side of a subject or a skeletal system that cannot be moved is required, a side imaging can be performed using a separately provided X-ray tube. Therefore, by installing one X-ray fluoroscopic table, frontal photography, standing photography, and side photography from a long distance can be performed in combination with general fluoroscopic photography.
A clear X-ray image can be obtained without a cut-off of X-rays due to a shift between the line cone axis and the center of the grid, and the space of the examination room can be effectively used without requiring a large-scale apparatus.

[Brief description of the drawings]

FIG. 1 is a diagram showing an embodiment of an X-ray fluoroscopic imaging table according to the present invention.

FIG. 2 is a view showing an imaging device holding mechanism of the X-ray fluoroscopic imaging table of the present invention.

FIG. 3 is a view showing one embodiment of front imaging of the X-ray fluoroscopic table of the present invention.

FIG. 4 is a view showing one embodiment of the standing radiography of the X-ray fluoroscopic table of the present invention.

FIG. 5 is a view showing one embodiment of side photographing of the X-ray fluoroscopic imaging table of the present invention.

FIG. 6 is a view for explaining an operation of a photographing device holding mechanism of a conventional X-ray fluoroscopic table.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... X-ray tube 2 ... Collimator 3 ... Imaging stand top plate 4 ... Imaging device holding mechanism 5 ... Imaging device 6 ... Grid stripe 7 ... Slide mechanism 8 ... Turntable 9 ... A axis 10 ... B axis 11 ... Guide rail 12 ... Photographing holding mechanism 13 Subject 14 Side photographing position 15 Standing long distance photographing position 16 Photographing system 17 Ceiling traveling unit 18 X-ray tube 19 Image receiving system 20 Transparent radiographing table

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Koji Yoshida, inventor, Shimadzu Corporation, Nishinokyo Kuwahara-cho, Nakagyo-ku, Kyoto (72) Inventor Tadahiko Nakahara, Shimadzu Corporation, Shizuzu, Nishi-no-Kyowacho, Nakagyo-ku, Kyoto, Japan (72) 72) Inventor Masayasu Takase 1 Kuwabaracho, Nishinokyo, Nakagyo-ku, Kyoto, Japan Shimadzu Corporation (72) Inventor Takayoshi Okamura 1 Kuwaharacho, Nishinokyo-kuwa, Nakagyo-ku, Kyoto Japan Shimadzu Corporation, 72 (inventor) Shishikura ▲ Taku ▼ Jin 1 Nishinokyo Kuwabaracho, Nakagyo-ku, Kyoto F-term in Shimadzu Corporation (reference) 4C093 AA03 CA16 CA37 EA02 EC28 EC60

Claims (1)

[Claims] An X-ray tube is arranged on the subject side with the top plate interposed therebetween, and an imaging device is arranged opposite to the back side of the top plate on the opposite side, and the longitudinal direction of the top plate and scattered radiation are removed in the imaging system. The grid is mounted so that the grid stripes coincide with each other, and is provided at one corner of a holding device that holds a flat imaging system in an X-ray fluoroscopic imaging table that captures an X-ray transmission image of a subject with an imaging system. Pulling out a rotation axis A perpendicular to the top plate, a rotation axis B rotating about one side of the holding device as an axis, and an imaging system set on the holding device rotating around the two axes A and B. The shooting system is set on the back side of the top plate during normal shooting, the shooting system is slid forward by the slide mechanism during long distance shooting, and the shooting system is The photographing system is housed in the holding device and centered around the A axis. X-ray fluoroscopic imaging table, characterized by performing the front to rotate 90 degrees taken rotated 90 degrees each upward imaging system around the B axis.