JP3772705B2 - X-ray fluoroscopic equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an undertube type X-ray fluoroscopic apparatus in which an X-ray tube is provided on the back side of a top board, and in particular, performs normal fluoroscopic imaging using an imaging system provided on the top of the top board, On the other hand, the present invention relates to an X-ray fluoroscopic apparatus that performs long-distance imaging using another X-ray tube such as a ceiling suspension.
[0002]
[Prior art]
An X-ray fluoroscopic imaging device has an X-ray tube and an imaging device (image intensifier, TV camera, spot imaging device, etc.) that are placed opposite to the X-ray tube and the top plate. Alternatively, fluoroscopic imaging is performed by moving or rotating up and down, left and right, and back and forth.
On the other hand, the top plate is moved by the motor drive in the height direction and lateral direction of the subject independently of the rotation of the fluoroscopic imaging table, the X-ray tube, and the movement of the imaging device by the switch operation of the controller. can do.
As described above, the X-ray tube, the imaging device, and the top plate are relatively positioned with the subject interposed between them while rotating the fluoroscopic imaging table and observing the shadow of the subject's contrast medium on the monitor. It can be moved independently, and the region of interest of the subject can be positioned at the center of the imaging device.
Then, in one X-ray examination room or another X-ray examination room, a proximity operation type X-ray fluoroscopic imaging apparatus, a separate X-ray tube capable of performing chest imaging and the like, a separate reader imaging stand, There are clinics and hospitals with boards.
An undertube type X-ray fluoroscopic apparatus is generally used as a proximity operation type X-ray fluoroscopic apparatus. FIG. 3 shows an undertube type X-ray fluoroscopic apparatus. The top plate 12 slides in the longitudinal direction and the width direction on the base 2 of the fluoroscopic imaging table 1, the first X-ray tube device 3 is on the back side of the top plate 12, and the input surface 5 a is on the top of the top plate 12. Spot photographing device 5, I.I. I. 6. An imaging device including a TV camera 7 is provided to be supported by the support unit 4, and the first X-ray tube device 3 and the imaging device are connected by the support unit 4 and interlocked. In addition, when performing a bucky imaging using an X-ray imaging cassette (when the X-ray imaging is performed by moving the scattered radiation removing grid at a constant speed to remove the scattered radiation and erasing the grid pattern from the image), the guide channel 8 is used. Then, the imaging is performed using the second X-ray tube apparatus 10 suspended from the ceiling suspension support 11 by moving the Bucky imaging apparatus 9 having the input surface 9a on the top.
An operation unit is provided on or near the fluoroscopic imaging table 1 and the operator is located near the subject and operates the imaging device, etc., and the anxiety given to the subject that instructions can be easily given to the subject. Although there is little feeling and it is easy to position and press the part to be imaged, there is a demand for improvement in operability such as weight reduction of the movable video system in order to shorten the operation.
In addition, for photographing a skeletal system or the like, a Bucky imaging device 9 capable of performing Bucky imaging using an X-ray imaging cassette is provided on the back side of the top board, and is suspended from a separately mounted ceiling support 11. Simple imaging is performed by the traveling second X-ray tube device 10 or the like.
In addition, since it is necessary to secure the distance between the focus and the film as close as 2 m, chest radiography cannot be performed with the close-up fluoroscopic imaging table 1 and is suspended by a separately mounted ceiling suspension support 11. The second X-ray tube apparatus 10 and the like are separately provided by a reader imaging stand.
In order to make effective use of the equipment, the X-ray fluoroscopic apparatus of the above-mentioned proximity operation type, the second X-ray tube apparatus 10 for chest radiographing and the reader imaging table are provided in one X-ray examination room. There are cases where X-ray inspection is performed by time sharing.
[0003]
[Problems to be solved by the invention]
The conventional X-ray fluoroscopic apparatus is configured as described above. However, in the undertube type fluoroscopic imaging table 1, an imaging apparatus (image intensifier II.6, TV) The camera 7, the spot photographing device 5, etc.) are moved in the longitudinal direction of the top plate 12, and a cassette loaded with film is attached to the Bucky photographing device 9 provided at the bottom of the top plate 12, along the guide channel 8. The second X-ray tube device 10 suspended from the ceiling suspension support 11 is moved to the upper part of the imaging region, and is moved to the upper part of the imaging region. In order to prevent interference with the imaging device when photographing in combination with the second X-ray tube device 10 suspended on the ceiling support 11, the Bucky imaging device 9 independent of the imaging device is required in this way. There is a problem that the movement range of the second X-ray tube apparatus 10 suspended from the ceiling support 11 is greatly limited.
[0004]
The present invention has been made in view of such circumstances, and does not require a separate bucky radiographing apparatus, and is not limited in the movement range of the second X-ray tube apparatus suspended from the ceiling suspension supporter. An object is to provide a fluoroscopic imaging apparatus.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, an X-ray fluoroscopic apparatus of the present invention converts a X-ray transmission image of a subject and a top plate on which the subject can be placed and moved in the longitudinal direction into a digital image. A rotating shaft that holds an FPD that is a flat panel detector on one side, an elevating unit that holds the rotating shaft, and the elevating unit are movably held in a direction in which the FPD is closer to the top plate, In an X-ray fluoroscopic apparatus comprising: a holding unit that holds the first X-ray tube device facing the FPD; and a base that holds the top plate and the holding unit movably in a longitudinal direction of the top plate. A guide channel formed as a space for the FPD to move in the longitudinal direction of the top plate is provided between the top plate and the holding portion side of the base. Set at the top of the board The first X-ray tube apparatus is used to perform fluoroscopic imaging, and at the time of long-distance imaging, the top plate is moved in the longitudinal direction, the FPD is rotated 180 degrees around the rotation axis, and the back part of the top plate is moved by the elevating part. By moving the FPD in a direction parallel to the top plate, the FPD is set on the back side of the top plate, and fluoroscopic imaging is performed using another second X-ray tube device .
[0006]
The X-ray fluoroscopic apparatus of the present invention is configured as described above. An FPD as a flat panel detector and a first X-ray tube apparatus on the back side of the top plate opposite to the FPD as a flat panel detector are provided on the undertube type fluoroscopic imaging table. Place and hold the FPD on the rotating shaft, rotate it 180 degrees, move down in the support section by the elevating part that can move in the direction approaching the top plate, and move the top plate in the longitudinal direction The FPD can be moved to the back side of the top plate, and the FPD can be moved along the guide channel in a direction parallel to the top plate. With this mechanism, during normal imaging, the FPD is set on the top of the top plate, and imaging is performed using the first X-ray tube device. During long-distance imaging, the FPD is set on the back side of the top plate and supported from the ceiling or the like. Imaging can be performed using the second X-ray tube apparatus. Thereby, it is possible to perform imaging in a wide space without requiring a separate Bucky imaging device and without restricting the movement range of the second X-ray tube device suspended from the ceiling suspension support.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the X-ray fluoroscopic apparatus of the present invention will be described with reference to FIGS. 1A is a plan view of the X-ray fluoroscopic apparatus of the present invention, FIG. 1B is a front view, FIG. 1C is a side view, and FIG. 1D is a sectional view of a lifting mechanism of the FPD 15. FIG. 2 is a diagram illustrating a state in which long-distance imaging is performed by the second X-ray tube apparatus 10 suspended from the ceiling suspension support 11 using the FPD 15.
The X-ray fluoroscopic imaging apparatus includes an FPD 15 that is a flat panel detector that converts an X-ray image into a digital image on the subject side with the top 12 sandwiched therebetween, and a first X that is disposed opposite to the back side of the opposite top plate. The tube apparatus 3, the top plate 12 on which the subject can be moved and moved in the longitudinal direction, the rotary shaft 14 that holds the FPD 15 on one side and can be rotated by 180 degrees, the rotary shaft 14 is fixed, and the FPD 15 is Elevating part 13 that can move in a direction far and away from plate 12, support part 4a provided on the side surface of base 2 that guides and supports the elevating part 13, and top plate 12 is moved in the longitudinal direction to cause FPD 15 And the guide channel 8 that can move the FPD 15 in a direction parallel to the top plate 12 by rotating it 180 degrees around the rotary shaft 14 and moving it to the back side of the top plate 12 along the support portion 4a.
[0008]
This fluoroscopic imaging apparatus uses an FPD 15 that is a flat panel detector that converts an X-ray image into a digital image. During normal imaging, the FPD 15 is set on the top plate 12 and provided on the back side of the top plate 12. The first X-ray tube apparatus 3 is used to perform fluoroscopic imaging, and at the time of long-distance imaging, the FPD 15 rotates 180 degrees on the rotation shaft 14, the X-ray input surface 15 a is directed upward, and along the support portion 4 a. The elevating unit 13 is lowered, the FPD 15 is lowered to the height of the guide channel 8 on the back side of the top plate 12, and is moved in a direction parallel to the top plate 12 within the guide channel 8, so that the position below the imaging region of the subject is measured. Set to And the 2nd X-ray tube apparatus 10 suspended from the ceiling suspension supporter 11 is set in the upper position of the imaging | photography site | part of a subject, and imaging is performed.
[0009]
An FPD (Flat Panel Detector) 15 is an image pickup device for a semiconductor flat panel, and generally includes an X-ray conversion film that converts X-rays into light, a photodiode array arranged in a matrix immediately below the X-ray conversion film, and each photodiode array. Consists of connected switching elements. After X-ray irradiation, each switching element is turned ON sequentially to read out the signal charge stored in each pixel and form an X-ray image, and to be sensitive to radiation. It has a radiation sensor array consisting of a conversion film that directly outputs a charge signal corresponding to the incident dose, and switching elements are connected to electrodes arranged in a matrix immediately below it, and each switching element is turned on sequentially during irradiation. Then, there are two types of types that read out the signal charge accumulated in each pixel and form an X-ray image Either type can be applied to an image constituted by an OFF line with a built-in data storage device, or an image constituted by processing a signal at the FPD 15 and the ON line of the fluoroscopic imaging table. If the FPD 15 of the semiconductor flat panel is used in place of the cassette without using a film and an intensifying screen, and the grid is similarly attached to the FPD 15, the same effect as the imaging device can be obtained.
[0010]
As shown in FIG. 1D, the elevating unit 13 holds the FPD 15 with the rotation shaft 14, the FPD 15 can be rotated 180 degrees on the rotation shaft 14, and the input surface 15 a of the FPD 15 is directed upward (or downward). The elevating part 13 slides up and down on the convex rails on both side surfaces of the support part 4 a provided on the side surface of the base 2 via the bearings 13 a provided on the elevating part 13.
The guide channel 8 is a channel that can move the FPD 15 parallel to the top plate 12 along the guide provided in the guide channel 8 when the FPD 15 is lowered to the height of the guide channel 8.
The second X-ray tube apparatus 10 is a device suspended from a ceiling suspension support 11 separately from the first X-ray tube apparatus 3 incorporated in the X-ray fluoroscopic apparatus, and the X-ray fluoroscopic apparatus is installed therein. This is for performing chest imaging using a separate reader imaging table or the like provided in the same room, and at the same time, imaging at a long distance using the FPD 15 of the X-ray fluoroscopic imaging apparatus.
[0011]
By incorporating a flat FPD 15 having a good photoconductive property in accordance with the irradiation intensity of X-rays and generating a charge signal into a conventional fluoroscopic imaging table, the whole is reduced in size, and an image intensifier Since it does not occupy a large space such as (I.I.) and is lightweight, the operability of the fluoroscopic imaging table is improved. Then, the FPD 15 is positioned above instead of the conventional spot photographing device, or the FPD 15 is moved downward instead of the bucky photographing device so that an image can be taken. When the FPD 15 is moved to the lower part of the top plate and the second X-ray tube device 10 is suspended from the ceiling, the conventional I.D. I. The second X-ray tube device 10 and the PD 15 can be set at the imaging position of the subject in a free space without being limited by the above, and long-distance imaging can be performed.
[0012]
Next, an operation procedure of the X-ray fluoroscopic apparatus will be described. When performing normal fluoroscopic imaging, first, the subject is placed on the top 12 and is fluoroscopically imaged using the FPD 15 set above the top 12 by the first X-ray tube device 3. Next, when performing long-distance imaging, the top plate 12 is moved to the left in the longitudinal direction. Then, the FPD 15 is rotated 180 degrees so that the input surface 15a faces upward. Then, the elevating unit 13 is manually lowered to place the FPD 15 in the guide channel 8 of the base 2. The top plate 12 is returned to the original position in the longitudinal direction. Then, the subject is placed on the top 12 and the FPD 15 is moved to a position below the imaging region. Then, the second X-ray tube device 10 suspended from the ceiling is positioned above the imaging region and imaging is performed. When performing a bucky radiographing operation (moving the scattered radiation removal grid at the same speed during radiography to remove the scattered radiation and erasing the lattice fringes from the image), the bucky radiographing mechanism is placed in front of the FPD 15 in the guide channel 8. Move or wear to take an image.
[0013]
In the above-described embodiment, the rotation of the FPD 15 on the rotating shaft 14 and the vertical movement of the elevating unit 13 are performed by manual operation. However, an electric drive system using a drive motor or a rack and pinion, or manual / It is good also as an electric switchable system.
[0014]
【The invention's effect】
The X-ray fluoroscopic apparatus of the present invention is configured as described above. An FPD as a flat panel detector is used on an undertube type fluoroscopic imaging table, and the FPD is held on a rotating shaft and rotated 360 degrees. Since the FPD can be moved along the direction parallel to the top plate by lowering the top plate, moving the top plate in the longitudinal direction, moving the FPD to the back side of the top plate, At the time of imaging, the FPD is set on the top of the top board, and imaging is performed using the first X-ray tube device. At the time of long-distance imaging, the FPD is set on the back side of the top board and supported from the ceiling or the like. Imaging can be performed using the apparatus. There is no need for a separate Bucky imaging device as in the prior art, and the second X-ray tube device suspended from the ceiling and the FPD are used to widen the space in which the second X-ray tube device can be moved and is limited to the imaging device as in the prior art. The imaging can be performed without any problem.
[Brief description of the drawings]
FIG. 1 is a diagram showing an embodiment of an X-ray fluoroscopic apparatus according to the present invention.
FIG. 2 is a diagram showing an imaging technique using a second X-ray tube device of the X-ray fluoroscopic imaging apparatus of the present invention.
FIG. 3 is a diagram showing a conventional X-ray fluoroscopic apparatus.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Perspective imaging | photography stand 2 ... Base 3 ... 1st X-ray tube apparatus 4, 4a ... Support part 5 ... Spot imaging | photography apparatus 5a, 9a, 15a ... Input surface 6 ... I. I.
7 ... TV camera 8 ... Guide channel 9 ... Bucky imaging device 10 ... Second X-ray tube device 11 ... Ceiling suspension support 12 ... Top plate 13 ... Lifting part 13a ... Bearing 14 ... Rotating shaft 15 ... FPD

Claims (1)

A top plate on which a subject can be placed and moved in the longitudinal direction, a rotary shaft that holds an FPD that is a flat panel detector that converts an X-ray transmission image of the subject into a digital image on one side, and the rotation An elevating unit that holds an axis; a holding unit that holds the elevating unit so that the FPD can move in a direction away from the top plate; and that holds the first X-ray tube device facing the FPD; In an X-ray fluoroscopic apparatus having a base that holds the top plate and the holding portion so as to be movable in a longitudinal direction of the top plate, the top plate and the holding portion side of the base, A guide channel is formed as a space for the FPD to move in the longitudinal direction of the top plate. During normal imaging, the FPD is set on the top of the top plate, and fluoroscopic imaging is performed using the first X-ray tube device. At long distance imaging Moves the top plate in the longitudinal direction, rotates the FPD 180 degrees around the rotation shaft, moves the FPD to the back side of the top plate by the elevating unit, and moves the FPD in a direction parallel to the top plate. The X-ray fluoroscopic imaging apparatus is characterized in that the FPD is set on the back side of the top board and fluoroscopic imaging is performed using another second X-ray tube apparatus.

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