JP2003295370A - X-ray photographing apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an X-ray photographing apparatus which enables an X-ray photographed part of a patient and a film to be adjusted finely and speedily without moving the patient nor an X-ray tube device and has a small decrease in picture quality dur to scattered light. <P>SOLUTION: The X-ray photographing apparatus is equipped with a top plate upward/downward driving device 2 which adjusts the height of a top plate 1 from a floor surface by moving up and down the to plate 1 away from and to the floor surface, a top plate support base 3 which is provided at an upper edge of the top plate upward/downward driving device 2, the top plate 1 which is movable in directions X and Y over the top plate support base 3, a gap formed between the top plate 1 and top plate support base 3, a position- adjustable Bucky holder provided in the gap, a grid frame 17 which is provided between the Bucky holder and top plate and holds a grid in a frame, and an exciting means which vibrates a lid frame 17. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an X-ray photography apparatus, and more particularly to an X-ray photography apparatus using a grid.

[0002]

2. Description of the Related Art In an X-ray photography apparatus, an object and X
There is an imaging method in which a grid is arranged in front of the X-ray photographic film in order to avoid deterioration of image quality caused by scattered light caused by interaction with rays. The grid structure is X
The foil pieces having a large X-ray absorption and the foil pieces having a small X-ray absorption are alternately and accurately stacked. There are a method of using the grid structure in a stationary state during shooting, and a method of using the grid structure while vibrating the grid structure in shooting. The present invention relates to an X-ray photography apparatus belonging to the latter.

This type of X-ray photography apparatus moves the X-ray tube over the patient while keeping the patient lying on the tabletop,
The radiation is directed through the patient, the x-rays are placed under the patient, passed through a vibrated grid and exposed to film to image the affected area of the patient.

[0004]

Depending on the case, it may be desired to finely adjust the position of the patient lying on the top, but it is difficult to finely adjust the position of the patient who is heavy. There is also a method of finely adjusting the position by moving the X-ray tube arranged on the patient, but the weight of the X-ray tube device itself is heavy, and when the patient is gazing at the X-ray tube. Yes, if it takes time to move the X-ray tube, it may give the patient extra anxiety. In addition, there is a possibility that the image quality may deteriorate due to scattered light generated by the interaction between the subject and the X-ray.

Therefore, the present invention is intended to solve the above-mentioned inconvenience, and its object is to quickly position the X-ray photographing portion and the film of the patient without moving the patient or the X-ray tube device. It is an object of the present invention to provide an X-ray photography apparatus in which the deterioration of image quality due to scattered light that can be adjusted is small.

[0006]

In order to achieve the above-mentioned object of the present invention, the invention as set forth in claim 1 of the present invention is to place a human body on a top plate and use the X-ray to remove the human body. In an X-ray imaging apparatus for photographing, a table top / bottom drive device for adjusting the height from the floor surface by moving the table top / bottom from the floor surface, and a table top support base provided at the upper edge of the table top / bottom drive device A top plate that is movable in the X and Y directions on the top plate, a gap formed between the top plate and the top plate, and a bucky holding case that is provided in the gap and whose position is adjustable. There is provided an X-ray photography apparatus including a grid frame provided between the bucky holder and a top plate for holding a grid in the frame, and a vibrating means for vibrating the grid frame. According to a second aspect of the present invention, in addition to the invention according to the first aspect, the vibration means includes a vibration motor fixed to the bucky holder,
The X-ray photography apparatus according to claim 1, comprising an eccentric cam attached to the rotary shaft of the vibration motor, and a gap fitted to the eccentric cam and provided in the bucky holder. . According to a third aspect of the present invention, in addition to the invention according to the first aspect, an X-ray photography apparatus is characterized in that the X-ray tube is photographed near the center of the vibration width. provide.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION Next, an embodiment of the present invention will be described.
This will be described in detail with reference to the drawings. FIG. 1 shows an X according to the present invention.
It is a front view which shows a radiography apparatus, and FIG. 2 is the top view. In these drawings, 1 is a top plate on which a supine patient is placed. Reference numeral 2 denotes a top / bottom drive device which is arranged below the top board 1 and moves the top / bottom up and down. Reference numeral 3 denotes a top support base provided at the upper end of the top / bottom drive unit 2.
Reference numeral 4 denotes a base portion provided in a lower portion of the top-plate vertical drive device 2.
The base 4 is provided on the lower surface of the top-and-bottom drive device 2, and is placed on the floor surface 6 by the up-and-down adjusting screw 5 provided on the lower surface of the top-and-bottom drive device 2, and supports the entire imaging apparatus of the present invention.

A well-known pantograph-shaped vertical drive device 7 is provided between the lower surface of the top plate support 3 and the upper portion of the base 4. However, since it is outside the scope of the present invention, the description thereof will be omitted. Omit it.

On the top plate support base 3, a top plate carrier 8 is XY.
Direction, that is, horizontally movable.
Here, the longitudinal direction of the top plate 1 is defined as the X direction, the horizontal direction orthogonal thereto is defined as the Y direction, and the direction in which the top plate 1 moves up and down is defined as the Z direction. Although not shown in the drawing, two rails are laid in parallel in the X direction on the top plate support 3. Wheels are rotatably provided on the rails, and the wheels are supported by a frame. Further, two rails are laid in parallel on the frame body in the Y direction.
Wheels are rotatably provided on the rails, and the wheels are supported by a top plate support frame 9 shown in FIG. Therefore, the top plate support frame 9 can freely move in the X and Y directions, but since this structure is well known and is outside the scope of the present invention, detailed description thereof will be omitted.

A circular rail 10 is attached to a side portion of the top plate support frame 9 formed in an arc shape. Wheels 11 are rotatably provided on the rails 10, and the wheels 11 are rotatably supported by the top plate 1. Therefore, the top plate 1 can freely rotate about 90 degrees in the horizontal direction along the rail 10 on the top plate support frame.

A bucky holder 13 for removably accommodating a bucky 12 containing an X-ray film is attached to a gap between the bottom surface of the top plate 1 and the top plate support 3.

A brake 14 is attached to the lower surface of the top plate 1 at the side end of the bucky holder 13. The brake 14 is a motion-free type brake. That is, when the brake is not operating, the brake shoe 15 projects and comes into contact with the upper surface of the top plate carrier 8 to stop the rotation of the top plate 1, and when the brake force is exerted, the break shoe 15 is recessed and the top plate 1 rotates. become able to.

As shown in FIG. 3, a grid frame 17 is provided inside the bucky holder 13 via four leaf springs 16.
Is attached so that it can vibrate freely. Bucky holder 13
A vibration motor 18 is attached to the upper side of the. An eccentric cam 19 is attached to the rotary shaft of the vibration motor 18. The eccentric cam 19 is fitted in a groove 20 provided in the grid frame 17. Therefore, when the eccentric motor 19 rotates, the grid frame 17 vibrates in the swinging direction shown in FIG.

Below the grid frame 17 is a cassette storage section 21 for detachably storing a cassette containing a film.
Is provided. The cassette storage portion 21 is fixed and does not vibrate like the grid frame 17.

Next, the vibration position of the grid and the timing of X-ray imaging will be described. As described above, the grid frame 17 provided with the grid at the center vibrates as shown by the dotted line in FIG. 6 by the rotation of the vibration motor 18. In part A or part B, the grid frame 17 is located at one of the extreme positions of vibration, that is, the vibration speed is in the region of deceleration or acceleration. Therefore, the timing for irradiating the patient with X-rays is preferably a portion excluding the A or B region. In particular, it is preferable to be performed near the center of the vibration width in which the grid vibrates. Therefore, in the present invention, an enable circuit is provided so that the X-ray tube can be turned on in a portion excluding the area A or the area B by using an optical sensor.

Although the present invention has been described with reference to the above embodiments, various modifications and applications are possible within the scope of the gist of the present invention, and these modifications and applications are not excluded from the scope of the present invention. .

[0017]

As described in detail above, the present invention is
A table top / bottom drive device for moving the table top / bottom from the floor surface to adjust the height from the floor surface, a table top support base provided at an upper edge of the table top / bottom drive device, and an X on the table base support base. And a Y-direction movable top plate, a gap formed between the top plate and the top support, a positionally adjustable bucky holding case, and a space between the bucky holding case and the top plate. Since it is equipped with a grid frame for holding the grid in the frame and a vibrating means for vibrating the lid frame, the patient can be moved while being placed on the top plate, and the film The position of the loaded cassette can be finely adjusted. In addition,
Since the vibrating grid is arranged on the front surface of the film, the photosensitive film has many effects of the invention such as no deterioration of the image quality due to scattered light.

[Brief description of drawings]

FIG. 1 is a front view of an X-ray photography apparatus according to the present invention.

FIG. 2 is a plan view of an X-ray photography apparatus according to the present invention.

FIG. 3 is a front view showing a grid frame.

FIG. 4 is a side view showing a grid frame.

FIG. 5 is another side view showing a grid frame.

FIG. 6 is an explanatory diagram illustrating vibration of a grid frame.

[Explanation of symbols]

1 ... Top plate 2 ・ ・ ・ Top / bottom drive 3 ... Top plate support 4 ... Base 5 ... Vertical adjustment screw 6 ... Floor 7 ... Lower drive 8: Top plate carrier 9 ... Top plate support frame 10: Rail 11 ... Wheels 12: Bucky 13: Bucky holder 14 ... Brake 15: Break shoe 16 ... Leaf spring 17 ... Grid frame 18 ... Exciting motor 19 eccentric cam 20 ... Groove 21 ... Cassette storage

Continued front page    (72) Inventor Yasuaki Obayashi             1-7-10 Yushima Stock Exchange, Bunkyo-ku, Tokyo             Obayashi Manufacturing Company F-term (reference) 2H013 AA21 AA30                 4C093 AA30 CA07 CA36 EB04 EB26                       EC02 ED06 ED07 FA19 FA22                       FA43 FA54

Claims (3)

[Claims] 1. An X-ray photographing apparatus for placing a human body on a top plate and photographing the human body using X-rays. The top and bottom of the top plate for adjusting the height from the floor surface by moving the top plate up and down. Between the driving device, the top plate support provided at the upper edge of the top and bottom drive device, the top plate movable in the X direction and the Y direction on the top plate, and between the top plate and the top plate support. The formed gap, a positionally adjustable bucky holder provided in the gap, a grid frame provided between the bucky holder and the top plate for holding a grid in the frame, and a vibrating grid frame. An X-ray photography apparatus having a seismic means. 2. An oscillating means is provided on a bucky holder, which is fitted to the eccentric cam, an eccentric cam attached to a rotary shaft of the oscillating motor, and an oscillating motor fixed to the bucky holder. The X-ray photography apparatus according to claim 1, wherein the X-ray photography apparatus comprises: 3. The X-ray photography apparatus according to claim 1, wherein the X-ray tube is photographed near the center of the vibration width of the grid.