JP2003199732A - X-ray equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To allow easy positioning of a radiographic center on a radiographic region without displacing a subject even where the radiographic region exists. <P>SOLUTION: This X-ray equipment comprises an examination table 15 on which the subject 17 is placed, a radiographic part 14 to be movably held on the lower face of a top plate 16 of the examination table 15 in the longitudinal direction, a mechanism of a motor 24 and a rack 25 and a pinion 26 for moving the radiographic part 14, a vessel part 11 mounted at the end of an expansion arm 21 movably in the longitudinal direction, a position detecting part to be operated by the mechanism of the rack 22 and the pinion 23, and a control part 27 for controlling the radiographic portion 14 to be moved corresponding to the detecting part so that the position of the radiographic part 14 accurately corresponds to the position of the vessel part 11 in accordance with a positional signal from the radiographic part 14. <P>COPYRIGHT: (C)2003,JPO

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an X-ray apparatus mainly used for medical treatment. 2. Description of the Related Art As shown in FIG.
An X-ray beam is emitted from a tube unit 11 including a ray tube and a collimator to the subject 17, and the X-ray beam transmitted through the subject 17 is incident on an imaging unit 14 such as an X-ray film. X-ray images. The subject 17 lies on the table 16 of the examination table 15 and lays down.
1 is attached to the tip of an arm 12 held on a support 13 so that an X-ray beam can be irradiated from above. Prop 1
Numeral 3 is adapted to be moved by wheels on rails set on the floor, in the longitudinal direction of the examination table 15 (height direction of the subject 17 lying thereon, a direction perpendicular to the plane of the paper in the figure). Move. Therefore, the positioning of the tube portion 11 to the desired imaging region of the subject 17 is performed by moving the support 13 in the longitudinal direction of the examination table 15. Positioning in the left-right direction of the drawing (short direction of the inspection table 15, since the operator stands on the left side of the drawing and operates on the right side, so that the operator is in the front-back direction, hereinafter referred to as the front-back direction), This is achieved by shifting the position of the subject 17 on the top 16 in the left-right direction (front-back direction) in the figure. [0003] However, in such a conventional X-ray imaging apparatus, there is a problem that a subject may be forced to exert an unreasonable posture depending on an imaging part. For example, in the case of the imaging part 18 as shown in FIG. 2, that is, when the left arm of the subject 17 is the imaging part, in order to position the imaging part 18 at the imaging center (the center line of the X-ray beam), The subject 17 needs to lie on the top plate 16 at a position greatly shifted to the right as shown by the two-dot chain line, and the subject 17 becomes leaning out of the top plate 16. In view of the above, the present invention has a simple configuration,
It is an object of the present invention to provide an X-ray imaging apparatus in which the imaging center can be easily positioned at the imaging site without shifting the position of the subject, regardless of the imaging site, not only in the longitudinal direction but also in the front-back direction. I do. [0005] In order to achieve the above object, an X-ray imaging apparatus according to the present invention comprises an examination table on which a subject is placed and an examination table beside the examination table. A column movably installed in the longitudinal direction, an arm extending from the column to the upper part of the examination table, an X-ray tube attached to the tip of the arm and irradiating an X-ray beam in the direction of the examination table;
A holding mechanism for holding the X-ray tube portion movably in a short direction of the inspection table, an imaging section arranged on the lower surface of the top plate of the inspection table so that X-rays are incident thereon; A holding mechanism that holds the X-ray tube unit and the imaging unit so as to be movable in the transverse direction, and an interlocking device that moves the other when the one of the X-ray tube unit and the imaging unit is moved in the transverse direction of the examination table. Is the feature. [0006] Since the X-ray tube is attached to an arm extending from a column installed movably in the longitudinal direction of the examination table, the X-ray beam can be positioned in the longitudinal direction of the examination table. In addition, since the X-ray beam is held so as to be movable in the short direction of the inspection table, the X-ray beam can be positioned in the short direction of the inspection table. Therefore, when the subject is to be placed on the inspection table top and X-ray imaging is to be performed, no matter where the part to be imaged is located, without moving the position of the subject on the top, The X-ray tube can be positioned so that the X-ray beam is irradiated on the imaging region. When the X-ray tube is moved in the short direction of the examination table, the imaging unit also moves in conjunction with the movement, so that the part to be imaged can be captured at the center of the imaging unit. Since it is not necessary to move the subject on the examination table top, the subject is not forced to take an unreasonable posture. It is necessary to have a configuration in which the X-ray tube unit and the imaging unit are movably held in the short direction of the imaging table and their movements are linked, but this can be realized with a relatively simple configuration. Next, an embodiment of the present invention will be described in detail with reference to the drawings. In FIG. 1, an inspection table 15 is for placing a subject 17 on a top plate 16. The tube unit 11 includes an X-ray tube, a collimator, and the like, and irradiates an X-ray beam toward a subject 17 on an examination table 15. The tube portion 11 is attached to a tip of an arm 21 extending from the column 13 to an upper portion of the inspection table 15. The support 13 is configured to be able to move in the longitudinal direction of the inspection table 15 by wheels on a rail installed on the floor. The arm 21 is of an extendable type. Here, a mechanism is used in which the inner cylinder expands and contracts by sliding in the outer cylinder. In addition, an appropriate mechanism such as a link mechanism is provided. Can also be adopted. The inner cylinder is provided with a rack 22 and meshes with a pinion 23 attached to the outer cylinder. The amount of expansion and contraction is converted into the amount of rotation of the pinion 23 and converted into an electric signal by a potentiometer (not shown) connected to the pinion 23. It is supposed to be. As a result, a signal indicating the position in the front-rear direction of the tube portion 11 is obtained and sent to the control unit 27 provided inside the support 13 or the like. On the other hand, on the lower surface of the top plate 16 of the inspection table 15,
An imaging unit 14 such as an X-ray film is provided. The imaging unit 14 is held by a slide mechanism or the like so as to be movable in the short direction (front-back direction) of the imaging table 15. Further, by the mechanism of the motor 24, the rack 25 and the pinion 26,
When the motor 24 is driven to rotate, the motor 24 is moved in the front-rear direction. The motor 24 is a control unit 27
And a potentiometer (not shown) is connected to the pinion 26 to detect the position of the photographing unit 14 and send a position signal to the control unit 27. When the tube unit 11 is manually moved in the front-rear direction, the control unit 27 drives the motor 24 in accordance with the detected position signal to move the photographing unit 14. Shooting unit 1
Since the position of No. 4 is detected and the position signal is returned to the control unit 27, the position of the photographing unit 14 can be controlled so as to accurately correspond to the position of the tube unit 11. For example, as shown by a shaded portion, a part 18 to be photographed is a subject 17 lying on a top 16.
Suppose that it was the left arm part of. In this case, the tube part 11 is manually pulled out to the near side without shifting the subject 17 on the top 16, and the X-ray beam center line is positioned so as to match the imaging part 18. Then, the position is detected and transmitted to the control unit 27, and the control unit 27 drives the motor 24. As described above, the imaging unit 14 is moved so as to accurately correspond to the position of the tube unit 11. Therefore, an image of the imaging region 18 can be obtained at the center of the imaging unit 14. Since this is always the same regardless of the position of the imaging part 18, the subject 17
There is no need to assume a position where it is likely to fall from the end of 5, or to take an unreasonable posture. Further, the operator does not need to perform the work of shifting the position of the subject 17, and only the position of the tube portion 11 can be freely determined, so that the operability of positioning is improved. Since the center of the imaging unit 14 is located at the center line of the X-ray beam, and the imaging region can be captured at the center of the image, an imaging error does not occur. The above description relates to one embodiment of the present invention, and it is a matter of course that the present invention is not intended to be limited to the above. For example, in the above description, the tube unit 11 can be manually moved back and forth, and the control unit 27 moves the photographing unit 14 back and forth in conjunction therewith. It is also possible to make it possible to move back and forth, and to make the control unit 27 move the tube part 11 back and forth in conjunction therewith. In addition, the specific configuration and the like can be variously changed without departing from the spirit of the present invention. As described above, according to the X-ray imaging apparatus of the present invention, if one of the tube section and the imaging section is manually moved, the other moves in conjunction therewith. The center line of the imaging unit and the center of the imaging unit can be always matched, preventing imaging errors, and moving the subject regardless of the position of the part to be imaged, Since only one of the photographing units needs to be manually moved, the operability is improved. Since the subject is not moved, the subject is not forced to take an unreasonable posture.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic front view showing an embodiment of the present invention with a part cut away. FIG. 2 is a schematic front view of a conventional example. [Description of Signs] 11 Tube section 12 Arm 13 Support 14 Imaging section 15 Inspection table 16 Top plate 17 Subject 18 Imaging section 21 Telescopic arm 22, 25 Rack 23, 26 Pinion 27 Control section

   ────────────────────────────────────────────────── ─── Continuation of front page    (72) Inventor Toshio Kadowaki             1 Nishinokyo Kuwabaracho, Nakagyo-ku, Kyoto, Kyoto             Shimadzu Corporation (72) Inventor Hajime Takemoto             1 Nishinokyo Kuwabaracho, Nakagyo-ku, Kyoto, Kyoto             Shimadzu Corporation F term (reference) 4C093 AA01 CA16 EC13 EC30 EC32                       FA15 FA22 FA43 FA54

Claims (1)

Claims: 1. An inspection table on which a subject is placed, a column installed beside the inspection table so as to be movable in the longitudinal direction of the inspection table, and an upper portion of the inspection table from the column. An extending arm, an X-ray tube unit attached to the tip of the arm and irradiating an X-ray beam in the direction of the inspection table, and a holding mechanism for holding the X-ray tube unit movably in the short direction of the inspection table. An imaging unit arranged so that X-rays are incident on a lower surface of a top plate of the inspection table;
A holding mechanism for holding the imaging unit movably in the short direction of the examination table; and an interlocking mechanism for moving one of the X-ray tube unit and the imaging unit in the short direction of the examination table when the other is moved in the short direction of the examination table. An X-ray imaging apparatus, comprising: an apparatus;