JP2005095509A - X-ray radiography device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an X-ray radiography device capable of photographing each part of the whole body of an examinee S surely and efficiently without using cassette photographing together. <P>SOLUTION: The X-ray radiography device irradiates X-rays from an irradiator 1 to the examinee S lying on the radiograph platform 2 and the image is received by the image receiver 3. The irradiator 1 is movably mounted in the lateral direction Y and the vertical direction X orthogonal to Y of the height of the examinee S lying on the radiograph platform 2, and is equipped with a position detector 12 to detect its position where it moves. The image receiver 3 is equipped with an image receiving device 30 to receive the X-rays irradiated from the irradiator 1 and the first and second moving means 31 and 32 to move the image receiver 30 in vertical or lateral direction of the radiograph couch, and a controller 4 to move the image receiver 30 to the opposite position of the irradiator 1 using the first and second moving means 31 and 32 based on the result of position detection detected by the position detector 12 of the irradiator 1. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an X-ray imaging apparatus that performs X-ray imaging of each part of a body of a subject on a supine position imaging table.

As this type of X-ray imaging apparatus, an X-ray imaging apparatus having an X-ray irradiation unit, an X-ray image receiving unit, and an imaging table on which a subject is lying down during X-ray imaging is known (see Patent Document 1).
JP 2002-17712 A

  However, in the conventional X-ray imaging apparatus, the top plate moving stroke in the height direction of the subject and in the right and left direction perpendicular thereto is small, and the parts away from the center of the human body such as the head, feet, right hand and left hand are X-rays. Since these did not reach within the irradiation, it was necessary to perform cassette imaging for these parts, and two different types of imaging systems were required.

  Therefore, an object of the present invention is to efficiently perform whole-body imaging of a subject using only this apparatus.

  In order to achieve the above object, the present invention provides an X-ray imaging apparatus that irradiates a subject lying on a radiography table with X-rays from an X-ray irradiation unit and receives the image on the image receiving unit. The line irradiation unit is disposed freely in the vertical direction in the height direction of the subject lying on the imaging table and in the horizontal direction perpendicular thereto, and includes a position detector that detects the movement position. The image receiving unit includes an image receiver that receives the X-rays from the X-ray irradiation unit, and first and second moving units that move the image receiver in the vertical and horizontal directions of the imaging table. A controller for moving the image receiver to a position facing the X-ray irradiation unit by first and second moving means of the image receiving unit based on a position detection result of the position detector of the X-ray irradiation unit; .

  When performing X-ray imaging of a subject who is lying on the imaging table, the X-ray irradiation unit is moved in a direction perpendicular to the height direction of the subject according to the imaging region. The imaging position of the X-ray irradiation unit is detected by a position detector, and the first and second moving means of the image receiving unit are driven by the output from the controller based on the position detection result, so that the receiver receives the X-ray irradiation. It is automatically moved to the position facing the part. By doing so, although the top plate area is slightly larger than that of the conventional X-ray imaging apparatus, imaging of each part of the whole body can be performed efficiently only with this apparatus, and the conventional cassette imaging becomes unnecessary. This leads to shortening of the shooting time, and furthermore, since the top plate does not slide, the installation area of the imaging table is only the imaging table area, and it can be installed in a much smaller room than the conventional one.

  In one embodiment of the present invention, the first and second moving means of the image receiving unit are set to move to the ends in the vertical and horizontal directions of the imaging table. According to this configuration, not only imaging with the subject placed on the imaging table, but X-ray imaging can be performed by placing the affected part of the subject on the top plate even when the subject is in the sitting position. . That is, imaging of each part of the whole body of the subject can be performed more reliably and efficiently with one X-ray imaging apparatus.

  According to the X-ray imaging apparatus of the present invention described above, it is possible to efficiently perform imaging of each part of the body of the subject.

Hereinafter, an X-ray imaging apparatus according to the present invention will be described with reference to the drawings.
FIG. 1 is a front view showing an embodiment of an X-ray imaging apparatus according to the present invention, and FIG. 2 is a longitudinal side view thereof. This X-ray imaging apparatus irradiates the subject S lying on the imaging table 2 with the X-rays from the X-ray irradiation unit 1 and receives the image on the image receiving unit 3.

  The X-ray irradiator 1 includes an X-ray tube and an X-ray diaphragm (collimator) 11, and the X-ray diaphragm 11 has a longitudinal direction X in the height direction of the subject S lying on the imaging table 2. A position detector 12 for detecting an imaging position is attached to the end of the X- and Y-direction moving range of the X-ray irradiation unit. As the position detector 12, for example, a potentiometer, an encoder, an optical sensor, or the like is used.

  The imaging table 2 includes a top plate 21 made of carbon or the like on which the subject S is placed and a position table 22, and the image receiving unit 3 is disposed in an internal space on the lower side of the top plate 21.

  The image receiving unit 3 includes an image receiver 30 that receives X-rays from the X-ray stop 11, and first and second moving units 31 and 32 that move the image receiver 30 in the X and Y directions of the imaging table 2. I have. As the image receiver 30, an X-ray flat panel detector (FPD) is preferably used. The first moving means 31 includes a vertical rail 31a extending in the X direction of the imaging table 2, a receiving frame 31b fixed to the lower portion of the receiver 30 and moved along the vertical rail 31a, and an interior of the vertical rail 31a. A ball shaft 31c disposed on the receiver 30, a moving body 31d fixed to the receiving frame 31b of the receiver 30 and screwed into the ball shaft 31c, and an end of the vertical rail 31a. It is comprised with the 1st pulse motor 31e to rotate. The second moving means 32 includes a horizontal rail 32a disposed along the Y direction of the imaging table 2 at the lower portion of the receiver 30, and a lower rail fixed to the lower portion of the receiver 30 to the horizontal rail 32a. A receiving frame 32b moved along, a ball shaft 32c disposed inside the horizontal rail 32a, a moving body 32d fixed to the receiver 30, and screwed into the ball shaft 32c, and the horizontal rail 32a And a second pulse motor 32e that rotates the ball shaft 32c. The image receiver 30 and the first and second moving means 31 and 32 are set on a support base 33 having a plurality of casters 33a.

  The vertical rail 31a and the horizontal rail 32a of the first and second moving means 31 and 32 are extended to the X and Y direction ends of the photographing table 2, respectively, and the receiver 30 is connected to the X and Y. The whole body of the subject S can be efficiently imaged with a single X-ray imaging apparatus by performing X-ray imaging by moving to near the end of the direction.

  In addition, the X-ray imaging apparatus includes a controller 4, a position detector 12 provided in the X-ray irradiator 11 is connected to the input side of the controller 4, and the first and second outputs are connected to the output side. The pulse motors 31e, 32e of the moving means 31, 32 are connected. As shown in FIG. 3, the controller 4 outputs a control amount to the pulse motors 31 e and 32 e and an arithmetic circuit that calculates a control amount to the pulse motors 31 e and 32 e based on the detection result by the position detector 12. Consists of an output circuit.

  Next, a procedure for performing X-ray imaging of the subject S using the above X-ray imaging apparatus will be described. First, at the time of X-ray imaging, the X-ray diaphragm 11 of the X-ray irradiation unit 1 is indicated by solid lines and virtual lines in FIGS. 1 and 2 in accordance with the imaging region of the subject S lying on the imaging table 2. Are moved in the X and Y directions of the imaging table 2. The imaging position of the X-ray diaphragm 11 is detected by the position detector 12, and the pulse motors 31e and 32e of the first and second moving means 31 and 32 are driven by the output from the controller 4 based on the position detection result, respectively. Thus, the image receiver 31 is automatically moved to the position facing the X-ray irradiator 11 so that the center lines of the image receiver 31 of the image receiving unit 3 and the X-ray irradiator 11 coincide with each other.

  By performing X-ray imaging in this manner, the image receiver 30 of the image receiving unit 3 is automatically positioned following the imaging position of the X-ray diaphragm 11 of the X-ray irradiating unit 1, so that it is used in combination with cassette imaging. Therefore, it is possible to efficiently perform imaging of each part of the body of the subject S in the height direction and the lateral direction with one X-ray imaging apparatus. Accordingly, although the top plate area is slightly larger than that of the conventional X-ray imaging apparatus, whole body imaging can be performed efficiently only with this apparatus, and the conventional cassette imaging is unnecessary. This shortens the shooting time, and the top plate does not slide, so the shooting table can be installed in a much smaller room than the conventional one.

It is a front view which shows the X-ray imaging apparatus concerning one Embodiment of this invention. It is a vertical side view of the X-ray imaging apparatus. It is explanatory drawing which shows the structure of a controller.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 X-ray irradiation part 12 Position detector 2 Imaging stand 3 Image receiving part 30 Image receiver 31 1st moving means 32 2nd moving means 4 Controller S Subject X X vertical direction Y horizontal direction

Claims (2)

An X-ray imaging apparatus for irradiating an X-ray from an X-ray irradiation unit to a subject lying on a radiography table and receiving an image on the image receiving unit,
The X-ray irradiator is freely disposed in the vertical direction in the height direction of the subject who is lying on the imaging table and in the horizontal direction perpendicular thereto, and detects the moving position. With
The image receiving unit includes an image receiver that receives the X-rays from the X-ray irradiation unit, and first and second moving units that move the image receiver in the vertical and horizontal directions of the imaging table.
A controller for moving the image receiver to a position facing the X-ray irradiation unit by first and second moving means of the image receiving unit based on a position detection result of the position detector of the X-ray irradiation unit; X-ray imaging device.   2. The X-ray imaging apparatus according to claim 1, wherein the first and second moving means of the image receiving unit are set so as to move to the ends in the vertical and horizontal directions of the imaging table.

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