KR100936075B1 - Collimator for x-ray - Google Patents

Abstract

PURPOSE: A collimator for an X-ray is provided to control an irradiation range of an X-ray by independently driving a first X shutter panel, a second X shutter panel, a first Y shutter panel, and a second Y shutter panel. CONSTITUTION: An X-ray emitted from an X-ray tube passes an opening part of a base plate(110). A first Y shutter panel(129) and a second Y shutter panel(139) are moved into a Y-axis direction in order to control degree of opening of the opening part of the base plate. A first Y shutter motor and a second Y shutter motor drive the first Y shutter panel and the second Y shutter panel. A first Y shutter axis and a second Y shutter axis deliver a driving force of the first Y shutter motor and the second Y shutter motor to the first Y shutter panel and the second Y shutter panel. A first X shutter panel(149) and a second X shutter panel(159) are moved into an X-axis direction in order to control degree of opening of the opening part of the base plate.

Description

X-ray irradiation range controller {Collimator for X-ray}

The present invention relates to an X-ray irradiation range adjusting apparatus, and more particularly, to an X-ray irradiation range adjusting apparatus that can be adjusted more quickly and finely.

In general, an apparatus for photographing a subject using X-rays is in a situation where the demand for medical care is improved due to the rapid growth of industrialization, and the demand for collimators is also increasing.

The collimator is provided with a pair of X-axis aperture panel and Y-axis aperture panel to open and close, so that the irradiation range of the radiated X-rays can be appropriately adjusted in a rectangular form by adjusting the left, right, top, and bottom ranges of the radiated X-rays. It plays a role.

The conventional collimator is provided with one drive shaft and one motor for driving a pair of X-axis aperture panels and Y-axis aperture panels, respectively, and consequently, drive two aperture panels with one motor and drive shaft. Therefore, the pair of aperture panels are coupled to each other by a ring or the like.

That is, after the diaphragm panel connected by the ring is moved to a predetermined position by the motor and the drive shaft, the diaphragm panel which is connected to the diaphragm panel is released and the diaphragm panel which is disconnected is stopped at the position, The connected aperture panel is moved according to the driving of the motor to adjust the interval of the aperture panel.

The X-axis aperture panel and the Y-axis aperture panel perform the same process to control the irradiation range of the X-ray by adjusting the opening degree of the aperture panel.

However, the conventional collimator as described above has a structure in which each panel constituting a pair of aperture panels is connected by a ring or the like and is transported by a single shaft, and thus, the vibration range generated when the coupling of the ring is released, etc. There is a problem that fine adjustment is difficult.

In addition, since the pair of aperture panels must be coupled to each other in close proximity to each other in order to re-adjust the interval of the panel, there is a problem in that it takes time to adjust the irradiation range.

The present invention is to solve the above problems, it is an object of the present invention to provide an X-ray irradiation range control device that can be adjusted quickly and finely the irradiation range of the X-rays.

In order to solve the above problems, according to an embodiment of the present invention, the base plate is formed with an opening through which the X-ray wave is incident through the X-ray tube, the first Y for controlling the opening degree while transferring the opening of the base plate in the Y-axis direction A first Y shutter unit comprising a shutter panel and a first Y shutter motor for driving the first Y shutter panel, a first Y shutter shaft for transmitting a driving force of the first Y shutter motor to the first Y shutter panel, and abutment with the first Y shutter panel. And a second Y shutter panel for adjusting the opening degree while transferring the opening of the base plate in the Y-axis direction, a second Y shutter motor for driving the second Y shutter panel, and a driving force of the second Y shutter motor to the second Y shutter panel. A second Y shutter portion including a second Y shutter shaft to be transferred to the first Y shutter portion, the first Y shutter portion and the second Y shutter portion, and A first X shutter panel for adjusting the opening degree of the opening of the base plate, a first X shutter motor for driving the first X shutter panel, and a first X shutter shaft for transmitting driving force of the first X shutter motor to the first X shutter panel. And a second X shutter panel disposed to abut against the first X shutter panel, the second X shutter panel adjusting the opening degree of the opening of the base plate while being transported in the X-axis direction, and the second X shutter panel being driven. An X-ray irradiation range adjusting apparatus is provided, including a 2X shutter motor including a 2X shutter motor and a second X shutter shaft which transmits a driving force of the second X shutter motor to the second X shutter panel.

The first Y-shutter portion to the second X-shutter portion, a motor that provides a rotational force, a shaft formed on the outer circumferential surface to transmit the rotational force of the motor, screwed to the shaft, the screw thread formed on the inner peripheral surface to be transported along the shaft by the rotation of the shaft It may include a block having a coupling hole, a bracket coupled to the block, a panel coupled to the bracket to cover an opening of the base plate, and a guide coupled to the bracket to guide the transfer of the panel.

The bracket on the side of the first Y shutter portion to the second X shutter portion located closer to the base blade may be bent so that the panel is located closer to the base plate side.

And, the rotation shaft of the motor is inserted into one side and the shaft is inserted into the other side, a plurality of slits are formed on the outer peripheral surface may further include a coupler for coupling the rotation shaft and the shaft of the motor.

In addition, it may be made of an aluminum material, selectively positioned so as to block the opening, and further comprising a filter shutter portion to pass through the X-ray wave incident through the opening.

On the other hand, according to another embodiment of the present invention, the base plate is formed with an opening through which the X-ray wave is incident through the X-ray tube, four shutter panels for controlling the opening degree of the opening while independently moving the opening in different directions, the An X-ray irradiation range adjusting device including four shafts and a motor for driving four shutter panels independently of each other is provided.

According to the present invention has the following effects.

First, since the first Y shutter panel to the second X shutter panel for adjusting the opening degree of the opening are driven by independent shafts and motors, the irradiation range of the X-rays can be more precisely adjusted.

Second, since each panel is driven by independent shafts and motors, compared to the conventional method, when the readjustment of the X-ray irradiation range is to be re-adjusted, it is possible to adjust more quickly because each panel is adjusted without close proximity to each other. .

Third, since the distance between the panel controlling the opening and the opening is designed to be close, there is an effect of obtaining a clearer X-ray image.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the description of this embodiment, the same name and the same reference numerals are used for the same configuration and additional description thereof will be omitted.

X-ray irradiation range adjusting device 100 according to an embodiment of the present invention, as shown in Figure 1 and 3, the base plate 110, the first Y shutter unit 120, the second Y shutter unit 130 , The first X shutter unit 140 and the second X shutter unit 150 may be formed.

The base plate 110 is formed with a tube coupling portion 112 to which an X-ray tube (not shown) is coupled to the rear surface, and an opening 114 through which an X-ray wavelength emitted from the X-ray tube (not shown) passes. Is formed.

As shown in FIG. 4, the first Y shutter unit 120 includes a first Y shutter motor 121, a first Y shutter shaft 123, a coupler 122, a first Y shutter connection block 124, and a first Y shutter. The guide 126 may include a first Y shutter bracket 125 and a first Y shutter panel 129.

The first Y shutter panel 129 is a component that selectively hides at least a portion of the opening 114 of the base plate 110. The first Y shutter panel 129 is made of a material such as lead that does not transmit X-ray waves, and moves to the Y axis to cover at least a portion of the opening 114.

Here, the Y-axis direction means the up and down direction with reference to the drawings.

The first Y shutter motor 121 is a component that provides a driving force for moving the first Y shutter panel 129 and may be made of a step motor, etc., in which the rotation angle is easily adjusted.

The first Y shutter shaft 123 is a component that is rotated according to the driving force of the first Y shutter motor 121 so that a thread 123a is formed on an outer circumferential surface of a portion of the shaft. The first Y shutter shaft 123 may be coupled to the first Y shutter motor 121 through a coupler 122. As shown in FIGS. 1 and 5, the coupler 122 is configured such that a rotation shaft of the motor is inserted into one side and an end of the first Y shutter shaft 123 is inserted into the other side. A plurality of slits 122a are formed on the outer circumferential surface. Therefore, even when excessive torque is applied such as rotation or movement of the first Y shutter panel 129 is prevented by foreign matter, the coupler 122 formed in the slit 122a is elastically deformed to prevent failure in other parts.

The first Y shutter connection block 124 is formed with a coupling hole 124a having a screw thread engaged with a screw thread formed on an outer circumferential surface of the first Y shutter shaft 123.

A first Y shutter bracket 125 is provided between the first Y shutter connection block 124 and the base plate 110. A first Y shutter panel 129 is coupled to one side of the first Y shutter bracket 125, and a first Y shutter guide 126 is provided between the first Y shutter bracket 125 and the base plate 110.

The first Y shutter guide 126 is coupled to the first Y shutter guide rail 127 provided in the base plate 110 in the Y-axis direction and the first Y shutter bracket 125 to the first Y shutter bracket 125. The first Y shutter guide slider 128 reciprocates the first Y shutter guide rail 127 according to the movement of the.

In addition, as shown in FIG. 6, the first Y shutter bracket 125 moves the base plate 110 so that the first Y shutter panel 129 is located closer to the opening 114 of the base plate 110. It is preferably formed to be bent toward. In the present embodiment, for example, the first Y shutter panel 129 is positioned approximately 5 mm apart from the base plate 110. However, the present invention is not limited thereto and may be formed at various intervals.

Accordingly, as the first Y shutter motor 121 rotates, the first Y shutter shaft 123 also rotates, and thus the first Y shutter connection block 124 screwed to the outer circumferential surface of the first Y shutter shaft 123. ) Moves up and down along the first Y-shutter shaft 123, and the position of the first Y-shutter panel 129 is adjusted up and down.

In addition, the second Y shutter unit 130 includes a second Y shutter motor 131, a second Y shutter shaft 133, a second Y shutter connecting block 134, a second Y shutter guide 136, and a second Y shutter bracket 135. And a second Y shutter panel 139.

The second Y shutter panel 139 is positioned to be in contact with the first Y shutter panel 129 at the same height as the first Y shutter panel 129 and is vertically conveyed in the Y-axis direction.

The second Y shutter motor 131, the second Y shutter shaft 133, the second Y shutter connecting block 134, the second Y shutter guide 136, and the second Y shutter bracket 135 are the first Y shutter motor described above. Since 121, the first Y shutter shaft 123, the first Y shutter connecting block 124, the first Y shutter guide 126, and the first Y shutter bracket 125 are substantially similar in structure, detailed description thereof will be omitted.

Since the first Y shutter bracket 125 and the second Y shutter bracket 135 are bent toward the base plate 110 side, the first Y shutter panel 129 and the second Y shutter panel 139 are arranged in the opening. Since it is located close to each other, there is an advantage that a clearer and clearer X-ray image can be obtained.

The first X shutter unit 140 includes a first X shutter panel 149, a first X shutter motor 141, a first X shutter shaft 143, a first X shutter connecting block 144, and a first X shutter guide 146. It may be made, including the first X shutter bracket 145.

The first X shutter panel 149 is disposed to overlap the first Y shutter panel 129 and the second Y shutter panel 139, and is transferred in the X axis direction orthogonal to the Y axis direction. It is a component made of a material such as lead to selectively cover at least a portion of.

The first X shutter motor 141 is similar to the first Y shutter motor 121 described above and provides a driving force for moving the first X shutter panel 149, and may be formed of a step motor and the like which can easily adjust the rotation angle. have.

The first X shutter shaft 143 is a component that is rotated according to the driving force of the first X shutter motor 141, similarly to the first Y shutter unit 120 described above, through the first X shutter motor 141 and the coupler. Can be combined.

Similar to the first Y shutter connection block 124 described above, the first X shutter connection block 144 is formed with a threaded coupling hole that is engaged with threads of an outer circumferential surface of the first X shutter shaft 143.

In addition, a first X shutter bracket 145 is provided between the first X shutter connection block 144 and the base plate 110. A first X shutter panel 149 is coupled to one side of the first X shutter bracket 145, and a first X shutter guide 146 is provided between the first X shutter bracket 145 and the base plate 110.

In addition, the second X shutter unit 150 includes the second X shutter panel 150, the second X shutter motor 151, the second X shutter shaft 153, the second X shutter connection block 154, and the second X shutter guide 156. And a second X shutter bracket 155.

The second X shutter panel 150 is positioned to be in contact with the first X shutter panel 149 at the same height as the first X shutter panel 149 and is moved left and right in the X-axis direction.

The second X shutter motor 151, the second X shutter shaft 153, the second X shutter connection block 154, and the second X shutter bracket 155 are the first X shutter motor 141 and the first X shutter shaft. 143, the first X shutter connection block 144 and the first X shutter bracket 145 are substantially similar in structure, so a detailed description thereof will be omitted.

Meanwhile, the first X shutter guide 146 and the second X shutter guide 156 may use the same guide rails 147 and 157 as illustrated in FIGS. 1 and 2. That is, the first X shutter guide slider 148 coupled to the first X shutter bracket 145 and the second X shutter guide slider 155 coupled to the first X shutter bracket 145 on one guide rail 147 and 157 placed in the X-axis direction. 158 may be configured to be slidably coupled.

The X-ray irradiation range adjusting device of the present embodiment made as described above operates as follows.

As shown in FIGS. 7 and 8, when the first Y shutter motor 121 operates, the first Y shutter shaft 123 rotates, and the first Y shutter connection block 124 is threaded upward. Is moved. Accordingly, the first Y shutter bracket 125 is also moved along the first Y shutter guide 126, and the first Y shutter panel 129 is moved upward.

And, as the same principle, as the second Y shutter motor 131 is operated, the second Y shutter shaft 133 is rotated, whereby the second Y shutter panel 139 is moved downward.

In addition, the first X shutter motor 141 is operated to rotate the first X shutter shaft 143, thereby moving the first X shutter panel 149 in the right direction. In addition, the second X shutter motor 151 is operated to rotate the second X shutter shaft 153, thereby moving the second X shutter panel 159 to the left.

Accordingly, the position and extent of the opening 114 being covered by the first Y shutter panel 129 to the second X shutter panel 150 are determined to adjust the irradiation range and irradiation position of the X-ray wave.

Meanwhile, the x-ray irradiation range adjusting device 100 of the present embodiment may further include a filter shutter unit 160 as shown in FIG. 9.

In general, the intensity of the x-ray wave depends on the angle to the target and the angle on the vertical axis. The X-ray wave intensity in the vicinity of the focal point where the X-ray wave is irradiated most strongly is called an effective X-ray intensity, and the filter shutter unit 160 is a component that controls the effective X-ray intensity.

The filter shutter unit 160 as described above may include a filter shutter motor 161, a filter shutter arm 163, and a filter shutter panel 169.

The filter shutter motor 161 provides a driving force, the filter shutter arm 163 is a component that transmits the driving force of the filter shutter motor 161 to the filter shutter panel 169, the filter shutter panel 169 is It is made of an aluminum material to selectively cover the portion opened by the first Y shutter panel 129 to the second X shutter panel 150 by the filter shutter motor 161.

Therefore, the X-ray wave irradiated through the portions opened by the first Y shutter panel 129 and the second X shutter panel 150 passes through the filter shutter panel 169 made of aluminum, and the effective X-ray intensity is adjusted.

As described above, the preferred embodiments of the present invention have been described, and the fact that the present invention can be embodied in other specific forms in addition to the above-described embodiments without departing from the spirit or scope thereof has ordinary skill in the art. It is obvious to them. Therefore, the above-described embodiments should be regarded as illustrative rather than restrictive, and thus, the present invention is not limited to the above description and may be modified within the scope of the appended claims and their equivalents.

1 is a perspective view showing an x-ray irradiation range adjusting apparatus according to an embodiment of the present invention;

2 is a front view of FIG. 1;

3 is a perspective view of the back of FIG. 1;

4 is a perspective view showing a part of the first Y shutter portion of FIG. 1;

FIG. 5 is a perspective view illustrating a coupler of the first Y shutter portion of FIG. 1; FIG.

6 is a cross-sectional view of FIG. 1;

7 is a perspective view illustrating a state in which the first to second X shutter portions of the X-ray irradiation range adjusting device of FIG. 1 are adjusted;

8 is a front view of FIG. 7; And,

FIG. 9 is a perspective view illustrating a state in which the filter shutter panel of FIG. 7 is blocked.

<Description of the symbols for the main parts of the drawings>

X-ray range adjuster: 100 Base plate: 110

Tube connection: 112 Opening: 114

First Y Shutter Part: 120 First Y Shutter Motor: 121

Coupler: 122 Slit: 122a

1st shutter shaft: 123 threads: 123a

1st Y shutter connecting block: 124 coupling hole: 124a

1Y Shutter Bracket: 125 1Y Shutter Guide: 126

1st Shutter Guide Rail: 127 1st Shutter Guide Slider: 128

1st shutter panel: 129

 Second Y Shutter Part: 130 Second Y Shutter Motor: 131

2nd Y shutter axis: 133 2nd Y shutter connecting block: 134

2Y Shutter Bracket: 135 2Y Shutter Guide: 136

2nd shutter panel: 139

1X Shutter Part: 140 1X Shutter Motor: 141

1X shutter shaft: 143 1X shutter connecting block: 144

1X Shutter Bracket: 145 1X Shutter Guide: 146

1X Shutter Guide Rail: 147 1X Shutter Guide Slider: 148

1X Shutter Panel: 149

2X Shutter Part: 150 2X Shutter Motor: 151

2X shutter shaft: 153 2X shutter connection block: 154

2X Shutter Bracket: 155 2X Shutter Guide: 156

2X Shutter Guide Rail: 157 2X Shutter Guide Slider: 158

2X Shutter Panel: 159

Filter Shutter Part: 160 Filter Shutter Motor: 161

Filter shutter arm: 163 Filter shutter panel: 169

Claims (6)

A base plate having an opening through which the X-ray wave is incident from the rear surface through the X-ray tube; The driving force of the first Y shutter motor and the first Y shutter motor to drive the first Y shutter panel and the first Y shutter panel to adjust the opening degree is provided on the front surface of the base plate to transfer the opening of the base plate in the Y-axis direction A first Y shutter portion including a first Y shutter shaft to transfer to the first Y shutter panel; A second Y shutter panel disposed to abut against a side of the first Y shutter panel facing in the Y-axis direction, the second Y shutter panel adjusting the opening degree while transferring the opening of the base plate in the Y-axis direction, and a second Y shutter motor driving the second Y shutter panel; A second Y shutter unit including a second Y shutter shaft configured to transmit a driving force of the second Y shutter motor to a second Y shutter panel; A first X shutter for controlling the opening degree of the opening of the base plate while overlapping the rear surface of the surface facing the base plate of the first Y shutter panel and the second Y shutter panel and transferring in the X axis direction orthogonal to the Y axis; A first X shutter unit including a panel, a first X shutter motor for driving the first X shutter panel, and a first X shutter shaft for transmitting a driving force of the first X shutter motor to the first X shutter panel; A second X shutter panel arranged to abut against a side facing the X-axis direction of the first X shutter panel and adjusting the opening degree of the opening of the base plate while being transported in the X-axis direction, and a second X shutter motor driving the second X shutter panel A second X shutter unit including a second X shutter shaft to transfer a driving force of the second X shutter motor to the second X shutter panel; X-ray irradiation range control device including. The method of claim 1, The first Y shutter portion, the second Y shutter portion, the first X shutter portion, and the second X shutter portion, A motor providing a rotational force; Threaded shaft on outer circumferential surface to transmit rotational force of motor A block screwed to the shaft, the coupling hole having a screw thread formed on an inner circumferential surface thereof so as to be moved along the shaft by rotation of the shaft; A bracket coupled to the block; A panel coupled to the bracket to cover an opening of the base plate; A guide coupled to the bracket to guide the transfer of the panel; X-ray irradiation range adjusting device characterized in that comprises a. The method of claim 2, The bracket of the first Y shutter unit and the second Y shutter unit, the side end portion coupled to the panel is bent toward the base plate is formed X-ray irradiation range adjusting device. The method of claim 2, The rotation axis of the motor is inserted into one side and the shaft is inserted into the other side, a plurality of slits are formed on the outer circumferential surface X-ray irradiation range adjusting apparatus characterized in that it further comprises a coupler for coupling the rotation axis and the shaft of the motor. The method of claim 1, Made of aluminum material, selectively positioned to block the opening, the x-ray irradiation range adjusting apparatus further comprises a filter shutter unit to pass through the X-ray wave incident through the opening. A base plate having an opening through which the X-ray wave is incident; Four shutter panels for adjusting the opening and opening positions of the openings while moving in one of the Y-axis directions or the X-axis directions orthogonal to the Y-axis directions; Four shafts and a motor for independently driving the four shutter panels; X-ray irradiation range adjusting device comprising a.

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