KR102604560B1 - Collimator for Controlling Irradiation Area of X-ray - Google Patents

Abstract

The present invention relates to a collimator controlled to define an irradiation area of an a first driving unit that drives the first movable unit; It includes a second driving unit that drives the second movable unit. The first driving part is connected to the first movable part with a first wire to drive the first movable part, and the second driving part is connected to the second movable part with a second wire to drive the second movable part.

Description

Collimator for Controlling Irradiation Area of X-ray}

The present invention relates to an apparatus and method for calculating area dose of an This relates to an area dose calculation device for an X-ray device that can calculate dose.

Typically, hospitals use X-ray equipment to diagnose patients.

Recently, efforts have been made to reduce the amount of radiation exposure to patients during X-ray diagnosis, and this exposure amount is related to the radiation dose.

According to the revised IEC 60601-1-3 standard and the “Common Standard for Electro-Mechanical Safety of Medical Devices (No. 2014-122)” established by the Ministry of Food and Drug Safety, It is stipulated that it be displayed as a dose value.

In order to satisfy these regulations, there is a trend to measure and display the X-ray area dose actually irradiated to the patient in X-ray devices, and the area dose display function is essential in fluoroscopy devices such as the C-Arm.

Generally, to measure the area dose, an area dosimeter is placed between the X-ray tube and the subject, and when X-rays are emitted from the X-ray tube, the area dosimeter measures the X-rays.

A conventional area dosimeter detects area dose by measuring the charge generated from ionization when radiation is irradiated into an ion chamber.

Conventional area dosimeters can improve detection accuracy by detecting actual irradiated X-rays, but the equipment is expensive and the size of the ion chamber is limited, so it is difficult to apply to various As the size of the ion chamber increases and the size of the ion chamber has to be small, there is a problem in that the sensitivity of the measurement decreases.

[Prior art literature]

Korean Patent Registration No. 10-1362464 (announced on February 12, 2014)

The present invention was devised to solve the above-mentioned problems. The purpose of the present invention is to measure the electric charge generated from ionization and detect the area dose through the opening through which The aim is to provide an area dose calculation device and method for an X-ray device that can calculate the area dose based on area.

The present invention relates to a collimator controlled to define an irradiation area of an a first driving unit that drives the first movable unit; It includes a second driving unit that drives the second movable unit. The first driving part is connected to the first movable part with a first wire to drive the first movable part, and the second driving part is connected to the second movable part with a second wire to drive the second movable part.

The first movable part may include a 1-1 movable part and a 1-2 movable part arranged to be moved away from or closer to each other by the operation of the first driving part, and the second movable parts are positioned toward each other by the operation of the second driving part. It may include a 2-1 movable part and a 2-2 movable part that are arranged to be away from or close to each other.

The 1-1 movable part and the 1-2 movable part may include a 1-1 fixed part and a 1-2 fixed part, respectively, fixed to the first wire, and the 2-1 movable part and the 2-2 movable part may include It may include a 2-1 fixing part and a 2-2 fixing part respectively fixed to the second wire.

The first driving unit may include a first rotation shaft and a first wire winding unit that winds or unwinds the first wire to advance the first wire in a first direction or a second direction according to rotation of the first rotation shaft.

The second driving unit may include a second rotation shaft and a second wire winding unit that holds the second wire to advance the second wire in the first or second direction according to rotation of the second rotation shaft.

The first wire winding unit includes a 1-1 hole through which the first wire enters, a 1-2 hole through which the first wire entering the 1-1 hole exits, and a 1-1 hole and a 1-2 hole. It may include a first wire passage extending between the holes.

The second wire winding unit includes a 2-1 hole through which the second wire enters, a 2-2 hole through which the second wire entering the 2-1 hole exits, and a 2-1 hole and a 2-2 hole. It may include a second wire passageway extending between the holes.

At least one of the first wire passage and the second wire passage may extend spirally.

The collimator according to the present invention may further include a first wire support part supporting the first wire in the extension direction of the first wire, and a second wire support part supporting the second wire in the extension direction of the second wire.

The collimator according to the present invention may further include a first sensor that detects the rotation amount of the first rotation shaft and a second sensor that detects the rotation amount of the second rotation shaft.

The first rotation shaft passes through the first wire winding portion and the second wire support portion, and the first wire winding portion is provided to rotate according to the rotation of the first rotation shaft, and the second wire support portion is not interlocked with the rotation of the first rotation shaft. can be provided.

The second rotation shaft passes through the second wire winding portion and the first wire support portion, and the second wire winding portion is provided to rotate according to the rotation of the second rotation shaft, and the first wire support portion is not interlocked with the rotation of the second rotation shaft. can be provided.

The first wire extends from the first wire winding portion through the first wire support portion to form a first closed loop, and the second wire extends from the second wire winding portion through the second wire support portion to form a second closed loop. can do.

A plurality of first wire supports and second wire supports may be provided along the extending direction of the first closed loop and the second closed loop.

The first wire winding part, the second wire winding part, the first wire support part, and the second wire support part have a cylindrical shape, and a plurality of grooves with different heights may be formed along the outer circumference.

The first wire extending from the hole in the groove of the first height of the first wire winding part passes through the 1-2 fixing part and is supported in the groove of the second height of the first wire support part to form the second wire of the first wire winding part. It can be extended to enter the hole in the groove of height.

The second wire extending from the hole in the groove at the second height of the second wire winding part passes through the 2-1 fixing part and is supported in the groove at the first height of the second wire support part to raise the second height of the second wire winding part. It can be extended to enter the hole in the groove.

The collimator according to the present invention may further include a first frame and a second frame. The first frame includes a 1-1 guide part and a 1-2 guide part, and the second frame includes a 2-1 guide part. Includes sub and 2-2 information section.

The 1-1 movable part includes a 1-1 guided part guided along the 1-1 guiding part and a 1-2 guided part guided along the 1-2 guiding part; The 1-2 movable part includes a 1-3 guided part guided along the 1-1 guided part and a 1-4 guided part guided along the 1-2 guided part; The 2-1 movable portion includes a 2-1 guided portion guided along the 2-1 guiding portion and a 2-2 guided portion guided along the 2-2 guiding portion; The 2-2 movable part includes a 2-3 guided part guided along the 2-1 guided part and a 2-4 guided part guided along the 2-2 guided part.

According to the area dose calculation device and method of the It has the advantage of reducing the manufacturing cost of the X-ray device and simplifying the structure.

According to the collimator according to the present invention, the thickness can be reduced by using a wire driving method instead of a gear method, and the weight and volume are also reduced compared to the conventional collimator.

Additionally, by reducing the thickness of the collimator, it can be assembled close to the X-ray tube, which has the advantage of reducing leakage dose to the outside.

1 is a conceptual diagram showing an environment in which a collimator according to the present invention is used.
Figure 2 is a block diagram of a collimator according to the present invention.
Figure 3 is a perspective view of a collimator according to an embodiment of the present invention.
Figure 4 is a perspective view from below of a collimator according to an embodiment of the present invention.
Figure 5 is a right side view of the collimator shown in Figure 3.
Figure 6 is a rear view of the collimator shown in Figure 3.
Figure 7 is a left side view of the collimator shown in Figure 3.
Figure 8 is a front view of the collimator shown in Figure 3.
Figure 9 is a schematic diagram for explaining the connection relationship between the first wire and the second wire of the collimator according to the present invention.
Figure 10 is a cross-sectional view of the wire winding portion of the collimator according to the present invention.
Figure 11 is a bottom view of the first frame of the collimator of the present invention.
Figure 12 is a top view of the second frame of the collimator of the present invention.
Figure 13 is a view showing the structure inside the first frame in the collimator of the present invention.
Figure 14 is a view showing the structure inside the second frame in the collimator of the present invention.
Figure 15 is a flowchart for explaining the area dose calculation method according to an embodiment of the present invention;
16 to 18 are diagrams for explaining offset values in the area dose calculation method according to an embodiment of the present invention.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

In this specification, only the minimum components necessary for description of the present invention are described, and components that are not related to the essence of the present invention are not mentioned. And it should not be interpreted in an exclusive sense that includes only the mentioned components, but should be interpreted in a non-exclusive sense that may also include other components that are not mentioned.

As used herein, “first,” “second,” or similar expressions are used to separately express the same or similar components or to distinguish the names of steps constituting the present invention, and are used in order. It does not mean that it is meaningful or plural.

The exemplary embodiments described herein provide a general understanding of the principles of the structure, function, fabrication and use of the devices and methods disclosed herein. One or more such embodiments are depicted in the accompanying drawings. Those skilled in the art will understand that the devices and methods specifically described herein and shown in the accompanying drawings are non-limiting illustrative embodiments and that the scope of the present invention is defined by the claims. Features shown and described in connection with one example embodiment may also be combined with features of other embodiments. Such modifications or variations are intended to be included within the scope of the present invention.

Figure 1 shows an example of an environment in which the collimator 1 according to the present invention is used. As shown in FIG. 1, the environment includes an X-ray generator 2, a collimator 1, a subject 3, an X-ray image acquisition unit 4, and an , includes a control unit 6 that controls the collimator 1. The control unit 6 may be configured to further include a function for controlling the operation of other components, such as the X-ray generator 2, in addition to the collimator 1.

Figure 2 shows a block diagram of the collimator 1 according to the present invention.

The collimator 1 according to the present invention includes a first movable part including a 1-1 movable part 11 and a 1-2 movable part 12, a 2-1 movable part 21, and a 2-2 movable part 22. ), a first driving part 30 that drives the first movable part, a second driving part 40 that drives the second movable part, and a first driving part 30 and a second driving part 40 It includes a control unit 6 that controls, a first sensor 80 that measures the amount of movement of the first movable part, and a second sensor 90 that measures the amount of movement of the second movable part. The first driving part 30 is connected to the first movable parts 11 and 12 with a first wire 101 and drives the first movable parts 11 and 12. The second driving part 40 is connected to the second movable parts 21 and 22 with a second wire 102 and drives the second movable parts 21 and 22. The first sensor 80 and the second sensor 90 detect the rotation amount of the first and second rotation shafts 31 and 41, respectively, and measure the distance between the first movable parts 11 and 12 and the second movable part ( 21, 22) can be calculated.

The 1-1 movable part 11 and the 1-2 movable part 12 are spaced apart from each other in parallel, and can be driven to move away from or closer to each other by the operation of the first driving part 30.

The 2-1st movable part 21 and the 2-2nd movable part 22 are spaced apart from each other in parallel, and can be driven to move away from or closer to each other by the operation of the second drive part 40.

The X-ray irradiation area is determined by the distance a between the 1-1 movable part 11 and the 1-2 movable part 12 and the distance b between the 2-1 movable part 21 and the 2-2 movable part 22. can be defined. X-rays that pass through the irradiation area defined by distances a and b are reflected through the mirror 400 and irradiated to the subject.

In one embodiment of the present invention shown in FIGS. 2 to 9, the X-ray irradiation area is defined as a square, but it can also take the form of another polygon or a circle or ellipse as long as it is a geometric shape that can calculate the irradiation area using an arithmetic formula. do.

Although the control unit 6 is shown in Figure 2 as controlling the first driving unit 30 and the second driving unit 40, a separate control unit separately controls the first driving unit 30 and the second driving unit 40. It can also be configured as:

Figure 3 shows a perspective view of the collimator 1 according to an embodiment of the present invention, Figures 4 to 8 show side views of the collimator 1 shown in Figure 3 from four directions, and Figure 9 shows the collimator 1 according to an embodiment of the present invention. A schematic diagram to explain the wire connection structure applied to the collimator is shown.

The first driving unit 30 includes a first rotating shaft 31 and a first wire winding unit 51 that is connected to rotate by rotation of the first rotating shaft 31, and operates accordingly even when the first rotating shaft 31 rotates. It includes a 2-1 wire support portion 70-1 that is not configured to rotate, and a first sensor 80 that detects the amount of rotation of the first rotation shaft 31. The 1-1 movable part 11 includes a 1-1 fixed part 112 fixed to the first wire 101, and the 1-2 movable part 12 includes a 1-1 fixed part 112 fixed to the first wire 101. 1-2 Includes a fixing part (111).

The second driving unit 40 includes a second rotating shaft 41 and a second wire winding unit 52 that is connected to rotate by rotation of the second rotating shaft 41, and operates accordingly even when the second rotating shaft 41 rotates. It includes a 1-3 wire support portion 60-3 that does not rotate along the wire support portion 60-3, and a second sensor 90 that detects the amount of rotation of the second rotation shaft 41. The 2-1 movable part 21 includes a 2-1 fixed part 222 fixed to the second wire 102, and the 2-2 movable part 22 includes a 2-1 fixed part 222 fixed to the second wire 102. 2-2 Includes a fixing part 211.

The collimator according to the present invention may further include a first frame 300 and a second frame 400.

The first frame 300 includes a 1-1 guide portion 310 and a 1-2 guide portion 320, and the second frame 500 includes a 2-1 guide portion 510 and a 2- 2 Includes a guide portion 520 (see FIGS. 11 to 14). The 1-1 guide part 310 and the 1-2 guide part 320 may be provided in the form of rails parallel to each other. The 2-1 guide part 510 and the 2-2 guide part 520 may be provided in the form of rails parallel to each other.

The 1-1 movable unit 11 includes a 1-1 guided unit 112 guided along the 1-1 guided unit 310 and a 1-2 guided unit guided along the 1-2 guided unit 320. Includes interior 113.

The 1-2 movable unit 12 includes a 1-3 guided unit 124 guided along the 1-1 guided unit 310 and a 1-4 guided unit guided along the 1-2 guided unit 320. Includes interior 123.

The 2-1 movable unit 21 includes a 2-1 guided unit 213 guided along the 2-1 guided unit 510 and a 2-2 guided unit guided along the 2-2 guided unit 520. Includes interior 214.

The 2-2 movable part 22 includes a 2-3 guided part 223 guided along the 2-1 guided part 510 and a 2-4 guided part guided along the 2-2 guided part 520. Includes interior (224).

As shown in FIG. 10, the first wire winding unit 51 and the second wire winding unit 52 have first holes 201 and 301 through which the wires 101 and 102 or the second wire 102 enter. and the second hole (202, 302) through which the wire (101, 102) entering the first hole (201, 301) exits, and between the first hole (201, 301) and the second hole (202, 302). It includes wire passages 210 and 310 extending from. The first holes 201 and 301 and the second holes 202 and 302 may be provided to have different heights. The wire passages 210 and 310 may be provided as spiral passages.

The first wire 101 and the second wire 102 are fixed to the wire winding part without passing through the first wire winding part 51 and the second wire winding part 52, and are connected to the first rotating shaft 31 and the second wire winding part 52. It may be configured to be wound or unwound by rotation of the rotation shaft 41.

A plurality of, for example, two grooves may be provided along the circumference of the first wire winding portion 51 and the second wire winding portion 52. The first holes 201 and 301 are in the upper groove, and the second hole is in the upper groove. (202, 302) may be provided in the bottom groove.

The first wire support part supports the first wire 101 along the extension direction of the first wire 101, and includes a 1-1 wire support part 60-1 and a 1-2 wire support part 60-2. and a 1-3 wire support portion 60-3.

The second wire support part supports the second wire 102 along the extension direction of the second wire 102, and includes a 2-1 wire support part 70-1 and a 2-2 wire support part 70-2. and a 2-3 wire support portion 70-3.

The first wire winding portion 51, the second wire winding portion 52, and the wire support portion may be cylindrical and may be provided with a plurality of grooves, for example, two grooves, along the circumference. The extension direction of the wire will be described with reference to FIGS. 3 to 9. The number of grooves may be provided in excess of two. And a plurality of grooves may be provided to have different heights.

The first wire 101 coming out of the first hole 201 of the first wire winding part 51 is connected to the 1-2 fixing part 111 so that the 1-2 fixing part 111 moves together along the wire progress direction. It is fixed and extended at (111). The first wire 101 may be fixed while passing through the 1-2 fixing part 111, or may be fixed to the outside of the 1-2 fixing part 111. Next, the first wire 101 is supported in the lower groove of the 1-1 wire support part 60-1 and passes through the lower groove of the 1-2 wire support part 60-2 to the 1-1 fixing part. It is fixed at (122). The first wire 101 is fixed to and extends from the 1-1 fixing part 122 so that the 1-1 fixing part 122 moves together with the wire moving direction.

The first wire 101 is supported in the lower groove of the 1-3 fixing part 60-3 and then enters the second hole 202 of the first wire winding part 51. The first wire 101 entering the second hole 202 advances to the first hole 201 through the passage 210 inside the first wire winding unit 51.

The 1-3 wire support portion 60-3 has a diameter of the passage 603 through which the second rotation shaft 41 passes so that it does not rotate in conjunction with the rotation of the second rotation shaft 41. It can be configured larger. Alternatively, the 1-3 wire support portion 60-3 may be configured not to rotate in conjunction with the rotation of the second rotation shaft 41 using other known technical means.

The second wire 102 coming out of the second hole 301 of the second wire winding unit 52 is connected to the 2-1 fixing part 222 so that the 2-1 fixing part 222 moves together with the wire moving direction. Fixed and extended at (222). The second wire 102 may be fixed while passing through the 2-1 fixing part 222, or may be fixed to the outside of the 2-1 fixing part 222. Next, the second wire 102 extends while being supported in the upper groove of the 2-1 wire support portion 70-1, and extends through the upper groove of the 2-2 wire support portion 70-2. 2-2 It is fixed to the fixing part 211. The second wire 102 is fixed to and extends from the 2-2 fixing part 211 so that the 2-2 fixing part 211 moves together with the wire moving direction.

The extending second wire 102 passes through the upper groove of the 2-3 wire support part 70-3 and enters the first hole 301 of the second winding part 52. The second wire 102 entering the first hole 301 advances to the second hole 302 through the passage 310 inside the second wire winding unit 52.

The 2-1 wire support portion 70-1 has a diameter of the passage 701 through which the first rotation shaft 31 passes so that it does not rotate in conjunction with the rotation of the first rotation shaft 31. It can be configured larger. Alternatively, the 2-1 wire support portion 70-1 may be configured not to rotate in conjunction with the rotation of the first rotation shaft 31 using other known technical means.

3 to 9 show that three first and second wire supports are provided, but other numbers of wire supports may be provided.

3 to 9, the first wire 101 extending from the first wire winding portion 51 is shown to be supported in the lower groove of the first wire support portion 60, and the second wire winding portion 52 ) is shown as being supported in the upper groove of the second wire support portion 70, but the opposite embodiment is also possible. That is, the first wire 101 may be supported in the upper groove of the first wire supporter 60, and the second wire 102 may be supported in the lower groove of the second wire supporter 70. In such an embodiment, the entry and exit holes of the first wire 101 and the second wire 102 through which they enter and exit the first wire winding section 51 and the second wire winding section 52 are shown in Figures 3 to 3. This is the opposite of the embodiment shown in Figure 9.

Next, the operation of the collimator 1 according to the present invention will be described.

When the first drive unit 30 operates, that is, rotates the first rotation shaft 31, the first wire winding portion 51 provided to rotate according to the rotation of the first rotation shaft 31 rotates, and the first wire winding portion 51 rotates. The first wire 101 passing through the attachment 51 is wound or unwound. As the first wire 101 is wound or unwound, the 1-1 fixing part 122 and the 1-2 fixing part 111 fixed to the first wire 101 move away from each other or move closer to each other. The distance a of 2 is adjusted. At this time, the first movable parts 11 and 12 may move along the first guide part 310 and the second guide part 320.

When the second driving unit 40 operates, i.e., rotates the second rotation shaft 41, the second wire winding portion 52 provided to rotate according to the rotation of the second rotation shaft 41 rotates, and the second wire winding portion 52 rotates. The second wire 102 passing through the attachment 52 is wound or unwound. As the second wire 102 is wound or unwound, the 2-1 fixing part 222 and the 2-2 fixing part 211 fixed to the second wire 102 move away from each other or move closer to each other. The distance b of 2 is adjusted. At this time, the second movable parts 21 and 22 can move along the 2-1 guide part 510 and the 2-2 guide part 520.

Distance a and distance b can be calculated by physical quantities measured by the first sensor 80 and the second sensor 90 that detect the rotation amounts of the first and second rotation shafts 31 and 41.

Below, the process of calculating the area dose of X-rays is explained in detail. Figure 15 is a flowchart for explaining the area dose calculation method according to an embodiment of the present invention.

Referring to Figure 15, the area dose calculation method of the present invention is a method that can accurately calculate the area dose using a calculation method without a separate area dosimeter. Area dose calculation according to the present invention may be performed by the control unit 6 or may be performed by a separately provided electronic calculation device (not shown).

First, measurement values are received from the first sensor 80 and the second sensor 90, and the horizontal length (a) and vertical length values (b) of the opening area are checked (S1000).

In reality, the measured value is a voltage value, and the horizontal length value (a) and vertical length value (b) are calculated in proportion to the magnitude of the measured voltage.

When the first sensor 80 and the second sensor 90 are potential meters (variable resistance), a resistance value that varies depending on the amount of rotation of the first and second rotation shafts 31 and 41 is set to a predetermined electric circuit. It can be converted to voltage and input.

For example, if the maximum voltage value is 5V, it can be recognized as a fully open length, if it is 0V, it can be recognized as a completely closed length, and if it is 2.5V, it can be recognized as a half-open length.

Meanwhile, if the sensor value is not initialized, the opening area may be calculated to exceed the maximum area or be below the minimum area, so initialization is necessary.

If the horizontal length value (a) or the vertical length value (b) does not exceed the maximum and minimum values, initialization is not necessary, so the horizontal length value (a) and vertical length value (b) calculated from the measured value are stored as is. (S1600).

Next, the tube voltage (kV) and milliampere second (mAs) for X-ray generation are set (S2000).

In addition, the milliampere second (mAs) is a value obtained by multiplying the tube current (mA) by the irradiation time (s:second), and the tube current and irradiation time are not set separately but are set in milliampere seconds.

Next, X-rays are irradiated at the set value (S3000).

In addition, the actual tube voltage (kV) and actual tube current (mA) are fed back (S4000), the actual irradiation time (ms) is controlled, and the actual tube voltage (kV), actual tube current (mA), and actual irradiation time (ms) are calculated. and save it as research information.

In more detail, first, feedback on the actual output tube voltage (kV) and tube current (mA) is input (S4100), and the total irradiation time (ms) is controlled from the set milliampere second value (S4200).

For example, if the actual tube current is 30mA and the milliampere second is 1mAs, the total irradiation time is approximately 33ms.

Next, the timer is increased until the irradiation time corresponding to the set milliampere second (S4400), and the feedback value of the input analog tube voltage/tube current is periodically scanned as digital values (ADC1, ADC2) during the set irradiation time (S4500). The scanned values are stored in the buffer (kV_A, mA_A) (S4600).

Next, when the timer value reaches the set irradiation time, X-ray irradiation is terminated and the last saved buffer values (tube voltage (kV=kV_A), tube current (mA=mA_A), irradiation time (ms=Timer)) are updated. (S4700).

Next, the area dose (DAP: dose area product) is calculated by multiplying the stored actual tube voltage (kV), actual tube current (mA), and actual irradiation time (sec ms) by the aperture area (S5000).

Additionally, the opening area can be calculated as the product of the horizontal length value (a) and the vertical length value (b). However, if the opening area is a geometric shape other than a square, the area is calculated using the appropriate area calculation method.

Next, the calculated area dose is output (S6000).

On the other hand, the X-ray generator 2 may show a slight difference in the actual amount of Or multiply it.

The offset value is calculated and stored in advance.

16 to 18 are diagrams for explaining offset values in the area dose calculation method according to an embodiment of the present invention.

Referring to FIG. 16, power of the tube voltage and tube current that can be output is supplied and controlled.

In the present invention, a total of 14 irradiation conditions are basically set, and the number or combination of irradiation conditions can be changed (see FIGS. 17 and 18).

In addition, the method of calculating the offset value is to set the aperture area to 1 (maximum opening) and milliampere second to 1 mAs under irradiation condition No. 1, tube voltage of 40 kV and tube current of 30 mA, and then use the actual area dosimeter (1). Then measure the area dose. As a result of the actual measurement, an area dose of 0.9μG was detected.

Additionally, since milliampere second is set to 1mAs, the irradiation time (ms) is calculated as 33ms according to the formula 30mA×sec=1mAs, and the area dose per unit time (1ms) is 0.027μG (0.9μG/33ms).

Finally, in investigation condition number 1, the offset value is calculated by Equation 1 below.

Additionally, the final calculation method for area dose (DAP) according to an embodiment of the present invention is as shown in Equation 2 below.

Here, a is the horizontal length of the opening area, b is the vertical length of the opening area, kV is the actual tube voltage, A is the actual tube current, and sec (ms) is the actual irradiation time.

Although the present invention has been described above with reference to the accompanying drawings, the scope of the present invention is determined by the patent claims described later and should not be construed as being limited to the above-described embodiments and/or drawings. In addition, it should be clearly understood that improvements, changes and modifications of the invention described in the patent claims, which are obvious to those skilled in the art, are also included in the scope of rights of the present invention.

First moving part: 11, 12 Second moving part: 21, 22
1st driving part: 30 2nd driving part: 40
First wire winding section: 51 Second wire winding section: 52
1st frame: 300 2nd frame: 500

Claims (12)

In the collimator controlled to define the irradiation area of the X-ray device,
a first movable part and a second movable part driven to define an irradiation area;
A first driving unit that drives the first movable unit,
It includes a second driving unit that drives the second movable unit,
The first driving unit is connected to the first movable unit with a first wire to drive the first movable unit,
The second driving unit is connected to the second movable unit with a second wire to drive the second movable unit,
The first movable part includes a 1-1 movable part and a 1-2 movable part arranged to move away from or get closer to each other by the operation of the first driving part,
The second movable part includes a 2-1 movable part and a 2-2 movable part that are arranged to move away from or get closer to each other by the operation of the second driving part,
The 1-1 movable part and the 1-2 movable part include a 1-1 fixed part and a 1-2 fixed part respectively fixed to the first wire,
The 2-1 movable part and the 2-2 movable part include a 2-1 fixed part and a 2-2 fixed part respectively fixed to the second wire,
The first driving unit includes a first rotation shaft and a first wire winding unit that winds or unwinds the first wire to advance the first wire in a first direction or a second direction according to the rotation of the first rotation shaft,
The second driving unit includes a second rotation shaft and a second wire winding portion that holds the second wire to advance the second wire in the first or second direction according to the rotation of the second rotation shaft,
The first wire winding unit includes a 1-1 hole through which the first wire enters, a 1-2 hole through which the first wire entering the 1-1 hole exits, and a 1-1 hole and a 1-2 hole. comprising a first wire passageway extending between the holes,
The second wire winding unit includes a 2-1 hole through which the second wire enters, a 2-2 hole through which the second wire entering the 2-1 hole exits, and a 2-1 hole and a 2-2 hole. comprising a second wire passageway extending between the holes,
collimator.
delete delete delete delete In claim 1,
At least one of the first wire passage and the second wire passage extends helically,
collimator.
In claim 1,
a first wire support portion supporting the first wire in the direction in which the first wire extends;
Further comprising a second wire support portion supporting the second wire in the extension direction of the second wire,
collimator.
In claim 7,
A first sensor that detects the rotation amount of the first rotation shaft,
Further comprising a second sensor that detects the rotation amount of the second rotation shaft,
collimator.
In claim 7,
The first rotation shaft passes through the first wire winding portion and the second wire support portion, and the first wire winding portion is provided to rotate according to the rotation of the first rotation shaft, and the second wire support portion is not interlocked with the rotation of the first rotation shaft. provided,
The second rotation shaft passes through the second wire winding portion and the first wire support portion, and the second wire winding portion is provided to rotate according to the rotation of the second rotation shaft, and the first wire support portion is not interlocked with the rotation of the second rotation shaft. provided,
collimator.
In claim 7,
The first wire extends from the first wire winding portion through the first wire support portion to form a first closed loop,
The second wire extends from the second wire winding portion through the second wire support portion to form a second closed loop,
A plurality of first wire supports and second wire supports are provided along the extension direction of the first closed loop and the second closed loop,
collimator.
In claim 10,
The first wire winding part, the second wire winding part, the first wire support part, and the second wire support part have a cylindrical shape, and a plurality of grooves with different heights are formed along the outer circumference,
The first wire extending from the hole in the groove of the first height of the first wire winding part passes through the 1-2 fixing part and is supported in the groove of the second height of the first wire support part to form the second wire of the first wire winding part. It extends to enter the hole in the groove at the height,
The second wire extending from the hole in the groove at the second height of the second wire winding part passes through the 2-1 fixing part and is supported in the groove at the first height of the second wire support part to raise the second height of the second wire winding part. Extending to enter the hole of the groove,
collimator.
In claim 1,
Further comprising a first frame and a second frame,
The first frame includes a 1-1 guide portion and a 1-2 guide portion,
The second frame includes a 2-1 guide portion and a 2-2 guide portion,
The 1-1 movable portion includes a 1-1 guided portion guided along the 1-1 guiding portion and a 1-2 guided portion guided along the 1-2 guiding portion,
The 1-2 movable portion includes a 1-3 guided portion guided along the 1-1 guided portion and a 1-4 guided portion guided along the 1-2 guided portion,
The 2-1 movable portion includes a 2-1 guided portion guided along the 2-1 guiding portion and a 2-2 guided portion guided along the 2-2 guiding portion,
The 2-2 movable part includes a 2-3 guided part guided along the 2-1 guided part and a 2-4 guided part guided along the 2-2 guided part,
collimator.

Images