JP4992653B2 - X-ray movable diaphragm and round trip X-ray imaging system - Google Patents

Description

  The present invention relates to an X-ray movable diaphragm used in an X-ray fluoroscopic apparatus.

  The X-ray movable diaphragm is for adjusting the irradiation range in order to prevent unnecessary exposure by irradiating only a necessary area of the subject with X-rays when performing X-ray imaging. Hereinafter, a configuration example of a general X-ray movable diaphragm will be described with reference to FIGS. Here, FIG. 5 is a diagram showing the external appearance of the X-ray movable diaphragm 1, and FIG. 6A is a portion related to the present invention when the X-ray movable diaphragm 1 cut by the cutting plane A of FIG. FIG. FIG. 6B is a cross-sectional view taken along the line AA of FIG. 6A, and shows a portion related to the present invention. In general, the X-ray movable diaphragm has a function of indicating the X-ray irradiation range with light. However, since this function is not particularly related to the present invention, description thereof is omitted. As shown in FIG. 5, the X-ray movable diaphragm 1 has a rectangular parallelepiped case 2, and a diaphragm rotating unit 3 for rotatably mounting on the front surface of an X-ray tube (not shown) is provided at the center of the upper surface. It has been. A vertical opening / closing knob 7 and a horizontal opening / closing knob 8 for adjusting the X-ray irradiation range are attached to the side surface of the case 2.

  The central portion of the upper surface and the lower surface of the case 2 is cut out with an appropriate width so that the X-ray irradiated from the X-ray tube can pass through the X-ray movable diaphragm 1 without being absorbed. A hole 4 is also provided at the center of the hole. Furthermore, as shown in FIG. 6A, the X-ray movable diaphragm 1 is configured with an X-ray absorber such as lead in order to shield a part of the passing X-rays and adjust the irradiation range. Two rectangular vertical leaves 17 arranged in parallel to each other and two rectangular horizontal leaves 21 arranged in parallel to each other perpendicular to these are provided, and are surrounded by the vertical leaves 17 and the horizontal leaves 21. A rectangular space forms an X-ray irradiation range.

  Next, an example of a mechanism for adjusting the above-described X-ray irradiation range will be described with reference to FIG. Inside the case 2, as shown in FIG. 6 (a), there are four pulleys 9 and 14 that are arranged at positions corresponding to the four corners of each of the two rectangles and whose central axes are supported by the case 2. Exists. Then, the lateral leaf wire 11 circumscribes the four pulleys 9 and the longitudinal leaf wire 10 circumscribes the four pulleys 14 without any slack. 2 is fixed to the rotating shaft 7A of the vertical opening / closing knob 7 which is rotatably attached to the front surface of the front opening 2 after being wound around in the opposite direction. It is fixed to 8A in the same way.

  Further, the vertical leaf slider 12 is attached to the upper and lower sides of the rectangle formed by the vertical leaf wire 10 at positions substantially symmetrical with respect to the center of the rectangle. On the left side and the right side, horizontal leaf sliders 13 are attached at positions that are substantially point-symmetric with respect to the center of the rectangle. As a result, when the vertical opening / closing knob 7 is rotated, the two vertical leaf sliders 12 slide to the left or right in the figure while maintaining a substantially point-symmetrical relationship with each other, and the horizontal opening / closing knob 8 is rotated. The two horizontal leaf sliders 13 slide up or down in the figure while maintaining a substantially point-symmetrical relationship with each other in accordance with the rotation direction.

  The vertical and horizontal widths of the X-ray rectangular irradiation range are adjusted by sliding the vertical leaf slider 12 and the horizontal leaf slider 13, both of which are adjusted by the same method. Now, the adjustment of the width by the two vertical leaves 17 will be described. A vertical leaf support arm 15 is shown in FIG. 6 (b) on each surface parallel to both sides of the upper and lower sides of the rectangle formed by the vertical leaf wire 10 shown in FIG. 6 (a) and perpendicular to the paper surface. The fulcrum 16 shown is supported by the case 2 so as to be rotatable. A rectangular vertical leaf 17 made of an X-ray absorber such as lead is provided at the end of each vertical leaf support arm 15 opposite to the fulcrum 16 so that the vertical leaf wire 10 is perpendicular to the vertical leaf support arm 15. Are attached in the direction of the inside of the rectangle formed.

  Further, the two vertical leaf sliders 12 have a cylindrical pin 12A which is perpendicular to itself and directed inward of the rectangle formed by the vertical leaf wire 10 at the center thereof. Each vertical leaf support arm 15 is provided with a long hole 18 having a width slightly wider than the diameter of the pin 12A, as shown in FIG. 6 (b), and each of the two vertical leaf sliders 12 is provided. The pins 12A are arranged so as to pass through the long holes 18 of the respective vertical leaf support arms 15. With such a structure, when the vertical opening / closing knob 7 is rotated to the left or right, the two vertical leaf sliders 12 slide, and the two vertical leaves 17 correspond to the respective fulcrums according to the rotation direction of the vertical opening / closing knob 7. The horizontal width of the X-ray rectangular irradiation range is adjusted by moving in directions toward or away from each other on a circle centered on 16. In FIG. 6, parts and the like denoted by the same reference numerals as those in FIG. 5 are the same as those in FIG.

  FIG. 4 shows an example in which such an X-ray movable diaphragm 1 is attached to an X-ray imaging apparatus, particularly a mobile X-ray imaging apparatus. Reference numeral 30 denotes a round-trip X-ray imaging apparatus which is a kind of mobile X-ray imaging apparatus. The telescopic X-ray tube holding arm 35 is attached to a support column 34 rotatably attached to the front part thereof so as to be movable up and down. An X-ray tube 31 is attached to the tip, and the X-ray movable diaphragm 1 is attached to the X-ray tube 31. Since the round-trip X-ray imaging apparatus 30 is movable, it is moved to the vicinity of the subject 32 placed on the bed 33 in the hospital room, and then an X such as a cassette with a built-in film between the subject 32 and the bed 33. A line light receiving unit (not shown) is arranged, the X-ray tube 31 is arranged at an appropriate position above the subject 32, and a vertical opening / closing knob 7 and a horizontal opening / closing attached to the front part of the X-ray movable diaphragm 1. By operating the knob 8, the X-ray irradiation range is adjusted.

  At this time, if the wall shown in FIG. 4 does not exist, an operator (not shown) can easily turn around the wall and install the vertical opening / closing knob 7 and the horizontal opening / closing knob 8 attached to the front surface of the X-ray movable diaphragm 1. However, it is often the case that the operator cannot stand on the front side of the X-ray movable diaphragm 1 because a wall is present at the position shown in FIG. In such a case, the X-ray movable diaphragm 1 can be rotated 180 degrees with the X-ray tube 31 attached to the X-ray movable diaphragm 1 so that the vertical opening / closing knob 7 and the horizontal opening / closing knob 8 are directed to the round X-ray imaging apparatus 30 side. The operation for that is not easy. In order to rotate, it is necessary to sag a cable (not shown) connected to the X-ray movable diaphragm 1. The slack of this cable hinders the operation of the round-trip X-ray imaging apparatus 30. is there.

Therefore, as shown in FIG. 7, the vertical opening / closing knob 7 and the horizontal opening / closing knob 8 are arranged on both the front surface and the rear surface of the X-ray movable diaphragm 1, and the corresponding knobs on the front surface and the rear surface are respectively connected to the connecting shaft 19 and An apparatus has been devised that can be operated from either the front surface portion or the rear surface portion by connecting at 20 (see, for example, Patent Document 1). In FIG. 7, parts and the like denoted by the same reference numerals as those in FIG. 5 are the same as those in FIG.
JP 2004-121407 A

  The vertical opening / closing knob and the horizontal opening / closing knob for adjusting the X-ray irradiation range are attached to the front surface of the X-ray movable diaphragm so as to be easy to operate. When used by being attached to a mobile X-ray imaging apparatus, there are cases where the front portion is disposed close to a wall or the like of a hospital room and the knob operation is difficult. In such a case, the X-ray movable diaphragm can be rotated 180 degrees with the X-ray movable tube attached to the X-ray tube, and the vertical open / close knob and horizontal open / close knob can be directed to the round X-ray imaging apparatus. However, for rotation, it is necessary to slack the cable connected to the X-ray movable diaphragm, which is not preferable because it interferes with the operation of the round-trip X-ray imaging apparatus.

  Therefore, the vertical opening and closing knobs and the horizontal opening and closing knobs are arranged on both the front and rear surfaces of the X-ray movable diaphragm, and the corresponding knobs on the front and rear surfaces are connected to each other by a connecting shaft. Although it has been devised that it can also be operated from the front, this method places the knobs on the front and rear surfaces in the opposite direction, and the direction in which the knobs are turned is also reversed on the front and rear surfaces. For this reason, there is a problem that it is difficult to operate the knob because the reverse operation is necessary on the front and rear surfaces. The present invention is intended to solve these problems.

In order to achieve the above object, the invention described in claim 1 includes two sets of movable leaves for adjusting the X-ray irradiation range and two operations for operating the two sets of movable leaf opening / closing mechanisms. In the X-ray movable diaphragm provided with a knob and a case for storing the movable leaf, the surface of the case opposite to the surface on which the two operation knobs are attached is similar to the two operation knobs. Two separate operation knobs are provided to operate two sets of movable leaf opening and closing mechanisms, and the operation knobs with the same function are arranged diagonally with respect to each of the two operation knobs provided on one and the other surface. X-ray movable diaphragm.
According to a second aspect of the present invention, a set of vertical leaves and a set of horizontal leaves for adjusting the X-ray irradiation range in the vertical direction and the horizontal direction, and an opening / closing mechanism for the set of vertical leaves are operated. An X-ray movable diaphragm comprising a first vertical opening / closing knob, a first horizontal opening / closing knob for operating the pair of horizontal leaf opening / closing mechanisms, and a case for storing these leaves. The second vertical opening / closing knob and the second horizontal opening / closing knob having the same function on the surface opposite to the surface on which the two operation knobs are attached are respectively the first vertical opening / closing knob and the second horizontal opening / closing knob. It is attached diagonally to the
The first and second longitudinal opening and closing knobs are wound around the rotating shafts in opposite directions and are attached to the loop via pulleys provided at four corners of the case, and the first and second longitudinal opening and closing knobs. A side mounted around the loop via pulleys provided at four corners different from the pulleys provided at the four corners of the case, wound around the rotation axis of the second horizontal opening / closing knob in opposite directions. A leaf wire;
A pair of vertical leaf sliders which are attached to the vertical leaf wires so as to face each other and are brought into contact with the set of vertical leaves so as to open and close as the vertical leaf wires move. When,
A pair of horizontal leaf sliders that are attached to the lateral leaf wires so as to face each other and are brought into contact with the pair of lateral leaves so as to open and close as the lateral leaf wires move. When,
By providing
The vertical leaf is opened and closed by rotating one of the first and second vertical opening / closing knobs, and the horizontal leaf is opened / closed by rotating either the first or second horizontal opening / closing knob. An X-ray movable diaphragm is characterized by being configured.
Further, the invention according to claim 3 is a support column rotatably attached to the front portion, an X-ray tube holding arm attached to the support column, and an X-ray tube attached to the tip of the X-ray tube holding arm. The X-ray movable diaphragm according to claim 1, wherein one of the surfaces on which the knob is provided faces the longitudinal front portion of the X-ray tube holding arm and the other faces the rear portion. The X-ray imaging apparatus for round visits is characterized by being attached to the X-ray.

  According to the present invention, since the knobs are arranged on both the front and rear surfaces of the X-ray movable diaphragm, the operator can adjust the X-ray irradiation range from either the front or rear direction of the X-ray movable diaphragm. Further, since the direction in which the knob is turned and the arrangement of the knob are the same on the front and rear surfaces, the apparatus is easier to use for the operator than the conventional apparatus.

  An embodiment of the present invention will be described with reference to FIGS. Here, FIG. 3 is a view showing the appearance of the X-ray movable diaphragm 51 according to the present invention, and FIG. 1 is a portion related to the present invention when the X-ray movable diaphragm 51 cut by the cutting plane A in FIG. FIG. FIG. 2 is a cross-sectional view taken along the line AA of FIG. 1, and is a view showing a part related to the present invention. 1 to 3 are the same as those shown in FIGS. 5 and 6 because the components and the like shown in FIGS. 5 and 6 are the same as those shown in FIGS.

  As shown in FIG. 3, the X-ray movable diaphragm 51 has a normal rectangular parallelepiped case 2, and a diaphragm rotating section 3 for rotatably mounting on the front surface of an X-ray tube (not shown) is provided at the center of the upper surface. It has been. The central portions of the upper surface and the lower surface of the case 2 are cut out at an appropriate width so that the X-rays irradiated from the X-ray tube can pass through the X-ray movable diaphragm 51 without being absorbed. A hole 4 is also provided at the center of the hole. Further, as shown in FIG. 1, the X-ray movable diaphragm 51 is made up of an X-ray absorber such as lead and is parallel to each other in order to adjust the irradiation range by blocking a part of the passing X-rays. A rectangular space surrounded by the vertical leaf 17 and the horizontal leaf 21 is provided with the two rectangular vertical leaves 17 arranged and two rectangular horizontal leaves 21 arranged in parallel to each other. Forms an X-ray irradiation range.

  Next, an example of a mechanism for adjusting the X-ray irradiation range will be described with reference to FIGS. As shown in FIG. 1, there are four pulleys 9 and 14 that are arranged at positions corresponding to the four corners of each of the two rectangles and whose central axes are supported by the case 2 inside the case 2. Then, the lateral leaf wire 11 circumscribes the four pulleys 9 and the longitudinal leaf wire 10 circumscribes the four pulleys 14 without any slack. 2 is fixed to the rotating shaft 7A of the vertical opening / closing knob 7 which is rotatably attached to the front surface of the front opening 2 after being wound around in the opposite direction. It is fixed to 8A in the same way.

  However, in the X-ray movable diaphragm 51 according to the present invention, the vertical opening / closing knob 47 having the same configuration as the vertical opening / closing knob 7 and the horizontal opening / closing knob 48 having the same configuration as the horizontal opening / closing knob 8 are also provided on the rear surface of the case 2 as shown in FIG. The rotary shaft 47A of the vertical opening / closing knob 47 has a plurality of vertical leaf wires 10 circumscribing the four pulleys 14 without sagging, as shown in FIG. The lateral leaf wire 11 circumscribing the four pulleys 9 is wound around the rotating shaft 48A of the lateral opening / closing knob 48 a plurality of times without sagging.

  The vertical leaf slider 12 is attached to the upper and lower sides of the rectangle formed by the vertical leaf wire 10 at positions that are substantially point-symmetric with respect to the center of the rectangle. On the left side and the right side, horizontal leaf sliders 13 are attached at positions that are substantially point-symmetric with respect to the center of the rectangle. As a result, when the vertical opening / closing knob 7 or 47 is rotated, the two vertical leaf sliders 12 slide to the left or right in the figure while maintaining a substantially point-symmetrical relationship with each other depending on the rotation direction. When 48 is rotated, the two horizontal leaf sliders 13 slide up or down in the figure while maintaining a substantially point-symmetrical relationship with each other in accordance with the direction of rotation.

  The vertical and horizontal widths of the X-ray rectangular irradiation range are adjusted by sliding the vertical leaf slider 12 and the horizontal leaf slider 13, both of which are adjusted by the same method. Now, the adjustment of the width by the two vertical leaves 17 will be described. A vertical leaf support arm 15 is centered about a fulcrum 16 shown in FIG. 2 on each surface that is parallel to both sides of the upper and lower sides of the rectangle formed by the vertical leaf wire 10 shown in FIG. The case 2 is rotatably supported. A rectangular vertical leaf 17 made of an X-ray absorber such as lead is provided at the end of each vertical leaf support arm 15 opposite to the fulcrum 16 so that the vertical leaf wire 10 is perpendicular to the vertical leaf support arm 15. Are attached in the direction of the inside of the rectangle formed.

  Further, the two vertical leaf sliders 12 have a cylindrical pin 12A which is perpendicular to itself and directed inward of the rectangle formed by the vertical leaf wire 10 at the center thereof. As shown in FIG. 2, each vertical leaf support arm 15 is provided with a long hole 18 having a width slightly wider than the diameter of the pin 12 </ b> A, and each pin 12 </ b> A of the two vertical leaf sliders 12 is provided. It arrange | positions so that it may pass through the long hole 18 of each vertical leaf support arm 15. FIG. With this structure, when the vertical opening / closing knob 7 or 47 is rotated to the left or right, the two vertical leaf sliders 12 slide, and the two vertical leaves 17 according to the rotation direction of the vertical opening / closing knob 7 or 47. Are moved in directions toward or away from each other on a circle centered on each fulcrum 16 to adjust the lateral width of the X-ray rectangular irradiation range.

  Since the knobs are arranged on both the front and rear surfaces of the X-ray movable diaphragm 51 with the above-described configuration, the operator can adjust the X-ray irradiation range from either the front or rear direction of the X-ray movable diaphragm 51. . Further, since the direction of turning the knob and the arrangement of the knob are the same on the front and rear surfaces, the device is easy to use for the operator.

  The present invention relates to an X-ray movable diaphragm used in an X-ray fluoroscopic apparatus.

It is a figure which shows the structural example of the X-ray movable aperture_diaphragm | restriction by this invention. It is a figure which shows the structural example of the X-ray movable aperture_diaphragm | restriction by this invention. It is a figure which shows the example of an external appearance of the X-ray movable aperture_diaphragm | restriction by this invention. It is a figure which shows the example which attached the X-ray movable diaphragm to the mobile X-ray imaging apparatus. It is a figure which shows the example of the conventional X-ray movable diaphragm. It is a figure which shows the structural example of the conventional X-ray movable aperture_diaphragm | restriction. It is a figure which shows another example of the conventional X-ray movable diaphragm.

Explanation of symbols

1: X-ray movable diaphragm 2: Case 3: Diaphragm rotating part 4: Hole 7: Vertical opening / closing knob 7A: Rotating shaft 8: Horizontal opening / closing knob 8A: Rotating shaft 9: Pulley 10: Vertical leaf wire 11: Horizontal leaf wire 12: Vertical leaf slider 12A: Pin 13: Horizontal leaf slider 14: Pulley 15: Vertical leaf support arm 16: Support point 17: Vertical leaf 18: Long hole 19: Connection shaft 20: Connection shaft 21: Horizontal leaf 30: Round-trip X-ray imaging apparatus 31: X-ray tube 32: Subject 33: Bed 34: Support column 35: X-ray tube holding arm 47: Vertical opening / closing knob 47A: Rotating shaft 48: Horizontal opening / closing knob 48A: Rotating shaft 51: X-ray Movable diaphragm

Claims (3)

X-ray movable including two sets of movable leaves for adjusting the X-ray irradiation range, two operation knobs for operating the two sets of movable leaf opening / closing mechanisms, and a case for storing the movable leaves In the diaphragm, on the surface opposite to the surface on which the two operation knobs of the case are attached, two other opening and closing mechanisms for the two sets of movable leaves are operated in the same manner as the two operation knobs. An X-ray movable diaphragm characterized in that an operation knob is provided, and operation knobs having the same function in two operation knobs provided on one and the other surface are arranged diagonally. A set of vertical leaves and a set of horizontal leaves for adjusting the X-ray irradiation range in the vertical direction and the horizontal direction; a first vertical opening / closing knob for operating the opening / closing mechanism of the set of vertical leaves; In an X-ray movable diaphragm provided with a first lateral opening / closing knob for operating a pair of lateral leaf opening / closing mechanisms and a case for storing these leaves, the two operation knobs of the case are attached. A second vertical opening / closing knob and a second horizontal opening / closing knob having the same function on the opposite surface are attached diagonally to the first vertical opening / closing knob and the second horizontal opening / closing knob, respectively. ,
A wire for a vertical leaf wound around the rotating shafts of the first and second vertical opening / closing knobs in opposite directions and attached on a loop via pulleys provided at four corners of the case;
The first and second lateral opening / closing knobs are wound around the rotation shafts in the opposite directions, and on the loop via pulleys provided at four corners different from the pulleys provided at the four corners of the case. The attached lateral leaf wire,
A pair of vertical leaf sliders which are attached to the vertical leaf wires so as to face each other and are brought into contact with the set of vertical leaves so as to open and close as the vertical leaf wires move. When,
A pair of horizontal leaf sliders that are attached to the lateral leaf wires so as to face each other and are brought into contact with the pair of lateral leaves so as to open and close as the lateral leaf wires move. When,
By providing
The vertical leaf is opened and closed by rotating one of the first and second vertical opening / closing knobs, and the horizontal leaf is opened / closed by rotating either the first or second horizontal opening / closing knob. An X-ray movable diaphragm characterized by being configured to do so. 3. A support column rotatably attached to a front portion, an X-ray tube holding arm attached to the support column, and an X-ray tube attached to a tip of the X-ray tube holding arm. The X-ray movable diaphragm is attached to the X-ray tube so that one of the surfaces provided with the knobs faces the longitudinal front portion of the X-ray tube holding arm and the other faces the rear portion. X-ray equipment for round trips.

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