JP4466415B2 - X-ray system with fluoroscopic function - Google Patents

Description

  The present invention relates to an X-ray tube holding apparatus that holds an X-ray tube apparatus in a vertically movable manner, an X-ray imaging system equipped with a fluoroscopic function, which includes an X-ray generator and an imaging table having a fluoroscopic light receiving function.

  In general, as shown in FIG. 6, for example, as shown in FIG. 6, X-ray imaging includes an X-ray tube holding device 1 that holds an X-ray tube device 2 so that it can move up and down, and an X-ray generator (in FIG. Only the tube apparatus 2 is shown, and the display of the entire X-ray generator is omitted.), And a horizontal imaging table 6 to which a bucky imaging device 5 for swinging the cassette 4 containing the film 3 is attached. When performing imaging, the operator sets the X-ray conditions (tube voltage, tube current, imaging time) obtained empirically for each imaging region in the X-ray generator and moves the X-ray tube device 2 up and down. Thus, the X-ray tube apparatus 2 is stopped at a height at which the distance between the focal point and the film, which is the distance between the X-ray tube focal point 7 and the film 3, becomes a distance suitable for imaging of about 1 m. Regarding the measurement of the distance between the focal point and the film, for example, the distance to the top plate surface of the horizontal imaging table 6 using the measure 8 attached at the same height as the X-ray tube focal point 7 on the side surface of the X-ray tube device 2. Is measured, and the distance from the top plate surface to the film surface, which is a known value for the operator, is added. Imaging by such a method in X-ray imaging is called general imaging.

  The most popular system for general radiography is the system described above, but imaging systems with a fluoroscopic function that can more reliably position the radiographic part by fluoroscopy before radiography are also widely used mainly in orthopedics. Has been. An example of an imaging system having a fluoroscopic function is shown in FIG. In the photographing system having no fluoroscopic function shown in FIG. 6, the Bucky photographing device 5 is fixed at a predetermined position on the horizontal photographing stand 6, whereas in the photographing system having the fluoroscopic function, the Bucky photographing device 5 is horizontal. It is held on the back surface of the top plate of the imaging stand 6 in a state in which it can move horizontally in the longitudinal direction.

  Thereby, at the time of fluoroscopy, the operator can retract the Bucky imaging device 5 to a position where a part of the device is in contact with the retraction position check sensor 9 to prevent the film 3 from being exposed to X-rays at the time of fluoroscopy. When fluoroscopy is performed in this state, an image intensifier 10 (hereinafter abbreviated as II) installed so that the center of the X-ray irradiation field and the center of the light receiving surface substantially coincide with each other via the optical system 11. Since the monitor device 14 that receives the TV camera 12 and the output video signal of the TV camera 12 attached via the cable 13 and displays the perspective image in the vicinity of the horizontal photographing stand 6 can be observed. The operator can position the patient more appropriately while viewing the fluoroscopic image. The retracted position confirmation sensor 9 is constituted by a micro switch or the like, for example, and generates a position detection signal when a part of the bucky photographing device 5 comes into contact. This signal is one of the permission conditions for X-ray generation during fluoroscopy for the X-ray generator.

  After completing the positioning of the patient under fluoroscopy, the operator moves the Bucky imaging device 5 to the imaging position and performs imaging. A position confirmation signal generated when the Bucky imaging device 5 moves to the imaging position and contacts the imaging position confirmation sensor 15 is one of the permission conditions for X-ray generation during imaging for the X-ray generator.

  Even in the imaging system having the above-described fluoroscopic function, the X-ray tube apparatus 2 must be arranged so that the distance between the focal point and the film is usually a distance suitable for imaging of about 1 m, as can be seen from FIG. In addition, the II light receiving surface 16 is below the surface of the film 3. Therefore, if the distance between the II light receiving surface 16 and the surface of the film 3 is 10 cm, for example, and the distance between the focal point and the film is 1 m, the distance between the focal point and the II light receiving surface is 1.1 m. Since the intensity of the X-ray generated from the X-ray tube focal point 7 attenuates in proportion to the square of the distance, the focus / II light reception is obtained from the relationship with the X-ray detection efficiency when the light is received by the generally used II. In order to obtain a fluoroscopic image having an image quality necessary for positioning in a state where the distance between surfaces exceeds 1 m, the fluoroscopic power must be made larger than usual. As a result, heat accumulation in the X-ray tube anode during fluoroscopy becomes larger than usual, and there is a disadvantage that X-ray conditions for imaging performed immediately after that must be reduced from usual.

  For this reason, in a photographing system having a fluoroscopic function, it is common to make the focal point / film distance during photographing equal to the focal point / II light receiving surface distance during fluoroscopy. That is, after the operator determines the focal point / film distance at the time of photographing, the operator lowers the X-ray tube device 2 to a position where the distance between the focal point / II light receiving surface becomes the same as the focal point / film distance at the time of photographing. After that, the X-ray tube apparatus 2 is raised to a position where the intended focal point / film distance is reached, and imaging is performed. In this case, the operator considers the distances from the top plate surface to the surface of the film 3 and the II light receiving surface 16 which are known values, and is positioned at the same height as the X-ray tube focal point 7 on the side surface of the X-ray tube device 2. The height at which the X-ray tube apparatus 2 is stationary is determined by measuring the distance between the X-ray tube focal point 7 and the top plate surface for each of fluoroscopy and radiographing using the attached measure 8.

  An X-ray tube holding device having an automatic position detection function may be used to save the distance measurement work using the measure 8 (see, for example, Patent Document 1). An example of the automatic position detection function will be described below with reference to FIGS. FIG. 8 is a diagram for explaining the configuration of the position detection mechanism 17, and FIG. 9 is a block diagram of the position calculation display unit 18.

  The automatic position detection function includes a position detection mechanism 17 that converts position information in the height direction of the X-ray tube apparatus 2 held by the X-ray tube holding apparatus 1 shown in FIG. 8 into an electric signal, and an electric signal obtained thereby. It is comprised by the position calculation display part 18 which converts into the positional information of a height direction, and displays it.

  As shown in FIG. 8, the position detection mechanism 17 balances the weight of the X-ray tube device 2 within the support column 20 of the X-ray tube holding device 1 and moves the X-ray tube device 2 to an arbitrary height within a vertically movable range. Therefore, the rotation amount of the movable pulley 19c constituting the balance mechanism 19 together with the balance weight 19a, the fixed pulley 19b, the wire fixing portion 19d, and the wire 19e is proportional to the amount of displacement in the height direction of the X-ray tube device 2. This value is converted into an electric signal.

  The central axis of the movable pulley 19c is rotatably held in the vicinity of the lower end portion of the support column 20, and a small gear 17a is coaxially fixed to an extension portion of the center shaft to the outside of the support column 20. The small gear 17a meshes with a large gear 17b having a larger number of teeth in order to reduce and transmit the rotation of the small gear 17a. With the above configuration, the amount of displacement in the height direction of the X-ray tube device 2 is obtained as the output voltage of the slider of the potentiometer 17c, and this becomes the input signal of the position calculation display unit 18.

  The position calculation display unit 18 is built in a housing integrally attached to the X-ray tube holding device 1 in the X-ray tube holding device 1, and a position indicator 18a for displaying the position is attached to the panel surface of the housing. It has been. Next, the distance calculation display function will be described with reference to FIG. 9 is for supplying a reference voltage to both ends of the resistance of the potentiometer 17c.

  At the time of system installation, the service person moves the X-ray tube apparatus 2 shown in FIG. 7 up and down so that the X-ray tube focal point 7 is at the same height as the surface of the film 3 of the horizontal imaging table 6. The output voltage V0 (V) of the potentiometer 17c shown in FIG. 9 is measured with a voltmeter or the like and set to the dip switch 18f. Next, the service person stops the X-ray tube apparatus 2 at the upper limit position of the movable range in the vertical direction, measures the output voltage VL (V) of the potentiometer 17c at that time, and sets the dip switch 18g. At this time, the distance L (m) between the surface of the X-ray tube focal point 7 and the surface of the film 3 is measured by a measure 8 or the like and set to the dip switch 18e. The dip switches 18e, 18f, and 18g are all connected to a bus line of a computer system that will be described later via an input / output port (not shown).

Thereafter, the output voltage VX (V) of the potentiometer 17c is converted into a digital value by the AD converter 18b, and is read into a computer system including a CPU 18c such as a microcomputer, and a memory 18d including a PROM and a RAM. The CPU 18c repeats the calculation shown in Expression (1) using this value, V0 (V) read from the dip switch 18f, VL (V) read from the dip switch 18g, and L (m) read from the dip switch 18e. The focus / film distance X (m) at that time is always calculated with respect to the vertical movement of the X-ray tube apparatus 2, and the position of the focus with reference to the film surface is displayed on the position indicator 18a.
X = L * (VX−V0) / (VL−V0) Formula (1)

When imaging is performed by the X-ray imaging system including the X-ray tube holding device 1 having the automatic position detecting function as described above, the imaging table having the fluoroscopic light receiving function, and the X-ray generator, the operator focuses on the imaging. After determining the shooting distance XR (m), which is the distance between the films, the difference (XR−α) between the distance α (m) between the surface of the film 3 and the II light receiving surface 16 determined by the photographing table having the fluoroscopic light receiving function ), And the X-ray tube apparatus 2 is lowered to a height at which the display X of the position indicator 18a becomes this value, that is, (XR-α), to perform fluoroscopy. After completing the positioning by fluoroscopy, the operator raises the X-ray tube apparatus 2 to a height at which the display X of the position indicator 18a becomes XR and performs imaging. As a result, the operator is freed from the troublesome distance measurement by the measure 8 or the like.
Japanese Patent Laid-Open No. 9-10196

  By using the X-ray tube holding device having the automatic position detection function as described above, the operator is freed from the troublesome distance measurement by a measure or the like. And the distance between the light receiving surfaces must be subtracted, and the shooting distance must be stored even during fluoroscopy. In view of the above circumstances, in the X-ray imaging system with a fluoroscopic function in which positioning by fluoroscopy is performed before imaging, the present invention makes it cumbersome for the operator to calculate the imaging distance and the distance between the film and the II light receiving surface every time imaging is performed. It is an object of the present invention to eliminate the hassle of storing the shooting distance during fluoroscopy.

For a first aspect of the present invention to achieve the above object, holding the X-ray tube apparatus, the imaging table having an imaging detector and fluoroscopic detector, a vertically movable X-ray tube device, and In an X-ray imaging system equipped with a fluoroscopic function, the X-ray imaging system includes an X-ray tube holding device having position detection means for detecting the vertical position of the X-ray tube focal point with reference to the imaging light receiving surface of the imaging detector. An imaging position setting means for setting the position of the X-ray tube focal point at the time with reference to the imaging light receiving surface, and that the position detected by the position detection means matches the position set by the imaging position setting means. An imaging position notifying unit for notifying, and a position close to the imaging light receiving surface by a distance in a height direction between the fluoroscopic light receiving surface of the fluoroscopic detector and the imaging light receiving surface is set from the position set in the imaging position setting unit. Perspective position setting means A fluoroscopy function-equipped X-ray imaging system is provided, comprising fluoroscopy position notification means for notifying that the position detected by the position detection means coincides with the position set by the fluoroscopy position setting means. To do.

In order to achieve the above object, the invention according to claim 2 holds an X-ray tube device , an imaging table having an imaging detector and a fluoroscopic detector, and the X-ray tube device movably up and down. And a fluoroscopic function-equipped X-ray imaging system including an X-ray tube holding device having position detection means for detecting the vertical position of the X-ray tube focal point with reference to the imaging light receiving surface of the imaging detector. An imaging position input means for inputting the position detected by the position detection means as an imaging position, an imaging position storage means for storing the imaging position input by the imaging position input means, and a position detected by the position detection means distance setting but to set the distance of the photographing position and a position stored in the storage means and the photographing position notification means for notifying that matches the height direction of the perspective light receiving surface of the imaging light receiving surface and the fluoroscopic detector Means for calculating a position close to the photographing light receiving surface by a distance set in the distance setting means from a position stored in the photographing position storage means, and a position detected by the position detecting means. A fluoroscopy function-equipped X-ray imaging system is provided, characterized in that fluoroscopy position notifying means for notifying that the output coincides with the output of the arithmetic means is provided.

In order to achieve the above object, the invention according to claim 3 holds an X-ray tube device , an imaging table having an imaging detector and a fluoroscopic detector, and the X-ray tube device movably up and down. And X position detectors for detecting the vertical position of the X-ray tube focal point with reference to the fluoroscopic light receiving surface of the fluoroscopic detector.
In a fluoroscopy-equipped X-ray imaging system comprising a tube holding device, an imaging position setting means for setting a position of an X-ray tube focal point at the time of imaging with reference to the fluoroscopic light receiving surface, and detection by the position detection means A shooting position notifying means for notifying that the position set by the shooting position setting means matches, and shooting of the fluoroscopic light receiving surface and the shooting detector from the position set in the shooting position setting means. A fluoroscopy position setting means for setting a position close to the fluoroscopic light receiving surface by a distance in the height direction of the light receiving surface, and that the position detected by the position detection means matches the position set by the fluoroscopic position setting means. A fluoroscopic function-equipped X-ray imaging system is provided, which is provided with a fluoroscopy position notification means for notification.

And X-ray tube apparatus, the image capturing base and, vertically movably holding the X-ray tube apparatus, and the fluoroscopic detector the vertical position of the X-ray tube focal point with imaging detector and fluoroscopic detector In a fluoroscopic function-equipped X-ray imaging system comprising an X-ray tube holding device having a position detecting means for detecting with reference to the fluoroscopic light receiving surface, the position detected by the position detecting means is input as an imaging position. A position input unit, a shooting position storage unit that stores the shooting position input by the shooting position input unit, and a position detected by the position detection unit matches a position stored in the shooting position storage unit. a photographing position notification means for notifying, the imaging light receiving surface of the imaging detector and the distance setting means for setting the distance in the height direction of the transparent light-receiving surface, position stored in the imaging position storage means A calculation unit that calculates a position closer to the fluoroscopic light receiving surface by a distance set in the distance setting unit, and a fluoroscopic position that notifies that the position detected by the position detection unit matches the output of the calculation unit Provided is a fluoroscopic X-ray imaging system equipped with a notification means.

  According to a fifth aspect of the present invention, in the first to fourth aspects, the photographing position notifying means and the perspective position notifying means are a display device such as a lamp or a character display device or a sound device such as a buzzer or a sound generator. A type X-ray imaging system is provided.

  A sixth aspect of the present invention provides a fluoroscopic function-equipped X-ray imaging system according to the first to fourth aspects, wherein the imaging position notification means and the perspective position notification means are a brake mechanism.

  According to the present invention, positioning is performed under fluoroscopy using an X-ray tube holding apparatus having an automatic distance measuring function, an imaging table having a fluoroscopic light receiving function, and an X-ray imaging system equipped with a fluoroscopy function. When post-shooting is performed, it is possible to eliminate the troublesomeness of the operator to calculate the shooting distance and the distance between the film and the II light-receiving surface every time shooting is performed, and the troublesomeness of storing the shooting distance during fluoroscopy.

  In the inventions of claims 1 and 3, the shooting distance is fixed at the time of installation, whereas in the inventions of claims 2 and 4, the shooting distance can be freely determined by the operator at every shooting.

  Examples of the first and second aspects of the invention are shown in Example 1 and Example 2, respectively.

  An embodiment of claim 1 of the present invention will be described with reference to FIGS. FIG. 1 shows a position detection mechanism 17 and a position calculation display unit 21 that use a part of the balance mechanism 19 housed inside the X-ray tube holding device 1. Since it is the same as that described in the section, the description is omitted here. As for the position calculation display unit 21 attached to the X-ray tube holding device 1 integrally with the X-ray tube device 2, two LEDs are added to the panel surface of the position calculation display unit 18 in FIG.

  FIG. 2 is a block diagram of the position calculation display unit 21. At the time of system installation, the service person applies to the dip switches 21e, 21f, and 21g, respectively, as in the case of the dip switches 18e, 18f, and 18g in FIG. The output voltage V0 (V) of the potentiometer 17c when the focal point is on the film surface and the output voltage VL (V) of the potentiometer 17c when the focal point is at the upper limit height are set. Further, the serviceman sets the distance α (m) between the film surface and the II light receiving surface and the photographing distance XR (m), which is the distance between the focal point and the film at the time of photographing, in the dip switches 21m and 21n provided according to the present invention. The dip switches 21e, 21f, 21g, 21m, and 21n are all connected to a bus line of a computer system that includes a CPU 21c and a memory 21d via an input / output port (not shown).

  When the power of the position calculation display unit 21 is turned on after the installation is completed, the CPU 21c converts the output voltage VX (V) of the potentiometer 17c into a digital value by the AD converter 21b, as described in the background section. A value is read, and using this value and V0 (V) read from the dip switch 21f, VL (V) read from the dip switch 21g, and L (m) read from the dip switch 21e, the calculation shown in Expression (1) is performed. Repeatedly, the focus / film distance X (m) at that time is always calculated with respect to the vertical movement of the X-ray tube apparatus 2, and the focus position based on the film surface is displayed on the position indicator 21a. The DC stabilized power supply 21h is for supplying a reference voltage to both ends of the resistance of the potentiometer 17c.

  The CPU 21c repeats the calculation of the expression (1) and the display of the result as described above, and the focal distance / film distance X (m) calculated by the expression (1) and the shooting distance XR (set to the dip switch 21n). m) and the distance obtained by subtracting the distance α (m) between the film surface and the II light receiving surface from the photographing distance XR (m), that is, the comparison with (XR−α), and when X matches XR The height instruction LED 21k is turned on, and when it matches (XR-α), the perspective height instruction LED 21j is turned on. The operator performs the fluoroscopy by stopping the X-ray tube apparatus 2 at a height at which the fluoroscopic height instruction LED 21j is turned on, and then raises the X-ray tube apparatus 2 to a height at which the imaging height instruction LED 21k is lit. . As a result, the operator is freed from the hassle of calculating the shooting distance and the distance between the film and the II light receiving surface every time shooting is performed, and the hassle of storing the shooting distance during fluoroscopy.

  In the above embodiment, corresponding to claim 1, the dip switches 21e, 21f, and 21g are provided with the focus upper limit height L (m) measured from the film surface, and the output voltage V0 of the potentiometer 17c when the focus is on the film surface. (V), the output voltage VL (V) of the potentiometer 17c when the focal point is at the upper limit height is set, and the distance α (m) between the film surface and the II light receiving surface and the focal point at the time of photographing are set in the dip switches 21m and 21n, respectively. The shooting distance XR (m), which is the distance between the films, is set. In correspondence with claim 3, the dip switches 21e, 21f, and 21g have the focal point upper limit height L (m) measured from the II light receiving surface and the focal point. II Set the output voltage V0 (V) of the potentiometer 17c when on the light receiving surface, and the output voltage VL (V) of the potentiometer 17c when the focal point is at the upper limit height. , Setting the distance each dip switches 21m and 21n film surface and II receiving surface alpha (m) and shooting distance XR as focal · II-receiving surface distance at the time of photographing (m) The same effect can be obtained.

  Next, a second embodiment of the present invention will be described with reference to FIGS. The configuration and function of the position detection mechanism 17 of FIG. 3 and the function of the position calculation display unit 21 displaying the focal point / film distance X (m) on the position indicator 21a are as described in the first embodiment. At times, a serviceman applies the dip switches 21e, 21f, and 21g of FIG. 4 to the focal point upper limit height L (m) measured from the film surface, the output voltage V0 (V) of the potentiometer 17c when the focal point is on the film surface, and the focal point. The output voltage VL (V) of the potentiometer 17c when it is at the upper limit height is set, and the distance α (m) between the film surface and the II light receiving surface is set for the dip switch 21m. The dip switches 21e, 21f, 21g, and 21m are all connected to the bus line of the computer system via input / output ports (not shown). The DC stabilized power supply 21h is for supplying a reference voltage to both ends of the resistance of the potentiometer 17c.

  The operator first sets the photographing distance XR (m) before performing fluoroscopy for positioning. For this purpose, the operator moves the X-ray tube device 2 up and down while looking at the display on the position indicator 21a, and stops the display at a position where the display matches the intended photographing distance XR. When the operator presses the height designation button 21i in this state, the CPU 21c stores the focal point / II light receiving surface distance X displayed on the position indicator 21a at this time, that is, XR, in the memory 21d as the photographing distance.

  The CPU 21c repeats the calculation of the expression (1) and the display of the result as described in the first embodiment, and also the focal distance / II light receiving surface distance X calculated by the expression (1) and the photographing distance XR stored in the memory 21d. And the distance obtained by subtracting the distance α between the film surface set on the dip switch 21m and the II light receiving surface from the photographing distance XR, ie, (XR−α), and when X matches XR The height instruction LED 21k is turned on, and when it matches (XR-α), the perspective height instruction LED 21j is turned on. As a result, when the operator presses the height designation button 21i to set the shooting distance XR as described above, the shooting height instruction LED 21k is lit because the distance X between the focal point and the II light receiving surface coincides with the shooting distance XR.

  Thereafter, when the operator lowers the X-ray tube device 2 to perform fluoroscopy, the imaging height instruction LED 21k is extinguished, and the distance X between the focal point and the II light receiving surface is the distance α between the film surface and the II light receiving surface from the imaging distance XR. When the distance (XR−α) is the same as the subtracted distance, the fluoroscopy height instruction LED 21j is turned on, and this is confirmed and the X-ray tube apparatus 2 is stopped. The operator performs fluoroscopy in this state, and then raises the X-ray tube apparatus 2 to a height at which the imaging height instruction LED 21k is lit, and performs imaging. As a result, the operator is freed from the hassle of calculating the shooting distance and the distance between the film and the II light receiving surface every time shooting is performed, and the hassle of storing the shooting distance during fluoroscopy.

  In the above embodiment, corresponding to claim 2, the dip switches 21e, 21f, and 21g are provided with a focus upper limit height L (m) measured from the film surface, and the output voltage V0 of the potentiometer 17c when the focus is on the film surface. (V), the output voltage VL (V) of the potentiometer 17c when the focal point is at the upper limit height is set, and the distance α (m) between the film surface and the II light receiving surface is set in the dip switch 21m. Corresponding to the dip switches 21e, 21f and 21g, the focus upper limit height L (m) measured from the II light receiving surface, the output voltage V0 (V) of the potentiometer 17c when the focus is on the II light receiving surface, and the focus is the upper limit. Even if the output voltage VL (V) of the potentiometer 17c at the height is set and the distance α (m) between the film surface and the II light receiving surface is set to the dip switch 21m, the same applies. The same effect can be obtained.

  The above is the description of the first and second embodiments of the present invention. In these examples, when the focal point / film distance X coincides with the photographing distance XR, the photographing height instruction LED 21k is turned on, and the film is obtained from the photographing distance XR. The fluoroscopic height indicating LED 21j is turned on when it coincides with the distance (XR-α) obtained by subtracting the distance α between the surface and the II light receiving surface, but instead of these two types of alarm sounds, melodies and voices that can be identified The operator may be notified by a sound or a sentence display.

  Alternatively, instead of providing a brake mechanism in the vertical movement mechanism of the X-ray tube holding device and lighting the imaging height instruction LED 21k or the fluoroscopic height instruction LED 21j, the vertical movement of the X-ray tube device is locked and the operator is made to lock it. You may let me know. An example of a brake mechanism for this purpose is shown in FIG. FIG. 5A is a diagram showing that the X-ray tube holding device 1 is composed of an upper fixed column 22 in which vertical movement is fixed and a lower movable column 23 that slides in the vertical direction. FIG. 5B is a transverse cross section of the X-ray tube holding device 1, and the groove inside the movable column 23 can be slid by the bearing 24 attached to the fixed column 22, and is attached to the movable column 23. A structure is shown in which the movable support 23 slides in the vertical direction inside the fixed support 22 by the structure in which the rail 27 is sandwiched by the bearing 25 attached to the fixed support 22. FIG. 5C is a diagram showing a brake mechanism, in which a brake material 26 having a high friction coefficient is pressed against a rail 27 through a fulcrum by a tension spring.

  When the brake mechanism shown in FIG. 5 is used instead of the photographing height instruction LED 21k or the perspective height instruction LED 21j, a lock release push button (not shown) is provided on the panel surface of the position calculation display unit 21 shown in FIG. Is provided. The CPU 21c shown in FIG. 2 or FIG. 4 is any of the distance (XR−α) obtained by subtracting the distance α (m) between the film surface and the II light receiving surface from the photographing distance XR or the photographing distance XR (m). Only when the lock release push button is not pressed, the drive of the solenoid 28 is turned off, the brake is applied, and the vertical movement is locked. In other cases, the drive of the solenoid 28 is turned on, and the vertical movement lock is released. Therefore, when the focal length / film distance X does not coincide with any of the distance (XR-α) obtained by subtracting the distance α (m) between the film surface and the II light receiving surface from the photographing distance XR or the photographing distance XR (m). Even if the up-and-down movement is locked in accordance with any of them, the lock is released if the unlock button is pressed.

  The present invention relates to an X-ray tube holding apparatus that holds an X-ray tube apparatus in a vertically movable manner, an X-ray imaging system equipped with a fluoroscopic function, which includes an X-ray generator and an imaging table having a fluoroscopic light receiving function.

FIG. 2 is a mechanism diagram for explaining the first embodiment of the present invention. The block diagram of the position calculation display part for demonstrating Example 1 of this invention. FIG. 6 is a mechanism diagram for explaining a second embodiment of the present invention. The block diagram of the position calculation display part for demonstrating Example 2 of this invention. The figure for demonstrating the brake mechanism with respect to the vertical motion of an X-ray tube apparatus. The figure for demonstrating the method of general imaging | photography. The figure for demonstrating the imaging | photography method by a fluoroscopy function-equipped X-ray imaging system. The mechanism figure for demonstrating an automatic position detection function. The block diagram for demonstrating the function of a position calculation display part.

Explanation of symbols

1: X-ray tube holding device 2: X-ray tube device 3: Film 4: Cassette 5: Bucky imaging device 6: Horizontal imaging table 7: X-ray tube focus 8: Measure 9: Retraction position confirmation sensor 10: Image intensifier 11: Optical system 12: TV camera 13: Cable 14: Monitor device 15: Shooting position confirmation sensor 16: II light receiving surface 17: Position detection mechanism 17a: Small gear 17b: Large gear 17c: Potentiometer 18: Position calculation display unit 18a: Position indicator 18b: AD converter 18c: CPU
18d: memory 18e: dip switch 18f: dip switch 18g: dip switch 18h: DC stabilized power supply 19: balance mechanism 19a: balance weight 19b: fixed pulley 19c: moving pulley 19d: wire fixing portion 19e: wire 20: support 21: Position calculation display unit 21a: Position display 21b: AD converter 21c: CPU
21d: Memory 21e: Dip switch 21f: Dip switch 21g: Dip switch 21h: DC stabilized power supply 21i: Height designation button 21j: Perspective height instruction LED
21k: Shooting height instruction LED
22: fixed support 23: movable support 24: bearing 25: bearing 26: brake material 27: rail 28: solenoid

Claims (6)

An X-ray tube device , an imaging table having an imaging detector and a fluoroscopic detector, an X-ray tube device that can move up and down, and the position of the X-ray tube focal point in the vertical direction of the imaging detector In a fluoroscopy-equipped X-ray imaging system including an X-ray tube holding device having position detection means for detecting an imaging light receiving surface as a reference, a position of the X-ray tube focal point at the time of imaging relative to the imaging light receiving surface Is set in the shooting position setting means, the shooting position notifying means for notifying that the position detected by the position detecting means matches the position set by the shooting position setting means, and the shooting position setting means. A fluoroscopic position setting means for setting a position closer to the photographing light receiving surface by a distance in a height direction between the fluoroscopic light receiving surface of the fluoroscopic detector and the photographing light receiving surface from the position, and a position detected by the position detecting means. Said transparent Perspective featuring X-ray imaging system, characterized in that a perspective position notification means for notifying that matches the position set by the position setting means. And X-ray tube apparatus, the image capturing base and, vertically movably holding the X-ray tube device, and the imaging detector the vertical position of the X-ray tube focal point with imaging detector and fluoroscopic detector In a fluoroscopic X-ray imaging system equipped with a fluoroscopy function, comprising an X-ray tube holding device having a position detection means for detecting with respect to the imaging light receiving surface as a reference, the position detected by the position detection means is inputted as an imaging position. A position input unit, a shooting position storage unit that stores the shooting position input by the shooting position input unit, and a position detected by the position detection unit matches a position stored in the shooting position storage unit. a photographing position notification means for notifying, the imaging light receiving surface and the distance setting means for the setting the distance in the height direction of the perspective light receiving surface of the fluoroscopic detector position stored in the imaging position storage means A calculation unit that calculates a position closer to the photographing light receiving surface by a distance set in the distance setting unit, and a fluoroscopic position that notifies that the position detected by the position detection unit matches the output of the calculation unit A fluoroscopic-equipped X-ray imaging system, characterized in that a notification means is provided. And X-ray tube apparatus, the image capturing base and, vertically movably holding the X-ray tube apparatus, and the fluoroscopic detector the vertical position of the X-ray tube focal point with imaging detector and fluoroscopic detector X having position detecting means for detecting with reference to the fluoroscopic light receiving surface
In a fluoroscopy-equipped X-ray imaging system comprising a tube holding device, an imaging position setting means for setting a position of an X-ray tube focal point at the time of imaging with reference to the fluoroscopic light receiving surface, and detection by the position detection means A shooting position notifying means for notifying that the position set by the shooting position setting means matches, and shooting of the fluoroscopic light receiving surface and the shooting detector from the position set in the shooting position setting means. A fluoroscopy position setting means for setting a position close to the fluoroscopic light receiving surface by a distance in the height direction of the light receiving surface, and that the position detected by the position detection means matches the position set by the fluoroscopic position setting means. A fluoroscopic function-equipped type X characterized by providing a fluoroscopy position notifying means for notifying
X-ray system. And X-ray tube apparatus, the image capturing base and, vertically movably holding the X-ray tube apparatus, and the fluoroscopic detector the vertical position of the X-ray tube focal point with imaging detector and fluoroscopic detector X-ray tube-equipped X-ray tube holding device having position detecting means for detecting with reference to the fluoroscopic light receiving surface
In the line imaging system, an imaging position input means for inputting a position detected by the position detection means as an imaging position, an imaging position storage means for storing an imaging position input by the imaging position input means, and the position detection means A photographing position notifying means for notifying that the position detected by the photographing position storage means coincides with the position stored in the photographing position storing means, and the distance in the height direction between the photographing light receiving surface of the photographing detector and the fluoroscopic light receiving surface. A distance setting means for setting the position, a calculation means for calculating a position close to the fluoroscopic light receiving surface by a distance set in the distance setting means from a position stored in the photographing position storage means, and a position detection means A fluoroscopy function-equipped X-ray imaging system provided with fluoroscopy position notification means for notifying that the detected position matches the output of the calculation means 5. The fluoroscopic function-equipped X according to claim 1, wherein the photographing position notifying means and the fluoroscopic position notifying means are a display device such as a lamp or a character display device or an acoustic device such as a buzzer or a sound generator.
X-ray system. 5. The fluoroscopic function-equipped X-ray imaging system according to claim 1, wherein the imaging position notification means and the fluoroscopy position notification means are a brake mechanism.

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