JP2012239534A - X-ray fluoroscopic table - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an X-ray fluoroscopic table allowing a user to check a safety function at the time of a failure of a single body.SOLUTION: This X-ray fluoroscopic table includes: a fluoroscopic table 102 on which a subject 101 is placed; an X-ray tube device for applying an X ray to the subject 101; an X-ray detector for detecting the X ray transmitting through the subject; an X-ray high voltage device for supplying the X-ray tube device with an electric power; a console 104 for operating the devices; a support part 109 for supporting the fluoroscopic table 102 movably in the direction of the body height of the subject 101; and a plurality of steps of safety mechanisms (105, 106, and 107) having different movable ranges to which the fluoroscopic table 102 is moved with respect to the support part 109. This X-ray fluoroscopic table further includes a control device 103 that, when an operation check is performed on an arbitrary safety mechanism of the plurality of steps of safety mechanisms (105, 106 and 107), deactuates a safety mechanism to which a movable range smaller than the arbitrary safety mechanism is set.

Description

  The present invention relates to an X-ray fluoroscopic table, and more particularly to a technique for recognizing an abnormal part of an X-ray fluoroscopic table.

A conventional X-ray fluoroscopic table is described in Patent Document 1.
Patent Document 1 discloses means for irradiating a subject with X-rays to perform X-ray fluoroscopy and imaging, display means for displaying an X-ray fluoroscopic image obtained by X-ray fluoroscopy and imaging on a monitor, and an apparatus A normal operation allowable range is set in advance, an abnormality detection means for detecting that the operation of the apparatus is abnormal when the allowable range is exceeded, and a control means for stopping the operation of the apparatus based on the output of the abnormality detection means X-ray fluoroscopic apparatus having an abnormality display means for displaying an abnormal part on the monitor based on an output of the abnormality detection means, so that an operator or a surgical operation can quickly detect that an abnormality has occurred. It is intended to provide an X-ray fluoroscopic apparatus that can be communicated to a person.

JP-A-8-336526

  However, Patent Document 1 discloses a method of confirming a component that operates when a position detection component failure (hereinafter referred to as a single failure) such as an encoder / microswitch provided in a normal fluoroscopic imaging table occurs. I think that it was not possible to establish a method for confirming the double-triple safety mechanism of X-ray fluoroscopes.

  Accordingly, an object of the present invention is to provide an X-ray fluoroscopic imaging table that can confirm a safety function in the event of a single failure.

  The purpose is to provide a fluoroscopic table for placing the subject, an X-ray tube device for irradiating the subject with X-rays, an X-ray detector for detecting the transmitted X-rays of the subject, and the X-ray detector. An X-ray high-voltage device that supplies power to the tube apparatus, a console for operating these devices, a support unit that supports the fluoroscopic table so as to be movable in the height direction of the subject, and the support unit An X-ray fluoroscopic imaging table comprising: a position detection unit for detecting the position of the fluoroscopic table; and a multi-stage safety mechanism having different movable ranges in which the fluoroscopic table moves relative to the support unit. An X-ray comprising a control unit that deactivates a safety mechanism in which a movable range narrower than the arbitrary safety mechanism is set when performing an operation check on any of the safety mechanisms. Achievable with a fluoroscopic table.

  ADVANTAGE OF THE INVENTION According to this invention, the X-ray fluoroscopic imaging stand which can confirm the safety function at the time of a single failure can be provided.

The block diagram which shows the structural example of the X-ray fluoroscopy table employ | adopted as each Example of this invention. FIG. 2 is a block diagram showing the main part of the X-ray fluoroscopic imaging table in FIG. 3 is a flowchart showing soft limit processing according to the first embodiment. 3 is a flowchart showing processing of the microswitch according to the first embodiment. 3 is a flowchart showing processing of a mechanical stopper according to the first embodiment. 10 is a flowchart showing processing of the remote console according to the second embodiment.

  The present invention will be described below with reference to the drawings. FIG. 1 is a configuration diagram showing a configuration example of an X-ray fluoroscopic imaging table adopted in each embodiment of the present invention.

  The X-ray fluoroscopic imaging table integrates these devices with an X-ray tube device 401 that generates X-rays irradiated to the subject 101, an X-ray high-voltage device 301 that supplies power to the X-ray tube device 401, and these devices. And a remote control console 104 to be operated. The subject 101 is supported by a table called a fluoroscopic table that is horizontal to the floor surface when standing and is perpendicular to the floor surface when standing.

  Among the devices constituting the fluoroscopic imaging table, the X-ray fluoroscopic imaging table 102 and the X-ray high-voltage device 301 are installed in the imaging room 100 for performing fluoroscopic imaging of the subject 101, and the remote control console 104 is used for imaging. It is installed in the operation room 200 adjacent to the room 100.

  The operation room 200 has a structure capable of shielding X-rays generated in the radiographing room 100, and prevents X-ray exposure of the examinee to the operator 201 who operates the fluoroscopic imaging table 102. is doing.

  In addition, a window 200W is provided between the shooting room 100 and the operation room 200 so that the operation room 200 can monitor the state of the shooting room 100. It is composed of glass containing lead so that X-rays from 100 can be shielded.

  The X-ray high voltage apparatus 301 supplies power to the X-ray tube apparatus 401 based on the X-ray intensity and irradiation interval information input to the remote console 104. The supplied power includes the tube voltage (voltage applied between the anode and cathode of the X-ray tube) corresponding to fluoroscopy or imaging of the X-ray high-voltage device 301, and the tube current (between the anode and cathode of the X-ray tube). Current).

  Further, the X-ray fluoroscopic imaging table 102 includes an X-ray tube device 401 that irradiates the subject 101 with X-rays, a support column 50 that is supported by the support frame 30 and supports the X-ray tube device 401, and the support frame 30. X-ray detection using a fluorescence intensifier tube (imaging intifier) or a flat panel detector (FPD) that detects X-rays that pass through the subject 101 and that is placed inside the X-ray tube device 401 And a container 70.

  FIG. 2 is a block diagram showing the main part of the X-ray fluoroscopic table of FIG. Reference numeral 101 is a subject, 102 is an X-ray fluoroscopic imaging table (fluoroscopic table), 103 is a control device, 104 is a remote console, 105 is a soft limit of a driving system, 106 is a micro switch for position detection, 107 is A mechanical stopper (or a mechanism equivalent thereto), 108 is a signal generator (abnormality display means), and 109 is a support unit that supports the fluoroscopic table 102 so as to be horizontally movable on the floor surface in the height direction of the subject 102, for example.

The X-ray fluoroscopic table usually performs the following operations.
The control device 103 operates the X-ray fluoroscopic imaging table 102 based on the operation signal input from the remote console 104. At this time, the position and inclination angle of the movable part of the X-ray fluoroscopic imaging table 102 are output to the position information control device 103 using a rotary encoder or a potentiometer (not shown). The position of X-ray fluoroscope table 102 is within the limit of the normal allowable range (hereinafter referred to as drive system soft limit 105), and X-ray fluoroscope table 102 is out of the range of drive system soft limit 105 as a safety function. In addition, a micro switch 106 for position detection and a mechanical stopper 107 are mounted. The micro switch 106 for position detection and the mechanical stopper 107 are for dealing with unintended operation / abnormality of the X-ray fluoroscopic table 102, and are indispensable for safely using the X-ray fluoroscopic table.

  In the first embodiment, a procedure for mounting the single failure mode in the control device 103 and confirming the first safety mechanism will be described with reference to FIG. FIG. 3 is a flowchart illustrating soft limit processing according to the first embodiment.

Step S301 (Part status check mode ON)
The control unit 103 starts the component state confirmation mode.

Step S302 (Operation signal calculation)
The control unit 103 calculates the position of the soft limit 105 in a pseudo manner. Each axis of the X-ray fluoroscopic imaging table 102 is operated using the remote operation console 104 or automatic operation control incorporated in the control device 103 in advance.

Step S303 (Soft limit detection?)
The control unit 103 determines whether or not the soft limit 105 has been normally detected. As a result of the determination, if it is determined that detection is possible, the process proceeds to step S304. If it is determined that detection is impossible, the process proceeds to step S305.

Step S304 (Displays detection possibility (confirmation sound))
Since it is determined that the soft limit 105 is detectable, the control unit 103 causes the signal generator 108 to generate a detectable signal, and displays the detectable possibility on a display device such as an X-ray image display monitor, or the X-ray When the image display monitor is a personal computer, a confirmation sound is emitted from a speaker built in the personal computer, and the process proceeds to the terminal A.

Step S305 (Display that detection is not possible (warning sound))
Since it is determined that the soft limit 105 cannot be detected, the control unit 103 causes the signal generator 108 to generate an undetectable signal and displays the detection failure on a display device such as an X-ray image display monitor. A warning sound is emitted from the speaker built in the personal computer.

Step S306 (Substrate replacement)
Since the operator recognizes that the detection is impossible by a display or a warning sound, the board for operating the soft limit 105 is replaced. The control unit 103 proceeds to step S302 again to confirm the operation of the replaced substrate.

  FIG. 4 is a flowchart illustrating processing of the microswitch according to the first embodiment.

Step S401 (Soft limit operation OFF)
The control unit 103 stops the soft limit operation.

Step S402 (operation signal calculation)
The control unit 103 artificially calculates a state where the position of the soft limit 105 (the movable range of the fluoroscopic table) has been exceeded due to a failure of a rotary encoder or potentiometer (not shown). Under this pseudo-calculation, each axis of the fluoroscopic imaging table 102 is operated using the automatic operation control incorporated in advance in the remote operation console 104 or the control device 103.

Step S403 (micro switch detection?)
The control unit 103 determines whether or not the micro switch 106 is normally detected. As a result of the determination, if it is determined that detection is possible, the process proceeds to step S404. If it is determined that detection is impossible, the process proceeds to step S405.

Step S404 (Displays detection possibility (confirmation sound))
Since it is determined that the micro switch 106 can be detected, the control unit 103 causes the signal generator 108 to generate a detectable signal and displays the detectable signal on a display device such as an X-ray image display monitor or the X-ray When the image display monitor is a personal computer, a confirmation sound is emitted from a speaker built in the personal computer, and the terminal B is shifted to.

Step S405 (Display that detection is not possible (warning sound))
Since it is determined that the micro switch 106 is not detectable, the control unit 103 causes the signal generator 108 to generate an undetectable signal, and displays the detection failure on a display device such as an X-ray image display monitor, A warning sound is emitted from the speaker built in the personal computer.

Step S406 (micro switch replacement)
Since the operator has recognized that detection is impossible by display or warning sound, the micro switch 106 is replaced. The control unit 103 again proceeds to step S402 to confirm the operation of the replaced micro switch 106.

FIG. 5 is a flowchart illustrating processing of the mechanical stopper according to the first embodiment.
Step S501 (Micro switch operation OFF)
The control unit 103 stops the microswitch operation.

Step S502 (operation signal calculation)
The control unit 103 artificially calculates a state where the position of the micro switch 106 (the movable range of the fluoroscopic table) has been exceeded due to a failure of a rotary encoder or potentiometer (not shown). Under this pseudo-calculation, each axis of the fluoroscopic imaging table 102 is operated using the automatic operation control incorporated in advance in the remote operation console 104 or the control device 103.

Step S503 (contact the mechanical stopper?)
The control unit 103 determines whether or not the movable unit has come into contact with the mechanical stopper 107 and stopped. As a result of the determination, if it is determined that the contact has stopped, the process proceeds to step S504. On the other hand, if it is determined that the contact does not stop, the process proceeds to step S506.

Step S504 (Displays no problem (confirmation sound))
Since it is determined that the mechanical stopper 107 has come into contact and stopped, the control unit 103 generates a signal that can be detected by the signal generator 108 and displays whether the stop after contact is possible on a display device such as an X-ray image display monitor. Then, a confirmation sound is emitted from a speaker built in the personal computer.

Step S505 (Part status check mode OFF)
The control unit 103 ends the component state confirmation mode.

Step S506 (Indication of problem (warning sound))
Since it has been determined that the mechanical stopper 107 has not been touched and stopped, the control unit 103 causes the signal generator 108 to generate an undetectable signal, and displays that it cannot be stopped after contact on a display device such as an X-ray image display monitor. Or, a warning sound is emitted from a speaker built in the personal computer.

Step S507 (mechanical stopper replacement)
Since the operator recognizes that detection is impossible by display or warning sound, the mechanical stopper 107 is replaced. The control unit 103 proceeds to step S302 again to confirm the operation of the replaced mechanical stopper.

  According to the first embodiment described above, the fluoroscopic table 102 on which the subject 101 is placed, the X-ray tube device 401 that irradiates the subject 101 with X-rays, and the transmitted X-ray of the subject are detected. The X-ray detector 70, the X-ray high voltage device 301 for supplying power to the X-ray tube device, the console 104 for operating these devices, and the fluoroscopic table 102 in the height direction of the subject 101 And a plurality of safety mechanisms (105.106, 107) having different movable ranges in which the fluoroscopic table 102 moves relative to the support 109, the plurality of safety mechanisms (105.106, 107), when performing an operation check on an arbitrary safety mechanism, the controller 103 is provided with a control device 103 that deactivates the safety mechanism in which a movable range narrower than the arbitrary safety mechanism is set. It is possible to provide an X-ray fluoroscopy table that can confirm the function.

  Further, the unique effect of the first embodiment can confirm the durability and reliability of the mechanical stopper 107 in advance. If there is a loss or destruction at the time of the mechanical stopper 107 collision, repairs and repairs can avoid the worst situation (injury of the operator / subject) in the event of an accident. A safe X-ray fluoroscopic table 102 can be provided.

  In addition, since the control system 103 monitors the collision position with a rotary encoder or potentiometer (not shown), when the position of the mechanical stopper 107 is reached, this is indicated on the signal generator 108 as a display and a warning sound. Can be recognized.

  In Example 1, when confirming the position detection micro switch 106 and mechanical stopper 107, as shown in FIG. 6, a warning sound that does not normally occur from the remote console 104 is continuously generated. It has become.

FIG. 6 is a flowchart showing the processing of the second embodiment.
Step S601 (Part status check mode ON)
The control unit 103 starts the component state confirmation mode.

Step S602 (Warning sound specific to component status check mode ON)
The control unit 103 starts a mode for sounding a warning sound unique to the component state confirmation mode.

Step S503 (Part status check mode OFF)
The control unit 103 ends the component state confirmation mode.

Step S504 (Warning sound specific to component status check mode OFF)
The control unit 103 ends the mode for sounding the warning sound unique to the component state confirmation mode.
According to the second embodiment described above, the fluoroscopic table 102 on which the subject 101 is placed, the X-ray tube device 401 that irradiates the subject 101 with X-rays, and the transmitted X-ray of the subject are detected. The X-ray detector 70, the X-ray high voltage device 301 for supplying power to the X-ray tube device, the console 104 for operating these devices, and the fluoroscopic table 102 in the height direction of the subject 101 And a plurality of safety mechanisms (105.106, 107) having different movable ranges in which the fluoroscopic table 102 moves relative to the support 109, the plurality of safety mechanisms (105.106, 107), when performing an operation check on an arbitrary safety mechanism, the controller 103 is provided with a control device 103 that deactivates the safety mechanism in which a movable range narrower than the arbitrary safety mechanism is set. It is possible to provide an X-ray fluoroscopy table that can confirm the function.

  In addition, the unique effect of Example 2 is that after the confirmation work, it can be recognized whether the X-ray fluoroscopic table is in the normal state or the safety confirmation work state, so the part failure reproduction state remains. It is possible to prevent the X-ray fluoroscopic table from operating.

(Other variations)
In the first embodiment, an example in which the operation check is performed in the order of the soft limit 105, the micro switch 106, and the mechanical stopper 107 has been described. There is also.

  When the operation of the soft limit 105 is confirmed independently, steps S301 to S306 are performed and finally step S505 is performed in the flowcharts of FIGS.

  When confirming the operation of the micro switch 106 alone, step S301 is performed, steps S401 to S406 are subsequently performed, and step S505 is finally performed in the flowcharts of FIGS.

When confirming the operation of the mechanical stopper 107 alone, Steps S301 and S401 are performed in the flowcharts of FIGS. 3 to 5, and Steps S501 to S507 are subsequently performed.
As described above, when the operation of the soft limit 105, the micro switch 106, or the mechanical stopper 107 is checked independently, a program that operates according to the above procedure may be created and the created program may be executed.

  100 shooting room, 200 operation room, 200W window, 201 operator, 301 X-ray high voltage device, 401 X-ray tube device, 30 support frame, 50 support, 70 X-ray detector, 101 subject, 102 X-ray Fluoroscopy table, 103 control unit, 104 remote control console, 105 soft limit, 106 micro switch for position detection, 107 mechanical stopper, 108 signal generator (abnormal display means)

Claims (4)

A fluoroscopic table for placing the subject, an X-ray tube device for irradiating the subject with X-rays, an X-ray detector for detecting the transmitted X-rays of the subject, and the X-ray tube device An X-ray high-voltage device for supplying power; a console for operating these devices; a support unit that supports the fluoroscopic table so as to be movable in the height direction of the subject; and the fluoroscopic table with respect to the support unit. An X-ray fluoroscopic imaging table comprising a position detection unit for detecting a position and a plurality of stages of safety mechanisms having different movable ranges in which the fluoroscopic table moves relative to the support unit,
When performing an operation check on an arbitrary safety mechanism of the plurality of safety mechanisms, a control unit is provided that deactivates a safety mechanism in which a movable range narrower than the arbitrary safety mechanism is set. X-ray fluoroscopy table.   The multiple-stage safety mechanism includes at least a first-stage safety mechanism in which the movable range of the fluoroscopic table is set to be the narrowest, and a second stage in which the movable range of the fluoroscopic table is set wider than the first-stage safety mechanism. 2. The X-ray fluoroscopic imaging table according to claim 1, further comprising: a safety mechanism of a first stage, and a third-stage safety mechanism that sets a movable range of the fluoroscopic stage wider than the safety mechanism of the second stage.   The multiple-stage safety mechanism includes a first-stage safety mechanism by software for controlling the fluoroscopic imaging table, a second-level safety mechanism by hardware provided in the X-ray fluoroscopic imaging table, and the X-ray safety mechanism. The X-ray fluoroscopic imaging table according to claim 1, further comprising a third-stage safety mechanism by a mechanism constituting the fluoroscopic imaging table.   The X-ray fluoroscopic imaging table according to claim 1, wherein the console generates a warning sound unique to a component state confirmation mode.

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