JP2015016156A - X-ray image diagnostic apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an X-ray image diagnostic apparatus which monitors malfunction in an X-ray generation unit generating X-rays and gives warning.SOLUTION: For detecting vibration of a rotary anode type X-ray tube device, an X-ray image diagnostic apparatus 1 is mounted on a vibration detector 5 (distortion sensor). The distortion sensor is mounted on a position striding, for example, an arm 11 and an X-ray generation unit 12 to detect the vibration of the rotary anode type X-ray tube device as an amount of distortion. The X-ray image diagnostic apparatus 1 holds a predetermined amount of distortion in generation of abnormal sound as a threshold value 25a for determining a warning level. A control unit 23 detects the amount of distortion with the distortion sensor before or during use of the device, and determines the warning level by comparing the detected amount of distortion with the threshold value 25a. When determining that the amount of distortion reaches the warning level, a warning unit 26 performs a warning operation.

Description

  The present invention relates to an X-ray image diagnostic apparatus, and more particularly to a technique for monitoring and warning a mechanical abnormality of an X-ray image diagnostic apparatus.

  An X-ray image diagnostic apparatus is an apparatus that irradiates a subject with X-rays generated by an X-ray tube, detects an X-ray dose that has passed through the subject, and forms an image. Various types of X-ray diagnostic imaging apparatuses have been developed according to their uses and purposes. For example, as an X-ray diagnostic apparatus assumed to be used in an operating room, there is a mobile X-ray diagnostic apparatus as shown in Patent Document 1. This type of mobile X-ray imaging apparatus has an X-ray tube device at one end and a C-shaped arm (C arm) that supports the X-ray image receiving device at the other end at a position facing each other. (1) C-arm vertical movement mechanism, (2) C-arm turning mechanism, (3) C-arm circular movement mechanism, (4) C-arm swing mechanism, (5) C-arm longitudinal movement mechanism, 6) A C-arm left / right moving mechanism and the like are provided, and the C-arm that supports the X-ray tube device can move in various directions. Moreover, the main body part including the support | pillar which supports C arm etc. is mounted in a trolley | bogie, and it can move on a floor surface.

Japanese Patent No. 4666857

  However, in the mobile X-ray imaging apparatus described in Patent Document 1, no special consideration is given to performing abnormality diagnosis of the apparatus. In a mobile X-ray diagnostic apparatus used in an operating room or the like, for example, if a mechanical abnormality of the apparatus occurs while the subject is laparotomized, a fluoroscopic diagnosis cannot be continuously performed, which is very problematic. It is. In particular, it is desirable that an abnormality in the X-ray generation unit can be detected early.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to monitor an X-ray generation abnormality that generates X-rays and warn about the abnormality. Is to provide.

  In order to achieve the above-described object, the present invention provides an X-ray generator that irradiates a subject with X-rays, and an X-ray image that detects transmitted X-rays that are disposed opposite to the X-ray generator and are transmitted through the subject. An arm that holds the X-ray generation unit at one end and the X-ray image receiving unit at the other end, an arm moving mechanism that supports and moves the arm, and a magnitude of vibration of the X-ray generation unit A vibration detector to be detected; a determination unit that determines whether or not the magnitude of vibration detected by the vibration detector is a warning level; and the determination unit that determines that the magnitude of vibration is a warning level An X-ray diagnostic imaging apparatus comprising a warning unit that performs a warning operation.

  According to the present invention, it is possible to provide an X-ray diagnostic imaging apparatus that can monitor and warn of an abnormality in an X-ray generator that generates X-rays.

1 is an overall configuration diagram of a mobile X-ray fluoroscopic apparatus 1 that is an example of an X-ray image diagnostic apparatus 1 according to the present invention. The internal block diagram of the X-ray-image diagnostic apparatus 1 which concerns on this invention Threshold setting process executed by the X-ray image diagnostic apparatus 1 (first embodiment) Monitoring process executed by the X-ray diagnostic imaging apparatus 1 (first embodiment) The figure which shows the back-and-forth movement (X direction movement) of the arm 11 Threshold setting example according to the X-direction position (front-rear direction position) of the arm 11 Threshold value setting process executed by the X-ray image diagnostic apparatus 1 (second embodiment) Monitoring process executed by the X-ray diagnostic imaging apparatus 1 (second embodiment) Threshold setting process executed by the X-ray image diagnostic apparatus 1 (third embodiment) Monitoring process executed by the X-ray diagnostic imaging apparatus 1 (third embodiment) Graph showing change in strain Monitoring process executed by the X-ray image diagnostic apparatus 1 (fourth embodiment) Internal configuration diagram of X-ray diagnostic imaging apparatus 1A according to the fifth embodiment Example of mounting strain sensor 5b (sixth embodiment) G part enlarged view of FIG. Monitoring process executed by X-ray image diagnostic apparatus 1 (seventh embodiment)

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

  In the present embodiment, a mobile X-ray fluoroscopic apparatus will be described as a preferred example of the X-ray diagnostic imaging apparatus 1 according to the present invention, but the present invention is not limited to this form. For example, the present invention can be applied to an X-ray imaging apparatus that irradiates a subject with X-rays and captures an X-ray image that is a still image. Further, the present invention is not limited to a mobile device, and can be applied to a stationary device or a ceiling-suspended device.

[First Embodiment]
First, based on FIG.1 and FIG.2, schematic structure of the X-ray-image diagnostic apparatus 1 which concerns on this embodiment is demonstrated. FIG. 1 is an overview diagram of the X-ray image diagnostic apparatus 1, and FIG. 2 is an internal configuration diagram. In FIG. 2, a broken line indicates a mechanical connection, and an arrow indicates an electrical connection.

  An X-ray image diagnostic apparatus 1 shown in FIG. 1 is a movable X-ray fluoroscopic apparatus in which a C-arm type X-ray apparatus is mounted on a carriage to be movable. The X-ray fluoroscopic imaging apparatus has a fluoroscopic function for continuously irradiating a subject with X-rays to generate an X-ray image (perspective image) composed of a moving image, and irradiating the subject with X-rays for a moment and still images. And a general imaging function for generating an X-ray image consisting of

  As shown in FIG. 1, the X-ray image diagnostic apparatus 1 includes a mobile X-ray apparatus 2 including an X-ray generation unit 12 and an X-ray image receiving apparatus 13 and a movement including a display unit 32 that displays an X-ray image. Type image display device 3. The mobile X-ray device 2 and the mobile image display device 3 are configured separately and are electrically connected by a cable 4. In the X-ray image diagnostic apparatus 1 according to the present embodiment, the mobile X-ray apparatus 2 and the mobile image display apparatus 3 are configured separately, but the image display apparatus is integrated with the mobile X-ray apparatus 2. You may make it prepare.

  The mobile X-ray apparatus 2 includes an arm 11 that connects and supports the X-ray generation unit 12 and the X-ray image receiving apparatus 13 facing each other, an arm moving mechanism that supports and moves the arm 11, and an arm 11. And the main-body part 22 carrying an arm moving mechanism and the traveling part 21 which moves the main-body part 22 on a floor surface are provided.

  The arm moving mechanism supports an arm support unit 14 that rotatably connects the arm 11 to the main body unit 22, and the arm support unit 14, and includes a front-rear direction (D direction in FIG. 1) and a left-right direction (E in FIG. 1). 1), and a vertical movement unit 16 that moves the front / rear left / right movement unit 15 up and down relative to the floor (direction F in FIG. 1).

  The main body unit 22 includes a control unit 23, an operation unit 24, a storage unit 25, and a warning unit 26. The traveling unit 21 has a front wheel 21a and a rear wheel 21b and a main body 22 mounted thereon, a traveling operation unit (handle 27, brake 28) operated when traveling on the cart, and the front wheel 21a or the rear wheel 21b. And the like.

  In FIG. 1, the arm 11 is formed in an arc shape, that is, a substantially C shape, but is not limited to this shape. The arm 11 may have any shape as long as the X-ray generation unit 12 and the X-ray image receiving unit 13 are connected and supported in a state of facing each other.

  At one end of the arm 11, an X-ray tube device 12 a that is an X-ray generation unit 12 is fixed to the arm 11 while being placed on the arm 11. A vibration detector 5 is provided so as to straddle the X-ray generator 12 and the arm 11.

  As shown in FIG. 2, the X-ray generator 12 includes an X-ray tube device 12a, a high voltage generator 12c, and an X-ray diaphragm 12b. The X-ray tube device 12a receives power from the high voltage generator 12c and generates X-rays. The operations of the X-ray tube device 12a and the high voltage generator 12c are controlled by the X-ray control unit 12d. The X-ray control unit 12d controls the X-ray tube current, the X-ray tube voltage, and the like according to the X-ray control signal transmitted from the control unit 23.

  The X-ray diaphragm 12b has a plurality of X-ray shielding plates that shield X-rays generated from the X-ray tube device 12a. The material of the X-ray shielding plate is, for example, lead. The X-ray diaphragm 12b forms an X-ray irradiation region by moving a plurality of X-ray shielding plates according to a control signal from the X-ray control unit 12d (or the control unit 23).

  The X-ray tube apparatus 12a is roughly classified into a fixed anode type and a rotary anode type. The X-ray diagnostic imaging apparatus 1 according to the present invention uses a rotary anode type X-ray tube apparatus.

  The anode of the rotary anode type X-ray tube device is composed of a rotor and an umbrella-shaped target, and rotates on the principle of an induction motor. By rotating the target (rotating anode), the electron impact area of the target increases, and in the case of a short time load, the input per unit area of the focal point can be greatly increased, realizing a large-capacity X-ray tube It can be done.

  The rotating anode of the X-ray tube apparatus 12a rotates at a high speed, but wear and distortion of the bearing occur due to aging. When such wear or distortion occurs, axial blurring occurs in the rotation of the anode, and the manner of vibration of the X-ray tube apparatus 12a changes. Therefore, the X-ray diagnostic imaging apparatus 1 according to the present invention includes a vibration detector 5 that detects vibration of the X-ray generator 12 (X-ray tube apparatus 12a), and a warning unit 26 that performs a warning operation when abnormal vibration is detected. With.

  The vibration detector 5 detects the magnitude of vibration of the X-ray generator 12, and for example, a strain sensor is used. When a strain sensor is used as the vibration detector 5, for example, as shown in FIG. 1, the vibration detector 5 is attached at a position straddling the arm 11 and the X-ray generator 12. In this way, the vibration of the X-ray generator 12 relative to the arm 11 can be detected by attaching the strain sensor so as to straddle the X-ray generator 12 and the arm 11 and detecting the strain amount of the strain sensor at the mounting position.

  The strain sensor includes, for example, a strain gauge, a bridge circuit, a voltage amplifier, and the like. A strain gauge is a metal resistor (metal foil) disposed on a thin insulator, and is used by being bonded to an object to be measured. The strain sensor measures a minute change in electrical resistance when the strain gauge is deformed, and amplifies it with a bridge circuit and a voltage amplifier to measure the amount of strain. The vibration detector 5 is not limited to the strain sensor using the above-described strain gauge, and may be any device that can measure the amount of strain. The vibration detector 5 detects and measures distortion at the attachment position due to vibration of the X-ray generation unit 12, and outputs the measured distortion amount to the control unit 23.

  The X-ray image receiving unit 13 detects X-rays generated from the X-ray generation unit 12 and outputs an electric signal corresponding to the X-ray intensity. The X-ray image receiving unit 13 is a device having a function of detecting X-rays, such as a flat panel detector (hereinafter abbreviated as “FPD”) and an image intensifier. The X-ray image receiving unit 13 is connected to the other end of the arm 11 so as to be rotatable (rotated in the direction of arrow A in FIG. 1) in a horizontal plane.

  The main body 22 is a control unit 23 that controls the operation of each component including the X-ray generation unit 12, the X-ray image receiving unit 13, the arm support unit 14, the front / rear left / right moving unit 15, the vertical moving unit 16, and the traveling unit 21. And an operation unit 24 that receives an input operation by an operator, a storage unit 25 that stores various data necessary for the control operation, and a warning unit 26 that warns of an abnormality of the apparatus. The operation unit 24, the storage unit 25, and the warning unit 26 are electrically connected to the control unit 23 via a bus (not shown).

  The control unit 23 includes a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), and the like. The control unit 23 sends an X-ray irradiation operation control signal to the X-ray control unit 12d based on the input signal input from the operation unit 24. Further, the control unit 23 detects X-rays transmitted through the subject (hereinafter abbreviated as “transmitted X-rays”) and controls data collection operations. Further, the control unit 23 sends a movement control signal to the position control unit 17 that controls the rotation and movement operations of the arm 11. The arm 11 may be rotated and moved according to control by the control unit 23, or may be rotated and moved by manual operation by an operator.

  The control unit 23 includes a determination unit that determines whether the magnitude of vibration is a warning level based on a detection value (amount of strain) input from the vibration detector 5 (a strain sensor). When the determination unit determines that the magnitude of vibration is at the warning level, the control unit 23 sends a control signal to the warning unit 26 to perform a warning operation. The warning level is a level that indicates a sign that appears before the occurrence of a serious malfunction, although there is no difference in the use of the device at present.

  The warning unit 26 performs a warning operation according to a control signal input from the control unit 23. The detection of the amount of strain by the vibration detector 5 (strain sensor), the determination of the warning level based on the detected value, and the warning operation will be described later.

  The storage unit 25 stores various programs relating to fluoroscopy and photographing, programs and data necessary for operation control for warning, and the like. For example, a threshold 25a for the control unit 23 to determine whether or not the vibration (distortion amount) detected by the vibration detector 5 (strain sensor) is an abnormal vibration is stored.

  The mobile image display device 3 is electrically connected to the mobile X-ray device 2 via a cable 4. The mobile image display device 3 includes an image processing unit 31 and a display unit 32.

  The image processing unit 31 acquires an electrical signal (transmitted X-ray data) corresponding to transmitted X-rays transmitted from the X-ray image receiving unit 13 of the mobile X-ray apparatus 2. The image processing unit 31 generates an X-ray image of the subject based on the acquired transmission X-ray data.

  The display unit 32 is configured by a CRT, a liquid crystal panel, or the like, and displays an X-ray image generated by the image processing device 31 and display data input from the control unit 23. In FIG. 1, the display unit 32 includes two screens, but the number of screens may be one. Further, the image processing unit 31 can be mounted on the mobile X-ray apparatus 2 and the mobile image display apparatus 3 can be designed to be configured to output the generated X-ray image. Similarly, the control unit 23, the operation unit 24, the storage unit 25, the warning unit 26, and the image processing unit 31 may be mounted on any of the mobile X-ray device 2 and the mobile image display device 3.

Next, processing related to a warning operation executed by the control unit 23 of the X-ray image diagnostic apparatus 1 according to the first embodiment will be described with reference to FIGS. 3 and 4.
The control unit 23 of the X-ray diagnostic imaging apparatus 1 monitors the vibration before threshold use or during use of the apparatus, and determines whether or not the warning level is reached. Perform monitoring processing. The threshold setting process is performed in advance before shipping the apparatus.

FIG. 3 is a flowchart showing the flow of threshold setting processing.
The control unit 23 of the X-ray diagnostic imaging apparatus 1 continuously operates the X-ray tube apparatus 12a, and acquires a detection value (a distortion amount detected by the distortion sensor) detected by the vibration detector 5 (step S101).
When the bearing of the rotating anode is worn due to the continuous operation of the X-ray tube device 12a and shaft blurring occurs, mechanical abnormal noise is generated as a sign of abnormality in the X-ray tube device 12a. The inspector determines whether or not a mechanical abnormal sound is generated, sets the distortion amount ε when the abnormal sound is generated as a warning level determination threshold 25a, and stores it in the storage unit 25 (step S102).

In step S <b> 102, the control unit 23 may display a setting screen for threshold setting on the display unit 32. On the setting screen, the amount of distortion being measured is displayed in real time, a setting button operated when setting the threshold value, an input field for inputting a value when finely adjusting the threshold value, etc. desirable.
The X-ray image diagnostic apparatus 1 is shipped in a state where a warning level determination threshold value 25a for warning an abnormality of the apparatus is stored in the storage unit 25 by the threshold setting process.

  After being shipped, the control unit 23 of the X-ray diagnostic imaging apparatus 1 performs a monitoring process before or during use of the apparatus. FIG. 4 is a flowchart showing the flow of the monitoring process.

  In the monitoring process, the control unit 23 acquires the strain amount detected by the strain sensor (vibration detector 5) at a predetermined sampling interval (step S201). For example, the distortion amount is sampled every 0.10 seconds. When the strain amount is acquired from the strain sensor 5, the control unit 23 determines whether or not the acquired strain amount is a warning level (step S202). Whether or not it is a warning level is determined by whether or not the value (ε) of the warning level determination threshold 25a stored in the storage unit 25 is exceeded. When the acquired distortion amount does not exceed the warning level determination threshold (ε) (step S202; No), the process returns to step S201.

  When the acquired distortion amount exceeds the warning level determination threshold (ε) and is determined to be the warning level (step S202; Yes), the control unit 23 outputs an instruction signal to the warning unit 26 to perform a warning operation. To do. The warning unit 26 performs a warning operation according to the instruction signal (step S203). The warning operation may be any of, for example, sounding a warning sound, sound reproduction of a warning message, or display of a warning message on the display unit 32. When the warning operation ends, the control unit 23 ends the monitoring process. Alternatively, the monitoring process may be continued by returning to step S201 again in accordance with an instruction input from the operator.

Alternatively, after the warning operation in step S203, the control unit 23 may determine whether or not to stop the apparatus (stop determination).
In this case, the storage unit 25 of the X-ray image diagnostic apparatus 1 holds an apparatus stop threshold value for determining in advance the apparatus stop. The threshold value for stopping the apparatus is a value where the detection value (distortion amount) indicating the magnitude of vibration is larger than the warning level determination threshold value (ε). The control unit 23 includes a stop determination unit and a device stop control unit.

  The stop determination unit compares the apparatus stop threshold stored in the storage unit 25 with a detection value (distortion amount) indicating the magnitude of vibration detected by the vibration detector 5 (distortion sensor) in step S201. When the magnitude (distortion amount) of vibration detected by the vibration detector 5 (strain sensor) in step S201 is larger than the apparatus stop threshold, the apparatus stop control unit 12d of the X-ray image diagnostic apparatus 1 is the X-ray control unit 12d. An operation stop signal is transmitted to stop the X-ray generation operation. Thereby, the apparatus can be safely stopped when vibration is very large. In addition to the generation of X-rays, the operation of other units may be stopped.

  As described above, the X-ray diagnostic imaging apparatus 1 according to the first embodiment uses a strain sensor as the vibration detector 5. The strain sensor is attached at a position straddling the arm 11 and the X-ray generator 12. The strain sensor detects the magnitude of vibration of the rotary anode X-ray tube device as the amount of strain. The control unit 23 determines whether or not the warning level is reached by comparing the warning level determination threshold value 25a with the strain amount detected by the strain sensor before or during use of the device. When the warning level is determined, the warning unit 26 performs a warning operation.

  Thereby, it is possible to constantly monitor the vibration of the X-ray generation unit 12 and warn of a mechanical abnormality before an actual failure such as breakage of the glass tube of the X-ray tube device occurs. As a result, the device can be used safely. In addition, since a strain sensor is used as the vibration detector 5 for monitoring abnormality (vibration), it can be realized with a simple device configuration.

[Second Embodiment]
Next, a second embodiment of the present invention will be described. Since the hardware configuration of the X-ray diagnostic imaging apparatus 1 of the second embodiment is the same as that of the first embodiment (FIGS. 1 and 2), the duplicate description is omitted and the same parts are the same. This will be described with reference numerals.

  As described in the first embodiment, the arm 11 of the mobile X-ray apparatus 2 includes the front / rear left / right moving unit 15 (see FIG. 2). Therefore, as shown in FIG. 5, the X-ray generator 12 may be operated in a state where the position of the arm 11 is moved in the front-rear direction (X direction in FIG. 5).

For example, in a state of moving the arm 11 to the position X ₁ shown in FIG. 5, the distance from the fulcrum supporting the arm 11 is long. For this reason, arm 11 itself becomes easy to shake. As a result, the vibration at the mounting position of the X-ray generator 12 connected to the arm 11 also increases. Then, the amount of strain of the vibration detector 5 (strain sensor) is detected large. That is, when the arm 11 is extended and is at a position far from the fulcrum, even if the X-ray tube apparatus 12a does not actually have an abnormality, a large amount of distortion may be detected, and it may be erroneously determined to be abnormal. In the second embodiment, depending on the position of the arm 11 from a predetermined reference position X _0, the warning level determination threshold value for abnormality determination, set the arm position based threshold data 25b.

FIG. 6 is an example of the arm position threshold data 25b set in the second embodiment. As shown in FIG. 6, arm position based threshold data 25b is the position of the arms away from the fulcrum (i.e., away from the reference position X ₀₎ warning level threshold according to is set to increase.

  FIG. 7 is a flowchart showing a flow of threshold setting processing performed before the shipment of the apparatus in the second embodiment.

  The control unit 23 of the X-ray diagnostic imaging apparatus 1 detects the position of the arm in the X direction (forward / backward movement position) and the detection value detected by the vibration detector 5 (the amount of distortion detected by the strain sensor) during the continuous operation of the X-ray tube apparatus 12a. ) Is acquired and recorded (step S301).

The inspector determines the occurrence of mechanical abnormal noise when the arm 11 is moved to each X-direction position (forward / backward movement position), and determines the distortion amount (warning level determination threshold) when the abnormal sound is generated. The threshold value data 25b for each arm position indicating the relationship with the X direction position (back and forth movement position) is generated and stored in the storage unit 25 (step S302).
The apparatus is shipped in a state where the arm position threshold data 25b is stored in the storage unit 25.

  After being shipped, the control unit 23 of the X-ray diagnostic imaging apparatus 1 performs a monitoring process before or during use of the apparatus. FIG. 8 is a flowchart showing the flow of the monitoring process.

  In the monitoring process of FIG. 8, the control unit 23 acquires the current X-direction position (front-rear direction position) of the arm from the position control unit 17 (step S401). Next, the control unit 23 refers to the arm position-specific threshold value data 25b stored in the storage unit 25, acquires the threshold value ε corresponding to the position in the X direction acquired in step S401, and sets it as a warning level determination threshold value. (Step S402).

  The control unit 23 acquires the strain amount detected by the strain sensor (vibration detector 5) at a predetermined sampling interval (step S403). The control unit 23 determines whether or not the distortion amount acquired in step S403 is a warning level (step S404). Whether or not it is a warning level is determined based on whether or not the distortion amount acquired in step S403 exceeds the warning level determination method threshold value set in step S402. If the acquired distortion amount does not exceed the warning level determination threshold set in step S402 (step S404; No), the process returns to step S401.

  When the distortion amount acquired in step S403 exceeds the warning level determination threshold set in step S402 and is determined to be the warning level (step S404; Yes), the control unit 23 performs a warning operation on the warning unit 26. An instruction signal is output to be performed. The warning unit 26 performs a warning operation according to the instruction signal (step S405). As in the first embodiment, the warning operation may be any of, for example, sounding a warning sound, reproducing a warning message, or displaying a warning message on the display unit 32.

  As described above, in the X-ray image diagnostic apparatus 1 according to the second embodiment, the arm position changed by the front / rear / left / right moving unit is also monitored, and the warning level determination threshold is changed according to the arm position. A warning operation is performed when the strain amount of the strain sensor exceeds the threshold value. Therefore, even when the arm is extended and easily oscillates, it is possible to correctly determine and warn of an abnormality in the X-ray tube apparatus itself.

  Note that the second embodiment can be applied not only when the arm moves in the front-rear direction but also when it moves in the left-right direction.

[Third Embodiment]
Next, the X-ray image diagnostic apparatus 1 according to the third embodiment will be described with reference to FIGS. Since the hardware configuration of the X-ray diagnostic imaging apparatus 1 of the third embodiment is the same as that of the first embodiment (FIGS. 1 and 2), the duplicate description is omitted and the same parts are the same. This will be described with reference numerals.

  The number of rotations of the rotating anode of the X-ray tube device 12a varies depending on the X-ray conditions. Therefore, the magnitude of vibration of the X-ray tube device 12a (X-ray generator 12) varies depending on the X-ray conditions. Thus, in the third embodiment, the warning level determination threshold is changed according to the X-ray condition.

  FIG. 9 is a flowchart showing a flow of threshold setting processing performed before the shipment of the apparatus in the third embodiment.

  The control unit 23 of the X-ray diagnostic imaging apparatus 1 continuously operates the X-ray tube apparatus 12a under various X-ray conditions, and the X-ray condition and the detection value detected by the vibration detector 5 (the amount of distortion detected by the strain sensor). Is acquired and recorded (step S501).

The inspector determines the occurrence of mechanical abnormal noise under each X-ray condition, and threshold data 25c (by threshold value for warning level determination) indicating the amount of distortion (warning level determination threshold) when abnormal sound occurs under each X-ray condition. (Not shown) is generated and stored in the storage unit 25 (step S502).
The apparatus is shipped with the threshold data 25c stored in the storage unit 25.

  After being shipped, the control unit 23 of the X-ray diagnostic imaging apparatus 1 performs a monitoring process before or during use of the apparatus. FIG. 10 is a flowchart showing the flow of the monitoring process.

  In the monitoring process of FIG. 10, the control unit 23 acquires the set X-ray condition (step S601). As the X-ray condition, for example, a value input by an operator before performing fluoroscopy or imaging, or a predetermined value set in advance is set. Next, the control unit 23 refers to the X-ray condition threshold data 25c stored in the storage unit 25, obtains a threshold corresponding to the X-ray condition acquired in step S601, and sets it as a threshold for warning level determination. (Step S602).

  The control unit 23 acquires the strain amount detected by the strain sensor (vibration detector 5) at a predetermined sampling interval (step S603). The control unit 23 determines whether or not the distortion amount acquired in step S603 is a warning level (step S604). Whether or not it is a warning level is determined based on whether or not the distortion amount acquired in step S603 exceeds the warning level determination method threshold set in step S602. If the acquired distortion amount does not exceed the warning level determination threshold set in step S602 (step S604; No), the process returns to step S601.

  When the distortion amount acquired in step S603 exceeds the warning level determination threshold set in step S602 and is determined to be the warning level (step S604; Yes), the control unit 23 performs a warning operation on the warning unit 26. An instruction signal is output to be performed. The warning unit 26 performs a warning operation according to the instruction signal (step S605). As in the first embodiment, the warning operation may be any of, for example, sounding a warning sound, reproducing a warning message, or displaying a warning message on the display unit 32.

  As described above, in the X-ray diagnostic imaging apparatus 1 according to the third embodiment, the warning level determination threshold is changed according to the X-ray condition. A warning operation is performed when the strain amount of the strain sensor exceeds the threshold value. Therefore, it is possible to correctly determine whether the vibration is abnormal or normal with each threshold corresponding to the X-ray condition, and warn.

[Fourth Embodiment]
Next, an X-ray image diagnostic apparatus 1 according to a fourth embodiment will be described with reference to FIGS. Since the hardware configuration of the X-ray diagnostic imaging apparatus 1 of the fourth embodiment is the same as that of the first embodiment (FIGS. 1 and 2), the duplicate description is omitted and the same parts are the same. This will be described with reference numerals.

  In the first to third embodiments, the control unit 23 of the X-ray image diagnostic apparatus 1 detects the magnitude of vibration of the X-ray generation unit 12 by the vibration detector 5 (distortion sensor), and has a predetermined warning level. By determining whether or not the determination threshold is exceeded, it is determined whether or not the vibration is abnormal. However, even if the warning level judgment threshold is not exceeded, if the magnitude of vibration (amount of distortion) increases rapidly, scratches, indentations, etc. are generated inside the bearing of the rotating anode of the X-ray tube apparatus 12a. It is thought that it was done and needs attention.

FIG. 11 is a graph showing the change over time of the detection value of the detection value of the vibration detector 5 (the amount of distortion detected by the strain sensor). The horizontal axis represents time (t) and the vertical axis represents the amount of distortion.
For example, in the graph shown in FIG. 11, the amount of distortion does not exceed the warning determination threshold (ε), but the amount of distortion increases rapidly between times t1 and t2. The X-ray diagnostic imaging apparatus 1 according to the fourth embodiment monitors such a rapid change in the magnitude of vibration (amount of distortion) and controls to warn when it suddenly increases.

  In the X-ray diagnostic imaging apparatus 1 according to the fourth embodiment, the control unit 23 has a detection time (a strain amount detected by the strain sensor) indicating the magnitude of the vibration detected by the vibration detector 5 in a minute time. It further includes a change amount calculation unit that calculates a change amount, and a change amount determination unit that determines whether or not the change amount is rapidly increasing. The control unit 23 sends an instruction signal to the warning unit 26 to perform a warning operation when the change amount determination unit determines that the change amount has rapidly increased.

  FIG. 12 is a flowchart showing the flow of the monitoring process executed by the X-ray image diagnostic apparatus 1 after the apparatus is shipped and before or during use of the apparatus.

  In the monitoring process shown in FIG. 12, the control unit 23 acquires the strain amount detected by the strain sensor 5 at a predetermined sampling interval while acquiring a fluoroscopic image or a captured image. The control unit 23 temporarily holds the acquired distortion amount (step S701). For example, it is assumed that the past 10 sampling values are temporarily stored.

The control unit 23 obtains the difference between the distortion amount E _i-1 obtained in the current sampling time (t _i) distortion amount obtained in E _i and the immediately preceding sampling time (t _i-1), the difference value is the second It is determined whether or not the threshold value ε2 is exceeded (step S702). The second threshold ε2 is a threshold for determining the amount of change.

In order to warn of an increase in the distortion amount, a difference value (E _i −E _i−1 ) obtained by subtracting the past distortion amount E _i−1 from the current distortion amount E _i is used as a second threshold value ε2 (ε2 is a positive value). ).

  The second threshold ε2 is a threshold for monitoring the amount of change in distortion. The second threshold value ε2 may be a preset value or a value adjusted by the user. In addition, the second threshold ε2 may be set in consideration of the influence of changes in the X-ray conditions. For example, since the X-ray condition changes when switching from fluoroscopy to imaging, the change in the rotational speed of the rotary anode also increases. In consideration of the influence, the second threshold ε2 may be set.

In step S702, the amount of distortion that is different from the current amount of distortion is not limited to the one immediately before (t _i-1 ). It may be a difference from the distortion amount at any point in time in the past minute time range (for example, ti _-2 , ti _-3 , ti _-4 , ...).

  If the difference value of the distortion amount exceeds the second threshold value ε2 (change amount threshold value) in step S702, the control unit 23 outputs an instruction signal to the warning unit 26 to perform a warning operation. The warning unit 26 performs a warning operation according to the instruction signal (step S703). As in the first embodiment, the warning operation may be any of, for example, sounding a warning sound, reproducing a warning message, or displaying a warning message on the display unit 32.

  If the difference value of the distortion amount does not exceed the second threshold value ε2 in step S702, the warning level determination threshold value (threshold value ε1) exceeds the preset threshold level as in the first to third embodiments. It is determined whether or not there is (step S704).

  When the distortion amount acquired in step S701 exceeds the warning level determination threshold ε1 and is determined to be the warning level (step S704; Yes), the control unit 23 instructs the warning unit 26 to perform a warning operation. Is output. The warning unit 26 performs a warning operation according to the instruction signal (step S703). That is, although not a rapid change, when a distortion amount exceeding the warning level determination threshold ε1 is detected, a warning operation is performed as in the first embodiment.

  When the difference value between the current and previous distortion amounts does not exceed the second threshold value ε2 and the distortion amount acquired in step S701 does not exceed the warning level determination threshold value ε1 (step S704; No), the control unit 23 Returns to step S701 without performing a warning operation.

  As described above, in the X-ray image diagnostic apparatus 1 according to the fourth embodiment, the first threshold (warning level determination threshold ε1) for monitoring the magnitude of vibration (distortion amount), vibration ( The second threshold value (ε2) for monitoring the change amount of the distortion amount in a very short time is set and held in advance, and the value of the distortion amount detected by the strain sensor is greater than the warning level (warning level determination threshold value) A warning operation is performed when the amount of distortion (exceeding ε1) or the amount of distortion (difference value from the previous amount of distortion) is rapidly increasing (exceeding the second threshold ε2). Therefore, the occurrence of an abnormality can be monitored in more detail and a warning can be made quickly.

[Fifth embodiment]
Next, an X-ray image diagnostic apparatus 1A according to a fifth embodiment will be described with reference to FIG.

When the traveling unit 21 of the X-ray image diagnostic apparatus 1A is traveled or the arm 11 is moved, an extra external force is applied compared to the stationary state, and vibration is generated due to the influence of the external force.
In the fifth embodiment, when the X-ray image diagnostic apparatus 1A is traveled or when the operator moves the position of the arm 11 by manual operation, control is performed so as not to perform a warning operation.

  Specifically, when the travel operation unit (the handle 27 and the brake 28) of the travel unit 21 of the X-ray image diagnostic apparatus 1A is operated, or when the operation unit 24 is operated and the arm 11 is moved. For example, a warning canceling switch 261 for switching on / off the operation of the warning unit 26 is provided.

  FIG. 13 is a diagram illustrating an internal configuration of an X-ray image diagnostic apparatus 1A according to the fifth embodiment. The hardware configuration of the X-ray diagnostic imaging apparatus 1A according to the fifth embodiment includes a warning release switch 261 in addition to the configuration of the X-ray diagnostic imaging apparatus 1 according to the first embodiment (FIGS. 1 and 2). Since each part other than the warning release switch 261 is the same as that of the first embodiment, a duplicate description will be omitted, and the same parts will be described with the same reference numerals.

  The warning release switch 261 is detected by an operation detection sensor that detects whether or not there is an operation on the travel operation unit (the handle 27 or the brake 28) of the travel unit 21 or the arm operation handle of the operation unit 24, and the operation detection sensor. And a switch for switching on / off the operation of the warning unit 26 according to the presence / absence of the operated operation.

  For example, when the traveling handle or the handle for operating the arm is a lever handle type, the presence or absence of the operation may be detected by attaching a strain sensor to the attachment position of the lever handle. Alternatively, a micro switch may be attached to the pedal of the brake 28 so that the contact of the micro switch is inserted when the operator depresses the brake pedal to release the brake.

  In the X-ray diagnostic imaging apparatus 1A of the fifth embodiment, when the sensor of the warning release switch 261 detects an operation, the warning release switch 261 is turned off so that the warning unit 26 does not perform a warning operation. In a state where the sensor of the warning release switch 261 has not detected an operation, the warning release switch 261 is turned on so that the warning unit 26 executes a warning operation. Any of the operations in the first to fourth embodiments can be applied to the warning operation.

  As described above, according to the X-ray diagnostic imaging apparatus 1A of the fifth embodiment, it is possible to ignore vibration (distortion) generated by an external force applied during running or steering operation. Thereby, an unnecessary warning can be prevented.

[Sixth Embodiment]
Next, a sixth embodiment of the present invention will be described with reference to FIGS.

  In the first to fifth embodiments, the strain sensor as the vibration detector 5 is attached at a position across the arm 11 and the X-ray generation unit 12, but the attachment position of the strain sensor is not limited to this. .

The X-ray generation unit 12 is attached to one end of the arm 11, and the vibration of the X-ray generation unit 12 is supported by the front-rear left-right movement unit 15 that supports the arm 11 and the vertical movement unit 16 connected to the front-rear left-right movement unit 15. Also communicate.
FIG. 14 is a cross-sectional view of an essential part showing a connecting structure of the front / rear left / right moving part 15 that supports the arm 11 and the up / down moving part 16 that supports the front / rear left / right moving part 15. FIG. 15 is an enlarged view of a portion G in FIG.

  As shown in FIG.14 and FIG.15, the support | pillar 161 of the up-and-down moving part 16 is hollow, it fits with the axis | shaft 15a of the back-and-forth left-right moving part 15, and is connected with the screw | thread 16c.

  The support 161 of the vertical movement unit 16 supports the total weight W of the X-ray generation unit 12, the X-ray image receiving unit 13, the arm 11, and the front / rear left / right movement unit 15. Therefore, the column 161 receives a moment M generated by the total weight W and may be distorted as shown in FIG. The magnitude ΔL of the strain increases due to the vibration of the X-ray generation unit 12 attached to the end of the arm 11.

Therefore, in the sixth embodiment, the strain sensor 5b is attached to the column 161 of the vertical movement unit 16, and the vibration of the X-ray generation unit 12 is detected based on the strain amount ΔL of the column 161.
The amount of strain detected by the strain sensor 5 b is input to the control unit 23. Similar to the monitoring processing (FIGS. 4, 8, and 10) in the first to third embodiments, the control unit 23 compares the acquired distortion amount with a predetermined warning level determination threshold value to generate a warning. It is determined whether or not to perform an operation. When the amount of distortion exceeds a predetermined warning level determination threshold, the warning unit 26 is caused to perform a warning operation.

As in the first to third embodiments, the warning level determination threshold is measured and set in advance before shipping the device.
Also in the sixth embodiment, as described in the fourth embodiment, a comparison with a second threshold value for monitoring a rapid increase in the distortion amount may be further performed.
Also in the sixth embodiment, as in the fifth embodiment, the operation of the handle 27 and the brake 28 of the traveling unit 21 or the manual operation of the arm 11 and the ON / OFF operation of the warning unit 26 are linked. A warning release switch 261 may be provided.

  As described above, according to the X-ray diagnostic imaging apparatus 1A of the sixth embodiment, a strain sensor is attached to the column 161 of the vertical movement unit 16 as the vibration detector 5 and the strain of the column 161 is detected. The vibration of the X-ray generator 12 can be detected and a warning operation can be performed.

[Seventh Embodiment]
Next, an X-ray diagnostic imaging apparatus 1 according to a seventh embodiment of the present invention will be described with reference to FIG. Since the hardware configuration of the X-ray diagnostic imaging apparatus 1 of the seventh embodiment is the same as that of the first embodiment (FIGS. 1 and 2), the duplicate description is omitted and the same parts are the same. This will be described with reference numerals.

  Even when the magnitude (strain amount) of the X-ray generation unit 12 does not exceed the threshold value or when it does not increase rapidly, the long-term change in the magnitude (strain amount) tends to increase. Since there is a possibility that an abnormality has occurred, a warning is given.

  In the seventh embodiment, the X-ray diagnostic imaging apparatus 1 records the vibration amount (distortion amount) detected by the vibration detector 5 in a log, and the currently acquired distortion amount and the past distortion amount recorded in the log. And a log determination unit, and as a result of the comparison by the log determination unit, the currently acquired distortion amount is higher than the past distortion amount recorded in the log (third threshold ε3 If it becomes larger, a warning action is performed.

  FIG. 16 is a flowchart showing the flow of a monitoring process executed by the control unit 23 of the X-ray image diagnostic apparatus 1 before or during use of the apparatus in the seventh embodiment.

  The control unit 23 acquires a detection value (a strain amount detected by the strain sensor) detected by the vibration detector 5 at a predetermined sampling interval. In addition, the control unit 23 holds the acquired distortion amount as a log (step S801). It is assumed that the amount of strain acquired over a long period (for example, about several weeks to several months) is recorded in the log.

The control unit 23 obtains a difference between the distortion amount E _i by the currently acquired past distortion amount E _L, determines whether the difference value exceeds the third threshold .epsilon.3 (step S802).
In addition, since the comparison determination in step S702 is to determine a long-term change in distortion amount, for example, an average value of distortion amounts detected in a predetermined period from the log is calculated as the currently acquired distortion amount E _i . You may compare the average value of the amount of distortion in the present predetermined period with the average value of the amount of distortion in the predetermined period in the past (for example, about several weeks to several months).

  The third threshold value ε3 is a threshold value for monitoring a long-term change amount of the distortion amount. The third threshold ε3 may be a value set in advance or a value adjusted by the user.

  In step S802, if the difference value between the current and past distortion amounts exceeds the third threshold value ε3 (change amount threshold value), the control unit 23 instructs the warning unit 26 to perform a warning operation. Output. The warning unit 26 performs a warning operation according to the instruction signal (step S803). As in the first embodiment, the warning operation may be any of, for example, sounding a warning sound, reproducing a warning message, or displaying a warning message on the display unit 32.

  If the difference value of the distortion amount does not exceed the third threshold value ε3 in step S802, the threshold value exceeds the preset threshold value (warning level determination threshold value ε1) as in the first to third embodiments. It is determined whether or not (step S804).

  When the distortion amount acquired in step S801 exceeds the warning level determination threshold ε1 and is determined to be the warning level (step S804; Yes), the control unit 23 instructs the warning unit 26 to perform a warning operation. Is output. The warning unit 26 performs a warning operation according to the instruction signal (step S803). That is, when a distortion amount exceeding the warning level determination threshold ε1 is detected instead of a long-term change, a warning operation is performed.

  When the difference value between the current and past distortion amounts does not exceed the third threshold value ε3 and the distortion amount acquired in step S801 does not exceed the warning level determination threshold value ε1 (step S804; No), the control unit 23 Returns to step S801 without performing a warning operation.

As described above, in the X-ray diagnostic imaging apparatus 1 according to the seventh embodiment, a long-term change in vibration (distortion amount) from the past is left in the log, and the magnitude of the past vibration (distortion amount) and the current If the amount of strain tends to increase with the passage of time as compared with the magnitude of vibration (amount of strain), an abnormality of the apparatus can be warned.
As a result, since a change in the magnitude of vibration can be predicted and warned in advance before an abnormality occurs, a safer X-ray image diagnostic apparatus 1 can be provided.

  As described above in each embodiment, the present invention predicts and warns of an abnormality of the X-ray generator 12 that generates X-rays by monitoring the vibration (distortion amount). Thereby, since the operator can know the mechanical abnormality of the X-ray generation part 12 at an early stage, the apparatus can be used safely. Since a warning can be issued before a serious abnormality such as a failure occurs, it is possible to avoid suddenly stopping the apparatus.

  The preferred X-ray image diagnostic apparatus of the present invention has been described above in each embodiment, but the present invention is not limited to the above-described embodiment. It will be apparent to those skilled in the art that various changes or modifications can be conceived within the scope of the technical idea disclosed in the present application, and these are naturally within the technical scope of the present invention. Understood.

DESCRIPTION OF SYMBOLS 1 ... X-ray image diagnostic apparatus 2 ... Mobile X-ray apparatus 3 ... Mobile image display apparatus 4 ... Cable 5 ... Vibration detector ( Strain sensor)
DESCRIPTION OF SYMBOLS 11 ... Arm 12 ... X-ray generation part 12a ... X-ray tube apparatus 13 ... X-ray image receiving part 21 ... Traveling part 23 ... Control part 24 ... Operation unit 25 ... Storage unit 26 ... Warning unit 32 ... Display unit

Claims (11)

An X-ray generator that irradiates the subject with X-rays;
An X-ray image receiving unit that is arranged to face the X-ray generation unit and detects transmitted X-rays transmitted through the subject;
An arm for holding the X-ray generation part at one end and the X-ray image receiving part at the other end;
An arm moving mechanism for supporting and moving the arm;
A vibration detector for detecting the magnitude of vibration of the X-ray generator;
A determination unit for determining whether or not the magnitude of vibration detected by the vibration detector is a warning level;
A warning unit that performs a warning operation when the magnitude of the vibration is determined to be a warning level by the determination unit;
An X-ray diagnostic imaging apparatus comprising: The X-ray generator uses a rotating anode X-ray tube device,
The vibration detector is a strain sensor that is provided at a position straddling the arm and the X-ray generation unit and detects a strain amount at an attachment position of the X-ray generation unit with respect to the arm,
The X-ray diagnostic imaging apparatus according to claim 1, wherein the determination unit determines the warning level by regarding the amount of strain detected by the strain sensor as the magnitude of the vibration. The X-ray generator uses a rotating anode X-ray tube device,
The vibration detector is a strain sensor that is attached to a support column that supports the arm and moves up and down, and detects a strain amount of the support column.
The X-ray diagnostic imaging apparatus according to claim 1, wherein the determination unit determines the warning level by regarding the amount of strain detected by the strain sensor as the magnitude of the vibration. A storage unit that stores a detection value indicating a magnitude of vibration at the time of occurrence of abnormal sound of the X-ray generation unit detected in advance by the vibration detector as a threshold for warning level determination;
2. The determination unit according to claim 1, wherein the determination unit determines the warning level by comparing a detection value detected by the vibration detector before or during use of the apparatus with the warning level determination threshold. The X-ray image diagnostic apparatus according to claim 3. An arm position acquisition unit for acquiring an arm position changed by the arm moving mechanism;
The storage unit stores in advance arm position-specific threshold data indicating a relationship between the arm position and the warning level determination threshold,
The determination unit calculates a warning level determination threshold according to the arm position acquired by the arm position acquisition unit from the arm position threshold data before or during use of the device, and calculates the calculated warning level determination threshold The X-ray image diagnosis apparatus according to claim 4, wherein the warning level is determined by comparing the detected value detected by the vibration detector with the detected value. An X-ray condition setting unit for setting X-ray conditions;
The storage unit previously stores threshold data for each X-ray condition indicating a relationship between the X-ray condition and the threshold for warning level determination,
The determination unit calculates a warning level determination threshold value corresponding to the X-ray condition set by the X-ray condition setting unit from the X-ray condition threshold data before or during use of the device, and calculates the calculated warning. 6. The X-ray image diagnosis apparatus according to claim 4, wherein the warning level is determined by comparing a level determination threshold value with a detection value detected by the vibration detector. . A change amount calculation unit for calculating a change amount in a minute time of a detection value indicating the magnitude of vibration detected by the vibration detector;
A change amount determination unit for determining whether or not the change amount is rapidly increased,
The X-ray image according to claim 1, wherein the warning unit performs a warning operation even when the change amount determination unit determines that the change amount has rapidly increased. Diagnostic device. A carriage equipped with an X-ray diagnostic imaging apparatus;
A traveling operation unit that is operated when traveling the cart;
A travel operation detection sensor that is provided in the travel operation unit and detects an operation on the travel operation unit;
A switch for switching on / off the operation of the warning unit according to the presence or absence of an operation detected by the traveling operation detection sensor;
The X-ray image diagnostic apparatus according to claim 1, further comprising: An operation unit for operating the arm moving mechanism;
An arm operation detection sensor that is provided in the operation unit and detects an operation on the operation unit;
A switch for switching on / off the operation of the warning unit according to the presence or absence of an operation detected by the arm operation detection sensor;
The X-ray image diagnostic apparatus according to claim 1, further comprising: A log recording unit for recording a detection value indicating the magnitude of vibration detected by the vibration detector as a log;
A log that compares a current detection value detected by the vibration detector with a past detection value recorded in the log recording unit and determines whether or not a long-term change in the magnitude of the vibration is increasing. A determination unit;
10. The warning unit according to claim 1, wherein the warning unit performs a warning operation when the log determination unit determines that a long-term change in the magnitude of vibration is an upward trend. X-ray diagnostic imaging equipment. A stop determination unit that compares a preset threshold value for stopping the device with a detection value detected by the vibration detector;
A control unit that controls to stop the X-ray generation operation when a detection value indicating the magnitude of vibration detected by the vibration detector is larger than the apparatus stop threshold;
The X-ray image diagnostic apparatus according to any one of claims 1 to 10, further comprising:

Images