WO2019069528A1

WO2019069528A1 - Mobile x-ray imaging device

Info

Publication number: WO2019069528A1
Application number: PCT/JP2018/026315
Authority: WO
Inventors: 中村　俊晶; 雄一朗桐山
Original assignee: 株式会社島津製作所
Priority date: 2017-10-02
Filing date: 2018-07-12
Publication date: 2019-04-11
Also published as: JP6822579B2; JPWO2019069528A1

Abstract

A warning display unit compares accelerations of a collimator (12) or the like in the X-, Y- and Z-axis directions which are detected by an acceleration meter (43) when this mobile X-ray imaging device is moved, with accelerations of the collimator (12) or the like in the X, Y and Z-axis directions which are detected by the acceleration meter (43) at the beginning of use and stored in a storage unit. When the differences between the accelerations in the X, Y and Z-axis directions exceed a set value, the warning display unit displays a warning. The display of a warning is accomplished by displaying a message showing a warning to a display/operation unit.

Description

Mobile X-ray imaging device

The present invention relates to a mobile X-ray imaging apparatus provided with an X-ray irradiator, a carriage having wheels, and a support mechanism for supporting the X-ray irradiator.

Such a mobile X-ray imaging apparatus is also referred to as a round-table X-ray imaging apparatus, which moves between patient rooms to perform X-ray imaging. The mobile X-ray imaging apparatus includes a carriage having a front wheel and a rear wheel, a support erected on the carriage, and an arm which is moved up and down along the support while supporting an X-ray irradiation unit including an X-ray tube and a collimator. And an X-ray detector for detecting an X-ray irradiated from the X-ray irradiation unit and having passed through the subject, and a battery disposed inside the carriage (see Patent Document 1).

Patent No. 5077270

In such a mobile X-ray imaging apparatus, the support for supporting the X-ray tube, the collimator and the arm is generally connected to the carriage by welding via a rotation mechanism. Further, the collimator is supported by the arm via an X-ray tube by screwing or the like. Due to the nature of this moving X-ray imaging apparatus performing repeated X-ray imaging, load is often applied to X-ray tubes and collimators that are heavy when moving, and welding of the support pillars and screwing of the collimator are performed. It is possible that the support may fall or the collimator may fall due to the slack or the like.

For this reason, generally, before moving the mobile X-ray imaging apparatus, the operator confirms the fixed state of the support column, the collimator, and the like. However, such an operation is not only complicated but also difficult in quantitative judgment. In addition, there is a possibility that the operator may forget the confirmation operation before moving.

The present invention has been made to solve the above-described problems, and provides a mobile X-ray imaging apparatus capable of detecting in advance an accident such as falling of a column or falling of a collimator and preventing such an accident. The purpose is

The invention according to claim 1 is a mobile X-ray imaging system comprising an X-ray irradiator, a carriage having wheels, and a support mechanism provided on the carriage for supporting the X-ray irradiator. The apparatus is characterized by including an accelerometer provided in the support mechanism or the X-ray irradiation unit, and a warning display unit for displaying a warning based on the acceleration detected by the accelerometer.

The invention according to claim 2 is the invention according to claim 1, wherein the X-ray irradiator comprises an X-ray tube connected to the support mechanism, and a collimator supported by the X-ray tube. The accelerometer is disposed on the collimator.

The invention according to a third aspect is the invention according to the second aspect, further comprising a storage unit for storing an acceleration detected by the accelerometer when the device is moved at the start of use of the device, the warning The display unit compares the acceleration detected by the accelerometer with the movement of the device with the acceleration stored in the storage unit, and displays a warning when the difference exceeds the set value.

The invention according to claim 4 further comprises a position detection means for detecting the current position of the device in the invention according to claim 3, wherein the storage unit moves the device at the start of use of the device. When the acceleration detected by the accelerometer and the position information of the device at that time are stored, the warning display unit stores the acceleration detected by the accelerometer at the time of movement of the device and the storage unit A warning is displayed based on the comparison value with the detected acceleration and the position information at that time.

The invention according to a fifth aspect is the invention according to any one of the first to fourth aspects, further comprising a communication unit connectable to an external server, wherein the communication unit is detected by the accelerometer. Transfer the acceleration to the external server.

According to the first aspect of the present invention, by displaying a warning based on the acceleration detected by the accelerometer, it is possible to detect in advance the possibility of an accident such as a fall of the support mechanism or a fall of the X-ray irradiation unit. Can be prevented.

According to the second aspect of the present invention, it is possible to detect in advance the possibility of the fall of the collimator and to prevent this.

According to the third aspect of the present invention, the accident such as the fall of the support mechanism or the fall of the X-ray irradiation unit due to the temporal fatigue from the start of use of the device can be detected in advance and prevented. It becomes possible.

According to the fourth aspect of the present invention, it is possible to more accurately compare accelerations in a state where vibrations and the like specific to the position where the device moves are excluded.

According to the fifth aspect of the present invention, it is possible to recognize that a warning display has been made outside also, based on acceleration data transferred to an external server by the communication unit.

FIG. 1 is a schematic side view schematically showing a configuration of a mobile X-ray imaging apparatus according to the present invention. 1 is a perspective view of a mobile X-ray imaging apparatus according to the present invention. 1 is a block diagram of a mobile X-ray imaging apparatus according to the present invention. It is a graph which shows the acceleration detected by the accelerometer 43 when moving a mobile type X-ray imaging apparatus.

Hereinafter, embodiments of the present invention will be described based on the drawings. FIG. 1 is a schematic side view schematically showing the configuration of a mobile X-ray imaging apparatus according to the present invention. FIG. 2 is a perspective view of the mobile X-ray imaging apparatus according to the present invention.

The mobile X-ray imaging apparatus is also referred to as a round-table X-ray imaging apparatus, moves between a plurality of patient rooms, and performs an X-ray examination in each room. The mobile X-ray imaging apparatus includes a column 14 disposed on the carriage 15, an arm 13 disposed to be able to move up and down with respect to the column 14, and an X-ray disposed at the tip of the arm 13. A tube 11, a collimator 12 disposed below the X-ray tube 11, a handle 26 attached to the collimator 12, and X-rays emitted from the X-ray tube 11 for detecting X-rays passing through a subject A flat panel detector 16 as an X-ray detector and a storage unit 17 for storing the flat panel detector 16 are provided. The X-ray tube 11 and the collimator 12 constitute an X-ray irradiator according to the present invention. Further, the support 14 and the arm 13 constitute a support mechanism according to the present invention for supporting the X-ray irradiator.

An accelerometer 43 is disposed inside the collimator 12 described above. This accelerometer 43 detects an acceleration in the X direction (left and right direction in FIG. 1), an acceleration in the Y direction (direction perpendicular to the sheet in FIG. 1) and an acceleration in the Z direction (vertical direction in FIG. 1). It is a configuration to gain.

The mobile X-ray imaging apparatus further includes a display / operation unit 25 including a display unit for the digital image detected by the flat panel detector 16 and a touch panel LCD that functions as an input unit for inputting various operations. Prepare. Furthermore, this mobile X-ray imaging apparatus is operated to operate the traveling direction of the cart 15 and the pair of left and right front wheels 21 which are wheels for changing the direction, the pair of left and right rear wheels 22 which are wheels for driving. And a handle 19. The rear wheel 22 is rotated by the drive of a motor (not shown) disposed in the carriage 15.

The arm 13 is capable of moving up and down between a fixed position where the arm 13 should be disposed when moving the carriage 15 shown in FIG. 1 and a photographing position elevated from the fixed position shown in FIG. . When the arm 13 is in the fixed position, the lower surface of the arm 13 abuts on the locking portion 18 called an arm catch. Further, as shown in FIG. 2, the arm 13 pivots about the support 14 in a state of being lifted from the fixed position.

The mobile X-ray imaging apparatus further includes a communication unit 41 connectable to the access point 42 installed in the hospital by wireless communication means such as Wifi. The access point 42 is installed at various places in the hospital, and the mobile X-ray imaging apparatus according to the present invention accesses the access point 42 through the communication unit 41 to obtain information on the subject and the like. The current position information is acquired together with the X-ray imaging information. Further, the communication unit 41 transmits various types of information to the access point 42. The communication unit 41 is connected to a control unit 30 described later disposed in the carriage 15. The accelerometer 43 in the collimator 12 described above is also connected to the control unit 30.

FIG. 3 is a block diagram of a mobile X-ray imaging apparatus according to the present invention.

The mobile X-ray imaging apparatus has a CPU that executes logical operations as a processor, a ROM that stores an operation program required to control the apparatus, and a RAM that temporarily stores data etc. during control. A control unit 30 that controls the entire apparatus is provided. The control unit 30 is connected to the accelerometer 43 and the display / operation unit 25 described above. The control unit 30 is configured of a computer in which software is installed. The functions of the units included in the control unit 30 are realized by executing software installed in a computer. Further, the control unit 30 is connected to the access point 42 via the communication unit 41 described above. Furthermore, the control unit 30 includes a warning display unit 31 for executing a warning display described later, and a storage unit 32 for storing the acceleration detected by the accelerometer 43 when the device is moved at the start of use of the device. And

The access point 42 is connected to an external server 50 via the network 51. The mobile X-ray imaging apparatus according to the present invention is connected to the network 51 by accessing the access point 42 via the communication unit 41. As a result, together with the information on the subject and the X-ray imaging information, not only the current position information is acquired, but also the acceleration detected by the accelerometer 43 is transferred to the external server 50 via the network 51.

Next, in the mobile X-ray imaging apparatus having the above configuration, a warning display operation at the time of movement will be described. FIG. 4 is a graph showing the acceleration detected by the accelerometer 43 when the mobile X-ray imaging apparatus is moved.

Here, X0 represents a change corresponding to the location of the device with the acceleration x0 detected by the accelerometer 43 at the start of use of the device, and X1 represents the X direction detected by the accelerometer 43 during normal use The change corresponding to the place where the device of the acceleration x1 is placed is shown, and XD shows the change corresponding to the place where the device xD of x0 and x1 is placed. In addition, Y0 shows a change corresponding to the location where the device of Y-direction acceleration y0 detected by the accelerometer 43 at the start of use of the device is disposed, and Y1 shows the Y-direction detected by the accelerometer 43 during normal use The change corresponding to the place where the device of the acceleration y1 is placed is shown, and YD is the change corresponding to the place where the device of the difference yD between y0 and y1 is placed. Furthermore, Z0 represents a change corresponding to the location of the device with z-direction acceleration z0 detected by the accelerometer 43 at the start of use of the device, and Z1 represents the Z-direction detected by the accelerometer 43 during normal use The change corresponding to the place where the device with acceleration z1 is placed is shown, and the symbol ZD shows the change corresponding to the place where the device with a difference zD between z0 and z1 is placed. And in these graphs, the horizontal axis shows the arrangement position of the device, and the vertical axis shows the magnitude of acceleration (difference in magnitude in XD, YD, ZD). The scale of the vertical axis is different between XD, YD, ZD and other graphs.

When using the mobile X-ray imaging apparatus, the mobile X-ray imaging apparatus is used at the start of use, that is, when the apparatus is purchased for the first time or when maintenance of the apparatus is first started. The mobile X-ray imaging apparatus is moved in an area where the X-ray imaging apparatus is normally used, and the acceleration in the X, Y, Z directions generated in the collimator 12 etc. during movement is detected over time by the accelerometer 43. The acceleration detected by the accelerometer 43 is stored in the storage unit 32 of the control unit 30 shown in FIG.

X0, Y0, and Z0 in FIG. 4 indicate changes in accelerations in the X, Y, and Z directions detected thereby, where the devices are disposed. The mobile X-ray imaging apparatus passes not only the flat floor surface 100 shown in FIG. 1 but also a step area 101 such as the boundary of a room schematically shown in FIG. 1 or the entrance of an elevator. At this time, the acceleration generated in the collimator 12 or the like increases. The large area of change in acceleration in X0, Y0, and Z0 in FIG. 4 represents the change in acceleration when the mobile X-ray imaging apparatus passes through the step area 101 shown in FIG. The storage unit 32 stores position information of the mobile X-ray imaging apparatus and information on the acceleration at that time for each of the X, Y, and Z directions.

Even when moving the mobile X-ray imaging apparatus in order to use the mobile X-ray imaging apparatus at the time of normal X-ray imaging, acceleration in the X, Y, and Z directions generated in the collimator 12 etc. To detect. X 1, Y 1 and Z 1 in FIG. 4 indicate changes in accelerations in the X, Y and Z directions detected at this time, corresponding to where the device is disposed. The magnitude of the acceleration at this time is small on the flat floor surface 100 shown in FIG. 1 and large in the step area 101, as in the case of X0, Y0, and Z0 in FIG.

The warning display unit 31 in the control unit 30 shown in FIG. 3 has accelerations x1, y1 and z1 in the X, Y and Z directions generated in the collimator 12 detected by the accelerometer 43 when the mobile X-ray imaging apparatus is moved. And accelerations x0, y0, z0 generated in the collimator 12 or the like detected by the accelerometer 43 at the start of use stored in the storage unit 32 are compared. Then, when the differences xD, yD, zD of the acceleration in each of the X, Y, Z directions exceed the set values, a warning is displayed. This warning display is executed by displaying a message indicating a warning on the display / operation unit 25 shown in FIGS. 2 and 3. As the warning display, a warning sound may be generated together with the message, or a warning light may be turned on, as necessary. In addition to displaying such a warning, a message may be transmitted via an internet connection or the like.

The acceleration detected by the accelerometer 43 is transferred to an external server 50 via the access point 42 and the network 51. As a result, it is possible to recognize that a warning has been displayed, etc., also outside.

In this case, a warning may be displayed when any of the acceleration differences xD, yD, zD in the X, Y, Z directions exceeds the set value, or the acceleration differences xD, yD, A warning may be displayed when one or more values of zD exceed the set value. Furthermore, a configuration may be adopted in which a warning is displayed when the sum of the acceleration differences xD, yD, zD exceeds the set value.

Also, when the operator moves the mobile X-ray imaging apparatus, an acceleration in the X direction is generated. However, since the acceleration in the X direction is smaller than the acceleration due to the vibration or the like of the collimator 12 described later, it is not necessary to take this into consideration. However, as the set value of the acceleration difference xD, one may be adopted in consideration of the acceleration at the time of movement of the device.

With the above-described configuration, it can be recognized that the acceleration generated in the collimator 12 is increased by a certain amount or more as compared with the start of use of the device. In general, when the fixation of the collimator 12 to the X-ray tube 11, the fixation of the X-ray tube 11 to the arm 13, the fixation of the arm 13 to the support 14, and the fixation of the support 14 to the carriage 15 become unstable, In the movement of the collimator 12, the collimator 12 shakes and the acceleration generated on the collimator 12 increases. By detecting this with the accelerometer 43, it becomes possible to detect in advance an accident such as the fall of the support column 14 or the drop of the collimator 12 and prevent this.

Here, in the above-described embodiment, when the mobile X-ray imaging apparatus is moved, accelerations x1, y1, z1 in the X, Y, Z directions generated in the collimator 12 or the like detected by the accelerometer 43, and the storage unit 32. The comparison with the accelerations x0, y0 and z0 in the X, Y and Z directions generated in the collimator 12 or the like detected by the accelerometer 43 at the start of use stored in is preferably performed in the same installation location of the device. That is, as shown in FIG. 4, the acceleration detected by the accelerometer 43 is small on the flat floor surface 100 shown in FIG. Therefore, it is preferable to compare different accelerations depending on the installation location of the device under the same conditions.

For this reason, the warning display unit 31 determines the difference xD, yD, zD of the acceleration, which is a comparison value between the acceleration detected by the accelerometer 43 at the time of movement of the device and the acceleration stored in the storage unit 32, and the position at that time. A configuration for displaying a warning based on the information is adopted.

Since the magnitude of the acceleration in the step area 101 is larger than the magnitude of the acceleration on the flat floor surface 100, the set values of the acceleration differences xD, yD, zD are also flat on the floor surface 100 in the step area 101. It is preferable to make it larger. XD2, YD2 and ZD2 in the graphs XD, YD and ZD in FIG. 4 show an example of setting values of acceleration differences xD, yD and zD in the step area 101, and XD1, YD1 and ZD1 indicate acceleration on the flat floor 100 4 shows an example of setting values of differences xD, yD, zD.

In the embodiment described above, the current position information is acquired using the access point 42 and the communication unit 41 connectable by wireless communication means such as Wifi, but using GPS (Global Positioning System) or the like The current position information of the device may be acquired by

However, the configuration for acquiring such current position information may be omitted. In this case, a configuration is employed in which changes in acceleration are detected continuously or at regular intervals in a normal traveling state, and when an acceleration equal to or greater than a set value is repeatedly detected during a regular time, It is preferable to display a warning.

In the embodiment described above, the accelerometer 43 is provided for the collimator 12. However, the accelerometer 43 is provided for the X-ray tube 11 that constitutes the X-ray irradiator together with the collimator 12. It is also good. Alternatively, the accelerometer 43 may be provided on the arm 13 or the support 14 as a support mechanism for supporting the X-ray irradiator. However, by arranging the accelerometer 43 at a position where there are more intervening parts from the carriage 15, even if the fixed state becomes unstable in any region of those intervening parts, it is detected. It becomes possible.

Furthermore, in the above-described embodiment, the acceleration in the three directions of X, Y and Z is detected by the accelerometer 43. However, in the X, Y and Z directions, the acceleration in only one direction or two directions is You may employ | adopt the structure which detects.

DESCRIPTION OF SYMBOLS 11 X-ray tube 12 Collimator 13 Arm 14 Post 15 Carriage 16 Flat panel detector 18 Lock part 21 Front wheel 22 Rear wheel 25 Display and operation part 30 Control part 31 Warning display part 32 Storage part 41 Communication part 42 Access point 43 Accelerometer 50 Server 51 Network

Claims

A mobile X-ray imaging apparatus comprising: an X-ray irradiator; a cart having wheels; and a support mechanism provided on the cart for supporting the X-ray irradiator,
An accelerometer disposed in the support mechanism or the X-ray irradiation unit;
A warning display unit that displays a warning based on the acceleration detected by the accelerometer;
A mobile X-ray imaging apparatus characterized by comprising:
In the mobile X-ray imaging apparatus according to claim 1,
The X-ray irradiator includes an X-ray tube connected to the support mechanism, and a collimator supported by the X-ray tube.
The accelerometer is a mobile X-ray imaging apparatus disposed on the collimator.
The mobile X-ray imaging apparatus according to claim 2
At the start of use of the device, there is provided a storage unit for storing the acceleration detected by the accelerometer when the device is moved,
The warning display unit compares the acceleration detected by the accelerometer with the movement of the device with the acceleration stored in the storage unit, and displays a warning when the difference exceeds a set value. Shooting device.
In the mobile X-ray imaging apparatus according to claim 3,
It further comprises position detection means for detecting the current position of the device,
The storage unit stores, at the start of use of the device, an acceleration detected by the accelerometer when the device is moved, and position information of the device at that time.
The warning display unit is a mobile X-ray that displays a warning based on a comparison value of the acceleration detected by the accelerometer at the time of movement of the device and the acceleration stored in the storage unit and position information at that time. Shooting device.
The mobile X-ray imaging apparatus according to any one of claims 1 to 4, further comprising a communication unit connectable to an external server, wherein the communication unit is configured to detect an acceleration detected by the accelerometer. Mobile X-ray imaging device to transfer to.