JPWO2019069528A1 - Mobile X-ray equipment - Google Patents

Abstract

The warning display unit is configured to store accelerations in the X, Y, and Z directions in the collimator (12) and the like detected by the accelerometer (43) when the mobile X-ray imaging apparatus is moved, and at the start of use stored in the storage unit. The accelerations in the X, Y and Z directions generated in the collimator (12) and the like detected by the accelerometer (43) are compared. Then, when the difference in acceleration in each of the X, Y, and Z directions exceeds a set value, a warning is displayed. This warning display is executed by displaying a message indicating a warning on the display/operation unit.

Description

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

Such a mobile X-ray imaging apparatus is also called an X-ray imaging apparatus for rounds, and moves between hospital rooms to perform X-ray imaging. This mobile X-ray imaging apparatus includes a carriage having front wheels and rear wheels, a pillar standing upright on the carriage, and an arm that moves up and down along the pillar while supporting an X-ray irradiation unit including an X-ray tube and a collimator. And an X-ray detector for detecting X-rays emitted from the X-ray irradiator and passing through the subject, and a battery arranged inside the carriage (see Patent Document 1).

Patent No. 5077270

In such a mobile X-ray imaging apparatus, the column that supports the X-ray tube, the collimator, and the arm is generally connected to the carriage by welding via a rotating mechanism. The collimator is supported by the arm via an X-ray tube by screwing or the like. Due to the nature of performing X-ray imaging by repeating movement, this moving X-ray imaging apparatus often places a heavy load on the X-ray tube and collimator during movement, and the pillar is unwelded and the collimator is screwed on. There is a possibility that the column will fall or the collimator will fall due to slack in the column.

For this reason, in general, before moving the mobile X-ray imaging apparatus, the operator confirms the fixed state of the support columns and collimators. However, such work is not only complicated, but quantitative determination is difficult. In addition, the operator may forget the confirmation work before the movement.

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

The invention according to claim 1 is a mobile X-ray imaging system including an X-ray irradiation unit, a carriage having wheels, and a support mechanism arranged on the carriage for supporting the X-ray irradiation unit. The apparatus is characterized by including an accelerometer arranged 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 irradiation unit includes an X-ray tube connected to the support mechanism, and a collimator supported by the X-ray tube, The accelerometer is arranged in the collimator.

According to a third aspect of the present invention, in the invention according to the second aspect, at the start of use of the device, a storage unit that stores the acceleration detected by the accelerometer when the device is moved, is provided with the warning. The display unit compares the acceleration detected by the accelerometer during the movement of the device with the acceleration stored in the storage unit, and displays a warning when the difference exceeds a set value.

The invention according to claim 4 is the invention according to claim 3, further comprising position detecting means for detecting a current position of the device, wherein the storage part is moved when the device is started to be used. Sometimes the acceleration detected by the accelerometer and the position information of the device at that time are stored, and the warning display unit stores the acceleration detected by the accelerometer when the device is moved and the storage unit. A warning is displayed based on the comparison value with the calculated acceleration and the position information at that time.

The invention according to claim 5 is the invention according to any one of claims 1 to 4, 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, the possibility of an accident such as a fall of the support mechanism or a fall of the X-ray irradiation unit is detected in advance. It is possible to prevent this.

According to the second aspect of the present invention, it is possible to detect the possibility of the collimator falling and prevent it.

According to the third aspect of the present invention, it is possible to detect an accident such as a fall of the support mechanism or a fall of the X-ray irradiation unit due to fatigue over time from the start of use of the apparatus and prevent this. It will be possible.

According to the invention described in claim 4, it is possible to more accurately compare the accelerations in a state where vibrations and the like peculiar 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 is displayed even on the outside based on the acceleration data transferred to the external server by the communication unit.

1 is a schematic side view schematically showing the configuration of a mobile X-ray imaging apparatus according to the present invention. It is a perspective view of a mobile X-ray imaging apparatus according to the present invention. It 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 radiography device.

Hereinafter, embodiments of the present invention will be described with reference to 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. Further, FIG. 2 is a perspective view of the mobile X-ray imaging apparatus according to the present invention.

This mobile X-ray imaging apparatus is also called an X-ray imaging apparatus for rounds, and moves between a plurality of patient rooms to perform an X-ray examination in each patient room. This mobile X-ray imaging apparatus includes a support 14 provided on a carriage 15, an arm 13 provided so as to be capable of moving up and down with respect to the support 14, and an X-ray provided at the tip of the arm 13. The tube 11, the collimator 12 arranged below the X-ray tube 11, the handle 26 attached to the collimator 12, and the X-ray for detecting the X-rays emitted from the X-ray tube 11 and passing through the 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 form an X-ray irradiation unit according to the present invention. Further, the column 14 and the arm 13 constitute a support mechanism according to the present invention for supporting the X-ray irradiation unit.

An accelerometer 43 is arranged inside the collimator 12 described above. The accelerometer 43 detects acceleration in the X direction (horizontal direction in FIG. 1), acceleration in the Y direction (direction perpendicular to the paper surface in FIG. 1), and acceleration in the Z direction (vertical direction in FIG. 1). It is configured to get.

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

The arm 13 can move up and down between a fixed position, which is a position where the arm 13 should be placed when moving the carriage 15 shown in FIG. 1, and a shooting position which is elevated from the fixed position shown in FIG. .. When the arm 13 is in the fixed position, the lower surface of the arm 13 contacts a lock portion 18 called an arm catch. In addition, as shown in FIG. 2, the arm 13 pivots around the support column 14 in a state where the arm 13 is elevated from the fixed position.

The mobile X-ray imaging apparatus also includes a communication unit 41 that can be connected to an access point 42 installed in the hospital by wireless communication means such as WiFi. The access points 42 are installed in various places in the hospital, and the mobile X-ray imaging apparatus according to the present invention accesses the access points 42 via the communication unit 41 to obtain information on the subject and The current position information is acquired together with the X-ray imaging information. Further, the communication unit 41 transmits various kinds of information to the access point 42. The communication unit 41 is connected to a control unit 30 which will be described later and is arranged inside 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 the mobile X-ray imaging apparatus according to the present invention.

This mobile X-ray imaging apparatus has a CPU that executes logical operations as a processor, a ROM that stores an operation program necessary for controlling the apparatus, a RAM that temporarily stores data and the like during control, and the like. 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 composed of a computer in which software is installed. The function of each unit included in the control unit 30 is realized by executing software installed in the computer. In addition, the control unit 30 is connected to the access point 42 via the communication unit 41 described above. Further, the control unit 30 includes a warning display unit 31 for executing a warning display, which will be 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. With.

The access point 42 is connected to the 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, not only the current position information is acquired together with the information of the subject and the X-ray imaging information, but also the acceleration detected by the accelerometer 43 is transferred to the external server 50 via the network 51.

Next, a warning display operation at the time of movement in the mobile X-ray imaging apparatus having the above configuration 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 indicates a change corresponding to the place where the device is arranged, the acceleration x0 in the X direction detected by the accelerometer 43 at the start of use of the device, and X1 indicates the X direction detected by the accelerometer 43 during normal use. Shows the change corresponding to the place where the device having the acceleration x1 is arranged, and XD shows the change corresponding to the place where the device having the difference xD between x0 and x1 is arranged. Further, Y0 indicates a change in acceleration Y0 in the Y direction detected by the accelerometer 43 at the start of use of the device, corresponding to a place where the device is arranged, and Y1 indicates a change in the Y direction detected by the accelerometer 43 during normal use. The change of the acceleration y1 corresponds to the place where the device is arranged, and YD shows the change corresponding to the place where the device of the difference yD between y0 and y1 is arranged. Further, Z0 indicates a change in acceleration Z0 in the Z direction detected by the accelerometer 43 at the start of use of the device, which corresponds to a place where the device is arranged, and Z1 indicates a change in the Z direction detected by the accelerometer 43 during normal use. The change corresponding to the place where the device having the acceleration z1 is arranged is shown, and ZD shows the change corresponding to the place where the device having the difference zD between z0 and z1 is arranged. Further, in these graphs, the horizontal axis represents the location of the device, and the vertical axis represents the magnitude of acceleration (the magnitude difference in XD, YD, and ZD). Note that the scales on the vertical axis are different between XD, YD, and ZD and other graphs.

When the mobile X-ray imaging apparatus is used, the mobile X-ray imaging apparatus is used at the start of use, that is, when the apparatus is purchased and then used for the first time, or after the maintenance of the apparatus is started for the first time. The mobile X-ray imaging apparatus is moved in a region where the X-ray imaging apparatus is normally used, and the acceleration in the X, Y, and Z directions generated in the collimator 12 and the like during movement is detected by the accelerometer 43 with time. The acceleration detected by the accelerometer 43 is stored in the storage unit 32 in the control unit 30 illustrated in FIG.

X0, Y0, and Z0 in FIG. 4 indicate changes in the accelerations in the X, Y, and Z directions detected by this, corresponding to the locations where the devices are arranged. The mobile X-ray imaging apparatus passes not only the flat floor surface 100 shown in FIG. 1 but also a step boundary region 101 such as a room boundary or an elevator entrance, which is schematically shown in FIG. At this time, the acceleration generated in the collimator 12 and the like becomes large. Regions with large acceleration changes in X0, Y0, and Z0 in FIG. 4 represent changes in acceleration when the mobile X-ray imaging apparatus passes through the step region 101 shown in FIG. The storage unit 32 stores the position information of the mobile X-ray imaging apparatus and the acceleration information at that time for each of the X, Y, and Z directions.

Even when the mobile X-ray imaging apparatus is moved to use the mobile X-ray imaging apparatus during normal X-ray imaging, the acceleration in the X, Y, and Z directions generated in the collimator 12 and the like is changed by the accelerometer 43 over time. To detect. X1, Y1, and Z1 in FIG. 4 indicate changes in accelerations in the X, Y, and Z directions detected at this time corresponding to the locations where the devices are arranged. The magnitude of the acceleration at this time is small on the flat floor surface 100 shown in FIG. 1 and large on the step region 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 is the accelerations x1, y1, z1 in the X, Y, and Z directions generated in the collimator 12 and the like detected by the accelerometer 43 when the mobile X-ray imaging apparatus is moved. And the accelerations x0, y0, z0 in the X, Y, Z directions generated in the collimator 12 and the like detected by the accelerometer 43 at the start of use stored in the storage unit 32 are compared. Then, when the acceleration difference xD, yD, zD in each of the X, Y, and Z directions exceeds a set value, 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. If necessary, as this warning display, a warning sound may be generated together with a message, or a warning light may be turned on. In addition to displaying such a warning, a message may be transmitted via the Internet line or the like.

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

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

When the operator moves the mobile X-ray imaging apparatus, acceleration in the X direction also occurs. However, since the acceleration in the X direction is smaller than the acceleration due to the vibration of the collimator 12 described later, it is not necessary to consider this. However, as the set value of the acceleration difference xD, a value that takes into consideration the acceleration during movement of the device may be adopted.

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

Here, in the above-described embodiment, the accelerations x1, y1, z1 in the X, Y, Z directions generated in the collimator 12 and the like detected by the accelerometer 43 when the mobile X-ray imaging apparatus is moved, and the storage unit 32. The comparison with the accelerations x0, y0, z0 in the X, Y, Z directions generated in the collimator 12 detected by the accelerometer 43 at the start of use stored in 1 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 according to the installation location of the device under the same condition.

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

Since the magnitude of the acceleration in the step area 101 is larger than the magnitude of the acceleration in the flat floor surface 100, the set values of the acceleration differences xD, yD, and zD are also flat 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 indicate examples of set values of acceleration differences xD, yD, and zD in the step region 101, and XD1, YD1, and ZD1 are accelerations on the flat floor surface 100. 3 shows an example of set values of the differences xD, yD, and zD.

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

However, such a configuration for acquiring the current position information may be omitted. In this case, continuously or in a normal traveling state, or adopt a configuration that detects a change in the acceleration every fixed time, when the acceleration more than the set value is repeatedly detected during the fixed time, It is preferable to display a warning.

Further, in the above-described embodiment, the accelerometer 43 is provided for the collimator 12, but the accelerometer 43 is provided for the X-ray tube 11 that constitutes the X-ray irradiation unit together with the collimator 12. Good. In addition, a configuration in which the accelerometer 43 is arranged on the arm 13 or the pillar 14 as a support mechanism for supporting the X-ray irradiation unit may be adopted. However, by disposing the accelerometer 43 at a position where there are more intervening portions from the carriage 15, even if the fixed state becomes unstable in any of these intervening portions, it is detected. It becomes possible.

Further, in the above-described embodiment, the acceleration in the three directions of X, Y, and Z is detected by the accelerometer 43, but the acceleration is detected only in one or two of the X, Y, and Z directions. Alternatively, a configuration for detecting

11 X-ray tube 12 Collimator 13 Arm 14 Strut 15 Bogie 16 Flat panel detector 18 Lock part 21 Front wheel 22 Rear wheel 25 Display/operation part 30 Control part 31 Warning display part 32 Memory part 41 Communication part 42 Access point 43 Accelerometer 50 Server 51 network

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

Such a mobile X-ray imaging apparatus is also called an X-ray imaging apparatus for rounds, and moves between hospital rooms to perform X-ray imaging. This mobile X-ray imaging apparatus includes a carriage having front wheels and rear wheels, a pillar standing upright on the carriage, and an arm that moves up and down along the pillar while supporting an X-ray irradiation unit including an X-ray tube and a collimator. And an X-ray detector for detecting X-rays emitted from the X-ray irradiator and passing through the subject, and a battery arranged inside the carriage (see Patent Document 1).

Patent No. 5077270

In such a mobile X-ray imaging apparatus, the column that supports the X-ray tube, the collimator, and the arm is generally connected to the carriage by welding via a rotating mechanism. The collimator is supported by the arm via an X-ray tube by screwing or the like. Due to the nature of performing X-ray imaging by repeating movement, this moving X-ray imaging apparatus often places a heavy load on the X-ray tube and collimator during movement, and the pillar is unwelded and the collimator is screwed on. There is a possibility that the column will fall or the collimator will fall due to slack in the column.

For this reason, in general, before moving the mobile X-ray imaging apparatus, the operator confirms the fixed state of the support columns and collimators. However, such work is not only complicated, but quantitative determination is difficult. In addition, the operator may forget the confirmation work before the movement.

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

The invention according to claim 1 is a mobile X-ray imaging system including an X-ray irradiation unit, a carriage having wheels, and a support mechanism arranged on the carriage for supporting the X-ray irradiation unit. In the device, an accelerometer provided in the support mechanism or the X-ray irradiation unit, and a storage unit that stores the acceleration detected by the accelerometer when the device is moved at the start of use of the device, A warning is issued based on position detection means for detecting the current position of the device, a comparison value between the acceleration detected by the accelerometer during movement of the device and the acceleration stored in the storage unit, and position information at that time. A warning display unit for displaying is provided.

The invention according to claim 2 is the invention according to claim 1, wherein the X-ray irradiation unit includes an X-ray tube connected to the support mechanism, and a collimator supported by the X-ray tube, The accelerometer is arranged in the collimator.

The invention according to claim 3 is the invention according to claim 1 or 2 , further comprising a communication unit connectable to an external server, wherein the communication unit is configured to detect the acceleration detected by the accelerometer. Transfer to an external server.

According to a fourth aspect of the present invention, there is provided a mobile X-ray imaging system including an X-ray irradiation unit, a carriage having wheels, and a support mechanism arranged on the carriage for supporting the X-ray irradiation unit. In the device, an accelerometer provided in the support mechanism or the X-ray irradiation unit, and a warning display unit that displays a warning based on the acceleration detected by the accelerometer, the X-ray irradiation unit, An X-ray tube connected to the support mechanism and a collimator supported by the X-ray tube are provided, and the accelerometer is arranged in the collimator.

According to a fifth aspect of the present invention, there is provided a mobile X-ray imaging apparatus including an X-ray irradiator, a carriage having wheels, and a support mechanism arranged on the carriage for supporting the X-ray irradiator. In the device, an accelerometer arranged in the support mechanism or the X-ray irradiation unit, a warning display unit for displaying a warning based on the acceleration detected by the accelerometer, and a communication unit connectable to an external server. And the communication unit transfers the acceleration detected by the accelerometer 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, the possibility of an accident such as a fall of the support mechanism or a fall of the X-ray irradiation unit is detected in advance. It is possible to prevent this. In addition, the accelerations are compared more accurately in a state in which vibrations and the like peculiar to the position where the device moves are excluded, and the support mechanism may fall or the X-ray irradiation part may fall due to fatigue over time from the start of use of the device. It is possible to detect an accident before it happens and prevent it.

According to the second and fourth aspects of the invention, it is possible to detect the possibility of the collimator falling and prevent it.

According to the third and fifth aspects of the present invention, it is possible to recognize that the warning is displayed even on the outside based on the acceleration data transferred to the external server by the communication unit. ..

1 is a schematic side view schematically showing the configuration of a mobile X-ray imaging apparatus according to the present invention. It is a perspective view of a mobile X-ray imaging apparatus according to the present invention. It 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 radiography device.

Hereinafter, embodiments of the present invention will be described with reference to 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. Further, FIG. 2 is a perspective view of the mobile X-ray imaging apparatus according to the present invention.

This mobile X-ray imaging apparatus is also called an X-ray imaging apparatus for rounds, and moves between a plurality of patient rooms to perform an X-ray examination in each patient room. This mobile X-ray imaging apparatus includes a support 14 provided on a carriage 15, an arm 13 provided so as to be capable of moving up and down with respect to the support 14, and an X-ray provided at the tip of the arm 13. The tube 11, the collimator 12 arranged below the X-ray tube 11, the handle 26 attached to the collimator 12, and the X-ray for detecting the X-rays emitted from the X-ray tube 11 and passing through the 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 form an X-ray irradiation unit according to the present invention. Further, the column 14 and the arm 13 constitute a support mechanism according to the present invention for supporting the X-ray irradiation unit.

An accelerometer 43 is arranged inside the collimator 12 described above. The accelerometer 43 detects acceleration in the X direction (horizontal direction in FIG. 1), acceleration in the Y direction (direction perpendicular to the paper surface in FIG. 1), and acceleration in the Z direction (vertical direction in FIG. 1). It is configured to get.

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

The arm 13 can move up and down between a fixed position, which is a position where the arm 13 should be placed when moving the carriage 15 shown in FIG. 1, and a shooting position which is elevated from the fixed position shown in FIG. .. When the arm 13 is in the fixed position, the lower surface of the arm 13 contacts a lock portion 18 called an arm catch. In addition, as shown in FIG. 2, the arm 13 pivots around the support column 14 in a state where the arm 13 is elevated from the fixed position.

The mobile X-ray imaging apparatus also includes a communication unit 41 that can be connected to an access point 42 installed in the hospital by wireless communication means such as WiFi. The access points 42 are installed in various places in the hospital, and the mobile X-ray imaging apparatus according to the present invention accesses the access points 42 via the communication unit 41 to obtain information on the subject and The current position information is acquired together with the X-ray imaging information. Further, the communication unit 41 transmits various kinds of information to the access point 42. The communication unit 41 is connected to a control unit 30 which will be described later and is arranged inside 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 the mobile X-ray imaging apparatus according to the present invention.

This mobile X-ray imaging apparatus has a CPU that executes logical operations as a processor, a ROM that stores an operation program necessary for controlling the apparatus, a RAM that temporarily stores data and the like during control, and the like. 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 composed of a computer in which software is installed. The function of each unit included in the control unit 30 is realized by executing software installed in the computer. In addition, the control unit 30 is connected to the access point 42 via the communication unit 41 described above. Further, the control unit 30 includes a warning display unit 31 for executing a warning display, which will be 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. With.

The access point 42 is connected to the 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, not only the current position information is acquired together with the information of the subject and the X-ray imaging information, but also the acceleration detected by the accelerometer 43 is transferred to the external server 50 via the network 51.

Next, a warning display operation at the time of movement in the mobile X-ray imaging apparatus having the above configuration 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 indicates a change corresponding to the place where the device is arranged, the acceleration x0 in the X direction detected by the accelerometer 43 at the start of use of the device, and X1 indicates the X direction detected by the accelerometer 43 during normal use. Shows the change corresponding to the place where the device having the acceleration x1 is arranged, and XD shows the change corresponding to the place where the device having the difference xD between x0 and x1 is arranged. Further, Y0 indicates a change in acceleration Y0 in the Y direction detected by the accelerometer 43 at the start of use of the device, corresponding to a place where the device is arranged, and Y1 indicates a change in the Y direction detected by the accelerometer 43 during normal use. The change of the acceleration y1 corresponds to the place where the device is arranged, and YD shows the change corresponding to the place where the device of the difference yD between y0 and y1 is arranged. Further, Z0 indicates a change in acceleration Z0 in the Z direction detected by the accelerometer 43 at the start of use of the device, which corresponds to a place where the device is arranged, and Z1 indicates a change in the Z direction detected by the accelerometer 43 during normal use. The change corresponding to the place where the device having the acceleration z1 is arranged is shown, and ZD shows the change corresponding to the place where the device having the difference zD between z0 and z1 is arranged. Further, in these graphs, the horizontal axis represents the location of the device, and the vertical axis represents the magnitude of acceleration (the magnitude difference in XD, YD, and ZD). Note that the scales on the vertical axis are different between XD, YD, and ZD and other graphs.

When the mobile X-ray imaging apparatus is used, the mobile X-ray imaging apparatus is used at the start of use, that is, when the apparatus is purchased and then used for the first time, or after the maintenance of the apparatus is started for the first time. The mobile X-ray imaging apparatus is moved in a region where the X-ray imaging apparatus is normally used, and the acceleration in the X, Y, and Z directions generated in the collimator 12 and the like during movement is detected by the accelerometer 43 with time. The acceleration detected by the accelerometer 43 is stored in the storage unit 32 in the control unit 30 illustrated in FIG.

X0, Y0, and Z0 in FIG. 4 indicate changes in the accelerations in the X, Y, and Z directions detected by this, corresponding to the locations where the devices are arranged. The mobile X-ray imaging apparatus passes not only the flat floor surface 100 shown in FIG. 1 but also a step boundary region 101 such as a room boundary or an elevator entrance, which is schematically shown in FIG. At this time, the acceleration generated in the collimator 12 and the like becomes large. Regions with large acceleration changes in X0, Y0, and Z0 in FIG. 4 represent changes in acceleration when the mobile X-ray imaging apparatus passes through the step region 101 shown in FIG. The storage unit 32 stores the position information of the mobile X-ray imaging apparatus and the acceleration information at that time for each of the X, Y, and Z directions.

Even when the mobile X-ray imaging apparatus is moved to use the mobile X-ray imaging apparatus during normal X-ray imaging, the acceleration in the X, Y, and Z directions generated in the collimator 12 and the like is changed by the accelerometer 43 over time. To detect. X1, Y1, and Z1 in FIG. 4 indicate changes in accelerations in the X, Y, and Z directions detected at this time corresponding to the locations where the devices are arranged. The magnitude of the acceleration at this time is small on the flat floor surface 100 shown in FIG. 1 and large on the step region 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 is the accelerations x1, y1, z1 in the X, Y, and Z directions generated in the collimator 12 and the like detected by the accelerometer 43 when the mobile X-ray imaging apparatus is moved. And the accelerations x0, y0, z0 in the X, Y, Z directions generated in the collimator 12 and the like detected by the accelerometer 43 at the start of use stored in the storage unit 32 are compared. Then, when the acceleration difference xD, yD, zD in each of the X, Y, and Z directions exceeds a set value, 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. If necessary, as this warning display, a warning sound may be generated together with a message, or a warning light may be turned on. In addition to displaying such a warning, a message may be transmitted via the Internet line or the like.

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

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

When the operator moves the mobile X-ray imaging apparatus, acceleration in the X direction also occurs. However, since the acceleration in the X direction is smaller than the acceleration due to the vibration of the collimator 12 described later, it is not necessary to consider this. However, as the set value of the acceleration difference xD, a value that takes into consideration the acceleration during movement of the device may be adopted.

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

Here, in the above-described embodiment, the accelerations x1, y1, z1 in the X, Y, Z directions generated in the collimator 12 and the like detected by the accelerometer 43 when the mobile X-ray imaging apparatus is moved, and the storage unit 32. The comparison with the accelerations x0, y0, z0 in the X, Y, Z directions generated in the collimator 12 detected by the accelerometer 43 at the start of use stored in 1 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 according to the installation location of the device under the same condition.

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

Since the magnitude of the acceleration in the step area 101 is larger than the magnitude of the acceleration in the flat floor surface 100, the set values of the acceleration differences xD, yD, and zD are also flat 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 indicate examples of set values of acceleration differences xD, yD, and zD in the step region 101, and XD1, YD1, and ZD1 are accelerations on the flat floor surface 100. 3 shows an example of set values of the differences xD, yD, and zD.

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

However, such a configuration for acquiring the current position information may be omitted. In this case, continuously or in a normal traveling state, or adopt a configuration that detects a change in the acceleration every fixed time, when the acceleration more than the set value is repeatedly detected during the fixed time, It is preferable to display a warning.

Further, in the above-described embodiment, the accelerometer 43 is provided for the collimator 12, but the accelerometer 43 is provided for the X-ray tube 11 that constitutes the X-ray irradiation unit together with the collimator 12. Good. In addition, a configuration in which the accelerometer 43 is arranged on the arm 13 or the pillar 14 as a support mechanism for supporting the X-ray irradiation unit may be adopted. However, by disposing 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 of these intervening parts, it is detected. It becomes possible.

Further, in the above-described embodiment, the acceleration in the three directions of X, Y, and Z is detected by the accelerometer 43, but the acceleration is detected only in one or two of the X, Y, and Z directions. Alternatively, a configuration for detecting

11 X-ray tube 12 Collimator 13 Arm 14 Strut 15 Bogie 16 Flat panel detector 18 Lock part 21 Front wheel 22 Rear wheel 25 Display/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 (5)

A mobile X-ray imaging apparatus comprising: an X-ray irradiation unit, a carriage having wheels, and a support mechanism arranged on the carriage for supporting the X-ray irradiation unit,
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 comprising: The mobile X-ray imaging apparatus according to claim 1,
The X-ray irradiation unit 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 arranged in the collimator. The mobile X-ray imaging apparatus according to claim 2,
At the start of use of the device, a storage unit that stores the acceleration detected by the accelerometer when the device is moved,
The warning display unit compares the acceleration detected by the accelerometer during the movement of the device with the acceleration stored in the storage unit, and displays a warning when the difference exceeds a set value. Imaging device. The mobile X-ray imaging apparatus according to claim 3,
Further comprising position detection means for detecting the current position of the device,
In the storage unit, at the start of use of the device, the acceleration detected by the accelerometer when the device is moved and the position information of the device at that time are stored,
The warning display unit is a mobile X-ray that displays a warning based on a comparison value between the acceleration detected by the accelerometer and the acceleration stored in the storage unit when the apparatus is moved, and the position information at that time. Imaging 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 outputs the acceleration detected by the accelerometer to the external server. Mobile X-ray equipment to transfer to.

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