JP6133141B2 - X-ray image diagnostic apparatus and X-ray apparatus - Google Patents

Description

  The present invention relates to an X-ray image diagnostic apparatus and an X-ray apparatus, and more particularly to temperature monitoring of an X-ray apparatus (for example, an X-ray tube apparatus or a high voltage generator) used in the 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. In order to generate X-rays with the X-ray tube, a high voltage is applied to the X-ray tube apparatus. For this reason, when a large amount of X-rays is generated for a long time, the heat generation of the high-voltage generator and the X-ray tube device increases. The X-ray tube device and the high voltage generator are filled with electrical insulating oil, but the electrical insulating oil becomes hot when used for a long time. This is due to the heat generated by the X-ray tube and other transformer coils in the case of the X-ray tube device, and due to the temperature rise of the wave tail cutoff circuit in the case of the high voltage generator.

  For example, in the case of an X-ray tube device, a passive element such as a semiconductor or a capacitor that is sensitive to heat or a transformer is accommodated inside, but if the temperature of the internal electrical insulating oil becomes high, the passive element or transformer It will cause performance degradation. In addition, when the temperature of the electrical insulating oil exceeds the allowable temperature of the X-ray tube, there is a possibility that discharge occurs frequently and the operation of the X-ray tube device becomes unstable. Further, when the temperature of the electric insulating oil is extremely increased, the electric insulating oil becomes sludge, and there is a problem that the pressure resistance of the electric insulating oil itself is impaired. Similarly, in the case of a high-voltage generator, there is a concern about malfunction due to deterioration of internal components and a decrease in safety.

  In order to prevent the influence of such a high temperature, a temperature detection component such as a thermistor or a thermostud is usually attached to the surface of an X-ray tube device or a high voltage generator (hereinafter referred to as an X-ray device). Control is performed so that the irradiation is automatically interrupted. However, since the X-ray apparatus has a characteristic that the upper surface is likely to become the highest temperature, in an apparatus in which the X-ray apparatus can take various postures such as an X-ray diagnostic imaging apparatus, all the surfaces that can be the upper surface are provided. A temperature sensing component must be installed. Then, a large number of thermistor and thermostud cables are attached around the apparatus, the risk of cable breakage increases, care must be taken, and maintenance becomes difficult.

  Therefore, for example, in Patent Document 1, the volume of the electrical insulating oil corresponding to a predetermined allowable maximum temperature of the electrical insulating oil and the amount of elongation of the bellows corresponding to the volume are obtained. Mount the protrusion and micro switch at the position where the protrusion pushes up the lever of the micro switch, and if the control unit that received the output signal of the micro switch reaches the maximum temperature of the electrical insulating oil, it will be constant to prevent further temperature rise An X-ray high voltage generator that restricts or stops the operation is disclosed. As a result, the operation of the apparatus is controlled by a single switch without attaching temperature detection components to a plurality of surfaces.

JP 2012-146530 A

  However, since the X-ray high voltage generator described in Patent Document 1 detects and controls only when the maximum allowable temperature of the electrical insulating oil is reached, the latest temperature information and processing before reaching the maximum allowable temperature are possible. The amount cannot always be presented to the user. For this reason, it is difficult for the operator to always grasp the temperature state of the X-ray apparatus and change the number of times of imaging and the X-ray dose according to the situation.

  The present invention has been made in view of the above-described problems, and the object of the present invention is to constantly monitor the temperature information of the X-ray apparatus by a detection component attached at one place and to reduce the latest processable amount. An X-ray diagnostic imaging apparatus and an X-ray apparatus that can be presented to a user are provided.

In order to achieve the above-described object, the first invention includes a housing to which an elastic member is attached,
An X-ray apparatus comprising: electrical insulating oil sealed in the housing; and one detection component that detects a deformation amount of the stretchable member due to heat of the electrical insulating oil; and a temperature in the housing A storage unit that holds data indicating a relationship with the deformation amount; a monitoring unit that monitors the temperature inside the housing based on the deformation amount detected by the detection component and the data stored in the storage unit; The elastic member is attached to extend toward the outside of the housing, the housing includes a cover that covers the elastic member, and the detection component is a distance attached to the inner wall of the cover An X-ray diagnostic imaging apparatus characterized by being a sensor .
Moreover, 2nd invention detects the deformation | transformation amount of the said elastic member by the heat | fever of the housing | casing with which the elastic member was attached, the inside of the said housing | casing, and the heat | fever of the said electrical insulating oil 1 Stored in the storage unit, a storage unit that holds data indicating a relationship between the temperature in the housing and the deformation amount, and the deformation amount detected by the detection component. And a monitoring unit that monitors the temperature inside the housing based on the data being stored, the elastic member is provided to expand and contract inside the housing, and the detection component is provided on the elastic member. The X-ray diagnostic imaging apparatus is a distance sensor attached to a position spaced from the inner surface.

Moreover, 3rd invention detects the deformation | transformation amount of the said elastic member by the heat | fever of the housing | casing to which the elastic member was attached, the electrical insulation oil enclosed in the said housing | casing, and the said electrical insulation oil A detection component attached at one location, and the elastic member is attached to extend toward the outside of the casing, and the casing includes a cover covering the elastic member, and the detection The component is an X-ray apparatus characterized in that the component is a distance sensor attached to the inner wall of the cover .
Moreover, 4th invention detects the deformation | transformation amount of the said elastic member by the heat | fever of the housing | casing to which the elastic member was attached, the inside of the said housing | casing, and the heat | fever of the said electrical insulating oil. A detecting component attached to one location, and the elastic member is provided so as to expand and contract inside the casing, and the detecting component is located at a position spaced from the inner surface of the elastic member. It is an X-ray apparatus characterized by being an attached distance sensor.

  According to the present invention, there is provided an X-ray diagnostic apparatus and an X-ray apparatus capable of constantly monitoring temperature information of an X-ray apparatus by a detection component attached at one place and presenting the latest processable amount to a user. be able to.

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 according to the present invention. The block diagram which shows typically an example of the structure of the X-ray tube apparatus 102 from which a bellows extends outside The figure explaining the attachment example in the case of using the distance sensor 50 as a temperature detection component, and the distance between bellows-sensors. (A) When the bellows is extended, (b) When the bellows is contracted. Functional block diagram related to temperature monitoring control of the X-ray tube apparatus 102 The flowchart explaining the flow of the temperature monitoring process which the control part 23 performs The figure which shows the relationship between detection temperature and fluoroscopy possible time Mounting example when using the strain sensor 51 as a temperature detection component The figure explaining the amount of distortion of the bellows surface. (A) When bellows contracts, (b) When bellows is extended Mounting example of temperature detection component (distance sensor 50b) in the X-ray tube apparatus 102b attached so that the bellows expands and contracts in the housing Mounting example of temperature detection component (strain sensor 51c) in the X-ray tube apparatus 102c mounted so that the bellows expands and contracts in the housing

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The present invention relates to all the X-ray apparatuses in which an extensible member (bellows) is attached to a part of the casing in order to cope with the expansion accompanying the temperature rise of the electrical insulating oil 47 filled in the apparatus, and to this The present invention can be applied to all X-ray diagnostic imaging apparatuses equipped with various types of X-ray apparatuses. An X-ray apparatus is an apparatus for generating X-rays, such as an X-ray tube apparatus or a high voltage generator. In the following description, an X-ray tube apparatus will be described as an example of the X-ray apparatus.

  Further, as a preferred embodiment of the X-ray image diagnostic apparatus according to the present invention, a mobile X-ray fluoroscopic apparatus will be described as an example. However, the X-ray image diagnostic apparatus according to the present invention is limited to the X-ray fluoroscopic apparatus. It is not something. For example, an X-ray imaging apparatus that irradiates a subject with X-rays to capture an X-ray image that is a still image, or a tomographic image of a subject by irradiating X-rays from each direction around the body axis of the subject The present invention can be applied to an X-ray CT apparatus for imaging. 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, a schematic configuration of the mobile X-ray fluoroscopic apparatus 1 according to the present embodiment will be described with reference to FIG. FIG. 1 is a schematic configuration diagram of a mobile X-ray fluoroscopic apparatus 1.

  The mobile X-ray fluoroscopic apparatus 1 is an apparatus in which an X-ray fluoroscopic apparatus is mounted on a carriage so as to be movable. The X-ray fluoroscopic imaging apparatus 1 has a fluoroscopic function for continuously irradiating a subject with X-rays to generate an X-ray image (perspective image) including a moving image, and irradiates the subject with X-rays for a moment and is stationary. And a general imaging function for generating an X-ray image composed of an image.

  As shown in FIG. 1, the mobile X-ray fluoroscopic apparatus 1 includes a mobile X-ray apparatus 2 including an X-ray tube apparatus 102 and an X-ray image receiving apparatus 103, and a display unit 32 that displays an X-ray image. And the movable 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 mobile X-ray fluoroscopic imaging 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 mobile X-ray apparatus 2 includes the image display apparatus. May be a mobile X-ray fluoroscopic imaging apparatus that is integrally provided.

  The mobile X-ray apparatus 2 includes an arm 101 that supports the X-ray tube apparatus 102 and the X-ray image receiving apparatus 103 connected to each other in a state of being opposed to each other, and an arm 101 that is rotatably and movablely connected to the main body 22. The arm support part 26 which performs and the traveling part 21 which moves the main-body part 22 on a floor surface are provided. The traveling unit 21 includes a front wheel 21a and a rear wheel 21b.

  In FIG. 1, the arm 101 is formed in an arc shape, that is, a substantially C shape, but is not limited to this shape. The arm 101 may have any shape as long as the X-ray tube device 102 and the X-ray image receiving device 103 are connected and supported in a state of facing each other.

  At one end of the arm 101, the X-ray tube device 102 is fixed to the arm 101 while being placed on the arm 101. One end portions of the X-ray tube device 102 and the arm 101 are covered with an X-ray tube device cover 201. An X-ray stop 301 for limiting an X-ray irradiation area is provided at a position facing the X-ray tube image receiving device 103 in the X-ray tube device 102.

  The X-ray image receiving apparatus 103 detects X-rays generated from the X-ray tube apparatus 102 and outputs an electrical signal corresponding to the X-ray intensity. The X-ray image receiving apparatus 103 is an apparatus 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 apparatus 103 is connected to the other end of the arm 101 so as to be rotatable (rotated in the direction of arrow A in FIG. 1) in a horizontal plane. An X-ray image receiving device cover 202 is provided at the other end of the arm 101, and the X-ray image receiving device 103 is installed therein.

  The arm support part 26 supports the arm 101 so as to be rotatable and movable with respect to the main body part 22. The rotation direction includes a rotation direction in the horizontal plane (arrow B direction in FIG. 1) and a rotation direction in the vertical plane (arrow C direction in FIG. 1). When rotating along the arrow C direction, the positions of the X-ray tube device 102 and the X-ray image receiving device 103 are reversed in the vertical direction.

  Further, the moving direction is a forward / backward direction (in the direction of arrow D in FIG. 1) with respect to the main body portion 22 in a horizontal plane, a direction orthogonal to the forward / backward direction (in the direction of arrow E in FIG. 1), and an ascending / descending direction (in FIG. 1). Arrow F direction).

  Moreover, the arm support part 26 supports the arm 101 so that a slide is possible along the circular arc of the arm 101 (arrow H direction of FIG. 1).

  The main body 22 includes a control unit 23 that controls the operation of each component including the X-ray tube device 102, the X-ray image receiving device 103, and the arm support unit 26, an operation unit 24 that receives an input operation by an operator, and a control And a storage unit 25 for storing various data necessary for the operation. The operation unit 24 and the storage unit 25 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 controls the operation of X-ray irradiation based on the input signal input from the operation unit 24, detects X-rays transmitted through the subject (hereinafter abbreviated as “transmitted X-ray”), and collects data. The operation is controlled, and the rotation and movement operations of the arm 101 are controlled. The arm 101 may be rotated and moved according to control by the control unit 23, or may be rotated and moved by a manual operation by an operator.

  The storage unit 25 stores programs related to shooting, various shooting conditions, programs and data necessary for temperature monitoring control described later, and the like.

  The traveling unit 21 includes a front wheel 21a and a rear wheel 21b. In addition, the traveling unit 21 may include a driving device that motor-drives the wheel 21a (or 21b) and a braking device. The motor drive may drive both wheels 21a and 21b, but may drive only one wheel and the other may be constituted by a self-propelled caster.

  The mobile image display device 3 acquires an electrical signal (transmission X-ray data) corresponding to the transmission X-ray read from the X-ray image receiving device 103 according to the operation control of the control unit 23 via the cable 4, An image processing unit 31 that generates an X-ray image of the subject based on the transmitted X-ray data, and a display unit 32 that includes a CRT, a liquid crystal panel, and the like and displays the X-ray image of the subject. In the example of 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, 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.

FIG. 2 is a diagram schematically showing an example of the structure of the X-ray tube apparatus 102.
Inside the housing 41 of the X-ray tube apparatus 102, an inverter 42, a transformer unit 43, a booster circuit 44, an X-ray tube 45, and the like are arranged as components for generating and irradiating X-rays. The casing 41 is filled with an electric insulating oil 47 in a vacuum state and sealed. Since FIG. 2 is a schematic diagram of each component, the size, shape, arrangement, and the like of the inverter 42, the transformer unit 43, the booster circuit 44, the X-ray tube 45, etc. do not have to match those in FIG. Good.

A bellows (expandable member) 46 is attached to a part of the casing 41 as an expansion absorbing component for coping with expansion associated with the temperature rise of the electrical insulating oil 47.
In the example of FIG. 2, the bellows 46 is provided so as to extend outside the housing 41.
The bellows 46 is connected so that the internal space communicates via an oil passage port 48 provided on one surface of the housing 41. The material of the bellows 46 is formed of, for example, an oil resistant rubber or a metal with good heat dissipation such as aluminum having a bellows structure. FIG. 2 shows an example of a bellows 46 made of oil resistant rubber. The electrical insulating oil 47 moves freely between the casing 41 and the bellows 46 in both directions. A bellows cover 49 is attached to the casing 41 so as to cover the bellows 46. The bellows cover 49 is formed using a material that does not change its shape during use of the apparatus, such as metal.

  2 shows an X-ray tube device 102 in which an inverter 42, a transformer unit 43, a booster circuit 44, and an X-ray tube 45 are arranged as an embodiment of the X-ray device. It is not limited. The X-ray apparatus is an apparatus for generating X-rays or generating a high voltage for generating X-rays, and can be applied to all apparatuses in which an electrical insulating oil 47 is enclosed. For example, there are an X-ray tube apparatus in which the booster circuit 44 is not mounted, an X-ray tube apparatus mainly enclosing only an X-ray tube, and a high voltage generator without an X-ray tube. Some high voltage generators are provided with a wave tail cut-off circuit for discharging charges stored in a capacitor or the like. The present invention can also be applied to this type of high voltage generator (X-ray apparatus).

The distance sensor 50 is a component that detects the deformation amount of the bellows 46.
The distance sensor 50 includes, for example, a light source and a light receiving element. Light (including infrared rays) irradiated from the light source is reflected by the light receiving element, and the reflected light is evaluated and calculated. It is a device that outputs in terms of distance.

  FIG. 3 shows an example of attachment when the distance sensor 50 is used as a temperature detection component. 3A shows a state in which the bellows 46 is expanded (swelled), and FIG. 3B shows a state in which the bellows 46 is contracted. In FIG. 3, the inverter 42, the transformer unit 43, the booster circuit 44, the X-ray tube 45 and the like provided in the housing 41 are not illustrated.

The distance sensor 50 is attached to the inner wall of the bellows cover 49 and measures the distance between the distance sensor 50 and the bellows 46 (bellows-sensor distance). The bellows 46 and the distance sensor 50 are attached at a predetermined interval so that the non-contact state can be maintained even when the bellows 46 is fully extended.
By measuring data indicating the relationship between the temperature in the X-ray apparatus 1 (housing 41) and the bellows-sensor distance in advance and holding it in the storage unit 24, the data was measured by the distance sensor 50 when the apparatus was used. The temperature inside the housing 41 of the X-ray apparatus 1 can be calculated from the bellows-sensor distance.

  FIG. 4 is a block diagram showing the flow of signals in the temperature monitoring control, and FIG. 5 is a flowchart for explaining the flow of temperature monitoring processing executed by the control unit 23 of the mobile X-ray fluoroscopic apparatus 1. FIG. 6 is a graph showing the temperature rise with respect to the elapsed time from the start of use of the apparatus.

  As shown in FIG. 4, measurement information of the bellows-sensor distance is input from the distance sensor 50 provided in the X-ray tube apparatus 102 to the control unit 23. The control unit 23 calculates temperature information from the measurement information input from the distance sensor 50. At this time, the control unit 23 refers to data indicating the relationship between the temperature stored in the storage unit 25 and the bellows-sensor distance, and obtains a temperature corresponding to the input bellows-sensor distance.

  When calculating the temperature information, the control unit 23 preferably calculates the temperature information in consideration of various factors other than the relationship between the bellows-sensor distance and the temperature. The various elements include, for example, a shape change of the bellows 46 with respect to the posture of the arm 101. Since the electric insulation oil 47 is sealed after the inside of the casing 41 is evacuated, it is considered that the influence of gravity on the change in the shape of the bellows 46 is considered to be small, but there is still a slight influence on the shape of the bellows 46 due to its own weight and the like. Therefore, it is desirable to consider the influence of gravity.

  The control unit 23 calculates various display information based on the measured temperature information, and outputs the calculated temperature information and various display information related to the temperature information to the display unit 32. The display information includes a future processable amount (perspective viewable time, the number of images that can be taken), an irradiable X-ray condition, a control status such as fluoroscopy and imaging disabled / returned, and the like. Further, the control unit 23 determines whether or not the bellows-sensor distance measured by the distance sensor 50 has reached a value corresponding to the allowable maximum temperature stored in the storage unit 25 in advance, and according to the determination result. Switch the X-ray operation. At this time, display information indicating whether fluoroscopy / photographing is possible or not is generated and output to the display unit 32.

Next, the temperature monitoring process will be described with reference to FIG.
The control unit 23 reads the measurement information (bellows-sensor distance) of the distance sensor 50, and collates it with data indicating the relationship between the temperature and the bellows-sensor distance stored in the storage unit 25 (step S101). Thereby, the temperature information in the housing 41 is obtained.

The control unit 23 determines whether or not the temperature information obtained in step S101 has reached an allowable maximum temperature (step S102). At this time, the control unit 23 may set the allowable maximum temperature in anticipation of an X-ray irradiation amount sufficient to complete a certain treatment until the use can be interrupted.
If the allowable maximum temperature has not been reached (step S102; No), the remaining processable amount (perspective viewable time, number of shootable images) is calculated from the current temperature information and displayed on the display unit 32 (step S103). Further, the control unit 23 obtains display information such as the limitation of the irradiable X-ray condition and the control status, and displays the information on the display unit 32.

  The limitation of the irradiable X-ray condition is an X-ray condition that is limited so that irradiation can be performed even if the image quality is lowered. For example, when the X-ray condition for irradiating a high X-ray dose immediately exceeds the maximum allowable temperature, but the X-ray condition restricts the X-ray dose in the case where the low X-ray dose can be continuously irradiated. . The control unit 23 calculates the X-ray condition limited according to the required number of shots and image quality, and the difference between the current temperature and the allowable maximum temperature, and displays the X-ray condition on the display unit 32. In addition, the control status includes the current X-ray fluoroscopic imaging apparatus 1 such as “perspective / imaging is possible”, “perspective is possible / non-imaging”, “perspective / imaging is not possible”, “stop”, “return”, and the like. This is information indicating the control status. As another example of the display method of the control status, when the operator sets each element of the X-ray condition (tube current, tube voltage, irradiation time, mode, whether or not pulse fluoroscopy, the condition if pulse fluoroscopy, etc.) In view of the combination, a method may be considered in which the lamp provided in the operation unit 24 is turned on to notify that the X-ray condition is too high when the boundary of the X-ray condition restricted at that time is exceeded.

Here, the processable amount (the fluoroscopic time, the number of shootable images) will be described with reference to FIG.
In the graph of FIG. 6, a solid line indicates a temperature change (actual result) by actual photographing, and a dotted line indicates a predicted change value.

  The mobile X-ray fluoroscopic apparatus 1 has a fluoroscopic function and a general imaging function. In fluoroscopic imaging, since a relatively low X-ray dose is generally irradiated, the rate of temperature rise is not so great. However, in general imaging, the temperature rises rapidly because a high X-ray dose is applied. Therefore, when general imaging is performed during fluoroscopic imaging, the temperature rises abruptly as shown by the steps shown in the graph of FIG. Based on the difference between the actual value, the current temperature, and the allowable temperature, the control unit 11 obtains the remaining shootable time (perspective viewable time) for fluoroscopic imaging and the number of shootable times for general imaging.

  As described above, in the X-ray fluoroscopic apparatus 1 of the present embodiment, the current temperature is constantly monitored, and the remaining processable amount is always displayed from the current temperature. However, the operator can manually change the number of future radiographs and X-ray conditions as needed with reference to the display information.

  If it is determined in step S102 that the allowable maximum temperature has been reached (step S102; Yes), the control unit 23 displays on the display unit 32 that the allowable maximum temperature has been reached (step S104).

  Furthermore, the control unit 23 controls to a state in which only X-ray irradiation can be performed to complete a certain treatment until the use can be interrupted. Thereafter, the X-ray irradiation function is completely stopped after a certain amount of X-rays are irradiated (step S105).

Even after stopping the X-ray irradiation function, the control unit 23 monitors the temperature information based on the measurement information from the distance sensor 50.
When a certain amount of time has elapsed after the X-ray irradiation function is stopped and the control unit 23 detects that the temperature has been cooled to a preset restartable temperature, the control unit 23 restarts the X-ray irradiation function (step S106). At this time, the control unit 23 may calculate the remaining fluoroscopic time and the number of images that can be photographed, and display them on the display unit together with the “return” status display.
The control unit 11 repeatedly performs the processes in steps S101 to S106 while the apparatus power is on.

  As described above, the control unit 11 determines the distance (bellows-sensor distance) between the distance sensor 50 and the bellows 46 by the distance sensor 50 provided on the inner wall of the bellows cover 49 of the X-ray tube apparatus 102. Measure and obtain temperature information based on the measured bellows-sensor distance. Therefore, the temperature inside the apparatus can be monitored by the detection component attached at one place. In addition, since the calculated temperature information, control information corresponding to the temperature, fluoroscopic time, number of shootable images, and the like are calculated and displayed on the display unit 32, the operator always sets the temperature before reaching the maximum allowable temperature. It is possible to monitor and grasp information necessary for X-ray conditions.

[Second Embodiment]
In the first embodiment, the distance sensor 50 that detects the deformation amount of the bellows 46 is used as the temperature detection component. However, the present invention is not limited to this. What is necessary is just to be able to detect the deformation amount of the bellows 46 accompanying the temperature rise inside the housing 41.

  FIG. 7 shows an X-ray tube apparatus 102a that uses a strain sensor 51 as a temperature detection component. Note that the X-ray tube apparatus 102a includes an inverter 42, a transformer unit 43, a booster circuit 44, an X-ray tube 45, and the like as components for irradiating X-rays, similarly to the X-ray tube apparatus 102 of the first embodiment. Although not shown in FIG. 7 (see FIG. 2).

  The strain sensor 51 has, for example, a structure in which a metal (resistor) is attached on a thin electrical insulator, and applies the principle that the resistance value changes when the metal expands and contracts, and uses the strain amount of the measurement target as a voltage signal. It is to detect.

  As shown in FIGS. 7 and 8, the strain sensor 51 is attached to the surface of the bellows 46. The attachment location may be any location as long as expansion or contraction occurs when the shape of the bellows 46 changes.

  A strain sensor 51 is attached to the surface of the bellows 46 as shown in FIG. When the temperature of the electrical insulating oil 47 inside the bellows 46 rises, the bellows 46 surface 51 expands and distortion occurs as shown in FIG. The strain sensor 51 measures the amount of distortion (deformation amount) on the surface of the bellows 46 and outputs it to the control unit 23.

  The storage unit 25 stores data indicating the relationship between the temperature measured in advance in the housing 41 of the X-ray tube apparatus 102 and the amount of strain on the surface of the bellows 46. The control unit 23 refers to data indicating the relationship between the temperature stored in the storage unit 25 and the strain amount of the surface of the bellows 46, and calculates a temperature corresponding to the measured strain amount. Also in the second embodiment, the signal flow and processing procedure are the same as in the case of using the distance sensor 50 (FIGS. 4 and 5).

[Third Embodiment]
In the first and second embodiments, the X-ray tube device 102 is shown in which the bellows 46 is attached so as to expand and contract outside the housing 41. However, in the third embodiment, the bellows 46 is not a housing. The X-ray tube device 102b housed inside the body 41 will be described.

  FIG. 9 is a diagram schematically illustrating the X-ray tube apparatus 102b according to the third embodiment. Note that the X-ray tube apparatus 102b, like the X-ray tube apparatus 102 (FIG. 2) of the first embodiment, is an inverter 42, a transformer unit 43, a booster circuit 44, an X-ray tube as components that irradiate X-rays. Although it has a sphere 45 or the like, it is not shown in FIG.

  As shown in FIG. 9, in the X-ray tube apparatus 102b of the third embodiment, a bellows 46b is housed inside the housing. The bellows 46 b is attached to a vent 57 provided in the housing 41 with an opening. Thereby, outside air is taken in into the bellows 46b. A space inside the casing 41 and outside the bellows 46b is filled with electrical insulating oil 47. When the temperature of the electrical insulating oil 47 rises, the electrical insulating oil 47 expands and the bellows 46b contracts.

  Also in the X-ray tube apparatus 102b having such a configuration, the distance sensor 50b can be used as a component for detecting the deformation amount of the bellows 46b. The distance sensor 50b is installed inside the bellows 46b so as to have a predetermined distance from the inner surface of the bellows 46. At this time, the distance sensor 50b may be attached using a support rod 55 or the like protruding from the vicinity of the vent 57 of the housing 41. The distance sensor 50 b detects the distance from the inner wall of the bellows 46 b and outputs measurement information to the control unit 23.

  In addition, as shown in FIG. 10, a strain sensor 51b may be attached to a portion where the inner surface of the bellows 46b expands and contracts, and the strain amount (deformation amount) of the inner surface of the bellows 46b may be detected by the strain sensor 51c. . The strain sensor 51 c detects the deformation amount of the bellows 46 b and outputs measurement information to the control unit 23.

  The X-ray tube device 102c shown in FIG. 10 has a bellows 46b housed inside the housing 41, like the X-ray tube device 102b of FIG. In FIG. 10, components that irradiate X-rays (inverter 42, transformer 43, booster circuit 44, X-ray tube 45, etc.) are not shown.

  Also in the third embodiment, the control unit 23 determines the relationship between the bellows-sensor distance or the amount of distortion stored in the storage unit 25 and the temperature in the housing 41 as in the first embodiment. Based on this, a temperature corresponding to the measured bellows-sensor distance (or strain) is calculated. Further, the processable amount and the irradiable X-ray condition are calculated and displayed based on the calculated temperature information, and the operation of the X-ray tube apparatus is controlled. The signal flow and processing procedure are the same as in the first embodiment (FIGS. 4 and 5).

  As described above in each embodiment, the present invention can monitor accurate temperature information of the X-ray apparatus by a temperature detection component (a distance sensor or a strain sensor) attached to one place. Even before the maximum allowable temperature is reached, the operator can obtain and present the remaining processable amount (the fluoroscopic time and the number of images that can be captured) and suitable X-ray conditions based on the temperature information being monitored. Can check future shooting plans and change them accordingly.

  As mentioned above, in each embodiment, although the suitable X-ray image diagnostic apparatus and X-ray apparatus of this invention were demonstrated, this invention is not limited to the above-mentioned 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 ... Mobile X-ray fluoroscopic apparatus 2 ... Mobile X-ray apparatus 3 ... Mobile image display apparatus 101 ... Arm 102 ... X-ray tube apparatus 103- ··· X-ray tube image receiving device 23 ··· Control unit 24 ··· Operation unit 25 · · · Storage unit 32 · · · Display unit 41 · · · Case 42 · · · Inverter 43 · · · ... Transformer 44 ... Boosting circuit 45 ... X-ray tube 46 ... Bellows 47 ... Electrical insulating oil 48 ... Oil opening 49 ... Bellows cover 50 ··· Distance sensor (detection component)
51... Strain sensor (detection component)

Claims (8)

A housing to which an elastic member is attached;
Electrical insulating oil enclosed in the housing;
An X-ray apparatus comprising: one detection component that detects a deformation amount of the stretchable member due to heat of the electrical insulating oil;
A storage unit for holding data indicating a relationship between the temperature in the housing and the deformation amount;
A monitoring unit that monitors the temperature inside the housing based on the deformation amount detected by the detection component and the data stored in the storage unit;
Equipped with a,
The stretchable member is attached to extend toward the outside of the housing,
The housing includes a cover that covers the stretchable member,
The X-ray diagnostic imaging apparatus, wherein the detection component is a distance sensor attached to an inner wall of the cover . A housing to which an elastic member is attached;
Electrical insulating oil enclosed in the housing;
An X-ray apparatus comprising: one detection component that detects a deformation amount of the stretchable member due to heat of the electrical insulating oil;
A storage unit for holding data indicating a relationship between the temperature in the housing and the deformation amount;
A monitoring unit that monitors the temperature inside the housing based on the deformation amount detected by the detection component and the data stored in the storage unit;
Equipped with a,
The elastic member is provided to expand and contract inside the housing,
The X-ray diagnostic imaging apparatus according to claim 1, wherein the detection component is a distance sensor attached at a position spaced from the inner surface of the stretchable member . An arithmetic unit that calculates a processable amount based on the temperature inside the casing monitored by the monitoring unit;
A display unit for displaying the processable amount calculated by the calculation unit;
X-ray image diagnostic apparatus according to claim 1 or claim 2, further comprising a. The X-ray image diagnostic apparatus according to claim 3 , wherein the processable amount includes a fluoroscopic time or a number of images that can be captured. A limiting X-ray condition calculating unit that calculates a limited X-ray condition based on the temperature inside the housing monitored by the monitoring unit;
Wherein the display unit, X-rays image diagnostic apparatus according to claim 1 or claim 2, characterized in that displaying the restricted X-ray condition. The detection component, X-rays image diagnostic apparatus according to claim 1 or claim 2 characterized in that it is a strain sensor mounted on the surface of the elastic member. A housing to which an elastic member is attached;
Electrical insulating oil enclosed in the housing;
A detection component attached at one location to detect the amount of deformation of the stretchable member due to the heat of the electrical insulating oil;
Equipped with a,
The stretchable member is attached to extend toward the outside of the housing,
The housing includes a cover that covers the stretchable member,
The X-ray apparatus according to claim 1, wherein the detection component is a distance sensor attached to an inner wall of the cover . A housing to which an elastic member is attached;
Electrical insulating oil enclosed in the housing;
A detection component attached at one location to detect the amount of deformation of the stretchable member due to the heat of the electrical insulating oil;
Equipped with a,
The elastic member is provided to expand and contract inside the housing,
The X-ray apparatus according to claim 1, wherein the detection component is a distance sensor attached at a position spaced from the inner surface of the stretchable member .

Images