JP6139157B2 - Medical diagnostic imaging equipment - Google Patents

Description

  Embodiments described herein relate generally to a medical image diagnostic apparatus.

  Medical image diagnostic apparatuses are widely used in today's medical field in order to perform various image diagnoses. For example, as a medical image diagnostic apparatus, a gamma camera, a gamma camera type single photon emission computed tomography (SPECT) apparatus, a positron emission CT apparatus (PET apparatus, PET: Positron Emission computed Tomography), etc. A nuclear medicine imaging apparatus is known. As medical image diagnostic apparatuses, an X-ray diagnostic apparatus, an X-ray CT apparatus, an MRI (Magnetic Resonance Spectroscopic Imaging) apparatus, and the like are known.

  In such a medical image diagnostic apparatus, a structure that supports a heavy object such as a detector or a human body is driven using a drive mechanism using a lead screw, a ball screw, or the like. For example, the bed apparatus of the SPECT apparatus moves the top plate on which the subject is mounted to the inside (imaging space) of the gantry apparatus on which the detector unit is mounted, using a drive mechanism mounted on the apparatus itself. . The bed apparatus moves the top board in the vertical direction and the longitudinal direction of the top board. In addition, for example, the base device of the SPECT apparatus moves the detector unit to a position suitable for imaging of the subject by using a drive mechanism mounted on the apparatus itself. The gantry device translates the detector unit along the radial direction of the imaging space, or rotates the detector unit along the circumferential direction of the imaging space.

  The top plate on which the subject is placed becomes a heavy object of around 100 kg, although it depends on the weight of the subject. In addition, a detector unit including a collimator, a gamma ray detector, and the like is a heavy object of several hundred kg. The SPECT device gantry device moves a detector unit of several hundred kg in the vicinity of the human body before or during imaging.

  Conventionally, in a medical diagnostic imaging apparatus, in order to ensure safety at the time of imaging, when a structure that supports a heavy object performs an unintended movement, a power source that supplies power to a motor or the like that drives the structure is provided. The power supply of all the drive mechanisms which a medical image diagnostic apparatus has cut off was interrupted | blocked. However, in the above method, a structure that performs an unintended operation cannot be stopped by a failure other than the drive mechanism.

  For example, in the above method, a structure that performs an unintended operation may be stopped due to a failure such as wear of a screw, malfunction of a brake provided in the drive mechanism, or loosening or disengagement of a drive mechanism component. Can not. In such a case, for example, there is a possibility that the subject falls from the bed apparatus or a heavy object falls to the immediate vicinity of the subject.

Japanese Patent Application Laid-Open No. 11-212833

  The problem to be solved by the present invention is to provide a medical image diagnostic apparatus capable of reliably ensuring the safety of a subject at the time of imaging.

The medical image diagnostic apparatus according to the embodiment includes a structure, a drive mechanism, a tank, a nozzle, and a control unit. The structure supports a heavy object used for taking a medical image. The drive mechanism moves the structure. The tank is filled with a material that is instantaneously cured by air . Nozzle, the is installed in the tank, is installed to be ejecting the material toward the fitting portion between the drive mechanism and the structure. The control unit opens the nozzle when detecting the movement of the structure that does not match the driving amount of the driving mechanism.

FIG. 1 is a diagram for explaining an overall configuration example of a SPECT apparatus according to the present embodiment. FIG. 2 is a diagram for explaining an example of a conventional stop system. FIG. 3 is a diagram (1) for explaining an example of the stop system according to the present embodiment. FIG. 4 is a diagram (2) for explaining an example of the stop system according to the present embodiment. FIG. 5 is a diagram for explaining a modification of the stop system according to the present embodiment. FIG. 6 is a diagram illustrating an example when the stop system according to the present embodiment is applied to a drive mechanism different from the drive mechanism illustrated in FIG. 3. FIG. 7 is a diagram illustrating an example when the stop system according to the present embodiment is applied to a drive mechanism different from the drive mechanism illustrated in FIG. 3.

  Hereinafter, embodiments of a medical image diagnostic apparatus will be described in detail with reference to the accompanying drawings. In the following embodiments, a SPECT apparatus that performs gamma camera type single photon emission tomography (SPECT) will be described as an example of a medical image diagnostic apparatus.

(Embodiment)
First, an example of the overall configuration of the SPECT apparatus according to this embodiment will be described. FIG. 1 is a diagram for explaining an overall configuration example of a SPECT apparatus according to the present embodiment. As shown in FIG. 1, the SPECT apparatus according to the present embodiment includes a gantry device 10, a bed device 20, and a console device 30.

  The gantry device 10 is an apparatus that detects and images radiation (gamma rays) emitted from a radiopharmaceutical administered to a subject and selectively taken into a living tissue of the subject. The gantry device 10 illustrated in FIG. 1 includes two detector units (a detector unit 11 and a detector unit 12). That is, the SPECT apparatus illustrated in FIG. 1 is a SPECT apparatus equipped with two detectors. In addition, this embodiment is applicable also to the SPECT apparatus which mounts 1 detector, and the SPECT apparatus which mounts 3 detectors.

  The detector unit 11 and the detector unit 12 are detectors that detect gamma rays emitted from a radiopharmaceutical (tracer) nuclide (RI: Radio Isotope) that is selectively taken into a living tissue of a subject. A space surrounded by the detector unit 11 and the detector unit 12 is an imaging space into which the subject is inserted.

  Specifically, each of the detector unit 11 and the detector unit 12 two-dimensionally detects the incidence of gamma rays emitted from the subject. Then, each of the detector unit 11 and the detector unit 12 generates the detected gamma ray position and energy information as, for example, the amplified and A / D converted position and energy information, and the generated position and energy information. It transmits to the console apparatus 30 mentioned later.

  For example, each of the detector unit 11 and the detector unit 12 contains a radiation detector having a scintillator and a photomultiplier tube (PMT). The scintillator converts gamma rays into light. The PMT multiplies the light emitted from the scintillator and converts it into an electrical signal.

  Each of the detector unit 11 and the detector unit 12 is provided with a collimator that limits the incident direction. Each of the detector unit 11 and the detector unit 12 detects gamma rays incident in an incident direction limited by, for example, a lead collimator. The detector unit 11 and the detector unit 12 are, for example, 200 kg heavy objects. The detector unit 11 and the detector unit 12 are heavy objects used for taking a medical image (SPECT image).

  The gantry device 10 has a camera drive mechanism (not shown). This camera drive mechanism is a device that moves each of the detector unit 11 and the detector unit 12. For example, the camera drive mechanism rotates and moves each detector unit to a predetermined position along the circumferential direction of the imaging space. For example, the camera drive mechanism translates each detector unit to a predetermined position along the radial direction of the imaging space. Further, for example, the camera driving mechanism moves the detector unit 11 and the detector unit 12 and arranges them at a predetermined angle (for example, 180 degrees) to maintain the interval between the detector units. Thus, the two detector units are rotated and moved along the circumferential direction of the imaging space.

  When imaging is performed by rotating the detector unit 11 and the detector unit 12, the imaging space is a space within the circumference in which the detector unit 11 and the detector unit 12 are rotationally moved. As shown in FIG. 1, the detector unit 11 and the detector unit 12 are translated along the radial direction of the imaging space or rotated and moved along the circumferential direction of the imaging space by the camera driving mechanism of the gantry device 10. Or

  Each of the detector unit 11 and the detector unit 12 rotates around the subject to generate data in a plurality of directions. The time required for each rotation of the detector unit 11 and the detector unit 12 is usually several minutes. The camera drive mechanism moves the detector unit 11 and the detector unit 12 by moving the structure that supports the detector unit 11 and the detector unit 12. A configuration example of the camera driving mechanism will be described in detail later.

  The couch device 20 is a device having a top 21 that is inserted into the imaging space together with a subject that is the subject of the SPECT image. The couch device 20 includes a couchtop support portion 22 that supports the couchtop 21 so as to be movable into the imaging space, and a couch drive mechanism 23 that supports the couchtop support portion 22 so as to be movable in the vertical direction. The movement of the top plate 21 in the longitudinal direction may be performed by the top plate support portion 22 or by the bed driving mechanism 23. Although depending on the weight of the subject, the subject, the top plate 21 and the top plate support portion 22 are, for example, heavy objects of around 100 kg. The subject, the top board 21 and the top board support part 22 are heavy objects used for taking a medical image (SPECT image). The couch drive mechanism 23 moves the “subject, the couchtop 21 and the couchtop support portion 22” in the vertical direction by moving the structure that supports the couchtop 21 and the couchtop support portion 22.

  The console device 30 is a device that accepts an operation of the SPECT device by the operator, accumulates and images the position and energy information collected by the gantry device 10, and then reconstructs a SPECT image of the subject.

  Specifically, the console device 30 controls the gantry device 10 and the couch device 20 to take a SPECT image. More specifically, the console device 30 performs projection processing such as offset correction and sensitivity correction on the collected image obtained by the gantry device 10 to generate projection data. Then, the console device 30 reconstructs a SPECT image by a predetermined reconstruction process using the projection data. As the predetermined reconstruction process, for example, a reconstruction process by a successive approximation method may be mentioned.

  The operation of the SPECT apparatus at the time of capturing a SPECT image will be briefly described. First, before photographing, the top support 22 of the bed apparatus 20 is stopped at an initial position lower than the photographing space outside the gantry apparatus 10. When imaging is started, first, a subject to which a tracer has been administered is placed on the top 21, and then the top support 22 is an abbreviation of the imaging space of the gantry device 10 based on instructions from the operator. It is moved upward to the same height as the center, and then the top plate 21 is moved into the imaging space together with the subject.

  When the top 21 is moved into the shooting space, shooting is performed. Specifically, the gantry device 10 detects gamma rays emitted from the subject while each detector unit rotates, and transmits the information to the console device 30. Thereby, the console apparatus 30 reconfigure | reconstructs a SPECT image and produces | generates the various images used for a clinical test.

  When imaging is finished, the top 21 is moved out of the imaging space together with the subject, and then the top support 22 is moved downward to the initial position.

  The overall configuration of the SPECT apparatus according to the present embodiment has been described above. With this configuration, in the SPECT apparatus according to the present embodiment, the heavy object is moved in the gantry apparatus 10 and the couch apparatus 20. Here, conventionally, in a medical image diagnostic apparatus such as a SPECT apparatus, in order to ensure safety at the time of photographing, when a structure supporting a heavy object performs an unintended movement, the movement of the heavy object is stopped. A stop system was installed. Hereinafter, a conventional stop system will be described with reference to FIG. 2 using the detector unit 11 as an example of a heavy object. FIG. 2 is a diagram for explaining an example of a conventional stop system.

  In the conventional example shown in FIG. 2, the structure 100 that supports the detector unit 11 is a “nut” having an opening formed with a female screw at the center. In the conventional example shown in FIG. 2, the screw 203 is a male screw that fits into the structure 100 that is a nut. In the conventional example shown in FIG. 2, the structure 100 moves in the vertical direction by rotating the screw 203 arranged vertically in the horizontal direction. And the detector unit 11 moves up and down by the movement of the structure 100. The screw 203 rotates with the following configuration.

  In the conventional example shown in FIG. 2, the motor 200 is disposed so that the rotation axis is in the vertical direction. By driving the motor 200, the rotation shaft rotates in the horizontal direction. In the conventional example shown in FIG. 2, the rotating shaft of the motor 200 is also the rotating shaft of the first gear 201, and the first gear 201 rotates in the horizontal direction when the motor 200 is driven. In the conventional example shown in FIG. 2, the second gear 202 arranged so that the first gear 201 and the gear mesh with each other rotates in the horizontal direction by the rotation of the first gear 201. Then, the screw 203 connected to the rotation shaft of the second gear 202 is rotated by the rotation of the second gear 202, and the rotation of the screw 203 is converted into a parallel movement in the vertical direction of the structure 100 by the screw nut mechanism. Is done. Depending on the rotation direction of the motor 200, the moving direction of the structure 100 is determined. Further, the moving speed in the vertical direction of the structure 100 is determined according to the rotation speed of the motor 200.

  The “motor 200, first gear 201, second gear 202, screw 203” serves as a drive mechanism (camera drive mechanism) for moving the detector unit 11. The detector unit 12 is also moved by the same drive mechanism as described above. Further, for example, the bed driving mechanism 23 is configured by a driving mechanism similar to the above.

  Here, as shown in FIG. 2, an encoder 401 is connected to the rotating shaft of the motor 200. The encoder 401 detects the drive amount of the motor 200 (the number of rotations per unit time). In the conventional example shown in FIG. 2, a potentiometer 402 is arranged in the structure 100. The potentiometer 402 detects the position of the structure 100. There is a uniquely determined correlation between the driving amount of the motor 200 and the position of the structure 100. Therefore, the control unit 400 ′ shown in FIG. 2 receives the detection result of the encoder 401 and the detection result of the potentiometer 402, and whether or not the structure 100 is moving in accordance with the drive amount by the drive mechanism (motor 200). Determine whether.

  Here, in the conventional stop system, the control unit 400 ′ performs the following control when detecting the movement of the structure 100 that does not match the driving amount of the motor 200. For example, the control unit 400 ′ shuts off a power supply that supplies power to the motor 200. Alternatively, the control unit 400 ′ shuts off the power in all the drive mechanisms included in the gantry device 10 and the couch device 20. Alternatively, as illustrated in FIG. 2, the control unit 400 ′ operates a brake 403 attached to the rotation shaft of the motor 200 to stop the rotation of the rotation shaft of the motor 200.

  However, in the conventional stop system described above, the factors that cause the structure 100 to perform an unintended operation are, for example, wear of the screw 203, wear of the structure 100 that is a nut, malfunction of the brake 403, and other driving. When the parts constituting the mechanism are loose or detached, the movement of the structure 100 cannot be stopped. For example, in the case where a gap due to wear occurs in the fitting portion between the screw 203 and the structure 100, the lowering of the structure 100 cannot be stopped even if the power of the motor 200 is shut off or the brake 403 is operated. . In such a case, for example, the subject may fall from the couch device 20, or the detector unit 11 that is a heavy object may fall to the immediate vicinity of the subject.

  Therefore, in the present embodiment, a stop system described below is mounted on the SPECT apparatus. In the stop system according to the present embodiment, a tank in which a substance that increases friction is enclosed is installed. And a nozzle is installed in this tank. This nozzle is installed so that a substance can be ejected toward the site where the driving force of the driving mechanism is transmitted to the structure. This part is a fitting part of a screw nut mechanism, for example. And in the stop system concerning this embodiment, when the motion of the structure which does not correspond to the amount of drive by a drive mechanism is detected, a nozzle is opened.

  Hereinafter, a case where the stop system according to the present embodiment is applied to a camera drive mechanism similar to that in FIG. 2 will be described with reference to FIGS. 3 and 4. 3 and 4 are diagrams for explaining an example of the stop system according to the present embodiment.

  A structure 100 that supports the detector unit 11 illustrated in FIG. 3 is the same nut as the structure 100 illustrated in FIG. 2. Further, “motor 200, first gear 201, second gear 202, screw 203” illustrated in FIG. 3 is a drive mechanism (camera drive mechanism) for moving detector unit 11 as in FIG. Since these operations and the like are the same as those described above, description thereof will be omitted.

  Also, the encoder 401 is connected to the rotation shaft of the motor 200 illustrated in FIG. 3 as in FIG. The encoder 401 detects the driving amount (rotation amount per unit time) of the motor 200. Further, a potentiometer 402 is arranged in the structure 100 illustrated in FIG. 3 as in FIG.

  Also in this embodiment, the control unit 400 illustrated in FIG. 3 receives the detection result of the encoder 401 and the detection result of the potentiometer 402, and the structure 100 matches the driving amount by the driving mechanism (motor 200). It is determined whether or not a movement is being performed.

  However, in this embodiment, a tank 300 is installed as shown in FIG. A substance 301 that increases friction is enclosed in the tank 300. The substance 301 is, for example, a resin that is instantaneously cured by air. Alternatively, the substance 301 is, for example, an adhesive that is instantaneously cured by air. For example, the substance 301 is sealed in the tank 300 at a high pressure.

  As shown in FIG. 3, a nozzle 302 is installed in the tank 300. As shown in FIG. 3, the nozzle 302 is installed so that the substance 301 can be ejected toward a portion where the driving force of the motor 200 is transmitted to the structure 100, that is, a fitting portion between the structure 100 that is a nut and the screw 203. Is done. The tank 300 is attached to the structure 100 so that the relative positional relationship with the fitting site is maintained.

  Then, when detecting the movement of the structure 100 that does not match the driving amount by the motor 200, the control unit 400 opens the nozzle 302 as shown in FIG. Thereby, as shown in FIG. 4, the substance 301 is ejected to a fitting portion between the structure 100 and the screw 203. The substance 301 ejected to the mating site is cured in a few seconds in the mating site and the gap between the structure 100 and the screw 203, and the structure 100 is fixed to the screw 203. As a result, the structure 100 that has been rapidly lowered stops.

  In the present embodiment, any substance can be used as the substance 301 as long as the substance can increase the friction and stop the rapid movement of the structure 100. Specifically, the substance 301 may be a resin mixed with particles. The particles are, for example, metal powder. The metal powder enters the gap between the structure 100 and the screw 203 together with the resin, forcibly generates biting, and can fix the structure 100 to the screw 203.

  In the present embodiment, any sensor can be adopted as the sensor installed in the motor 200 and the structure 100 as long as the movement of the structure 100 that does not match the driving amount of the motor 200 can be detected. .

  3 and 4 are similarly applied to the camera driving mechanism of the detector unit 12 that is a heavy object. The contents described with reference to FIGS. 3 and 4 are similarly applied to the bed driving mechanism 23 that moves the heavy object “the subject, the top board 21 and the top board support part 22”.

  3 and 4 exemplify a case where the tank 300 is disposed on the upper portion of the structure 100 and the substance 301 is ejected at a high pressure toward a fitting portion located below the nozzle 302. For example, when the arrangement surface of the scintillator of the detector unit 11 (detector unit 12) is positioned on the lower side, the arrangement shown in FIGS. 3 and 4 is an arrangement that can reliably stop the structure 100. Become.

  However, the detector unit 11 (detector unit 12) can rotate. For this reason, when the arrangement surface of the scintillator of the detector unit 11 (detector unit 12) is located on the upper side, the substance 301 is ejected at a high pressure toward the fitting portion located on the nozzle 302. . Even in such a case, since the substance 301 is jetted at a high pressure, it can reach the fitting site or the gap located above the nozzle and be cured. In addition, when the scintillator array surface of the detector unit 11 (detector unit 12) is positioned beside the subject, the substance 301 is jetted at a high pressure, so that a fitting site or gap positioned beside the nozzle. And can be cured. However, the pressure in the tank 300 may decrease with time. In such a case, the substance 301 does not reach the fitting site or the gap.

  In order to reliably stop the structure 100 without depending on the position of the detector unit 11 (detector unit 12), it is desirable to configure a stop system as follows. FIG. 5 is a diagram for explaining a modification of the stop system according to the present embodiment.

  In the modification shown in FIG. 5, as in FIG. 3, the detector unit 11 is supported by the structure 100, and the structure 100 moves by fitting with the screw 203. In the modification shown in FIG. 5, the first tank 300 a in which the substance 301 is enclosed and the second tank 300 b in which the substance 301 is enclosed are arranged on the upper side and the lower side of the structure body 100, respectively. The first tank 300a has a first nozzle 302a. In the case shown in FIG. 5, the first nozzle 302a is installed in the first tank 300a so that the substance 301 can be ejected toward the upper fitting portion. . Further, the second tank 300b has a second nozzle 302b, and in the case shown in FIG. 5, the second nozzle 302b is disposed in the second tank 300b so that the substance 301 can be ejected toward the lower fitting portion. Installed.

  In the modification shown in FIG. 5, when the structure 100 moves suddenly, the control unit 400 opens the first nozzle 302 a and the second nozzle 302 b and causes the substance 301 to be injected at high pressure from two directions. As a result, the structure 100 can be reliably stopped regardless of the direction in which the detector unit 11 is arranged.

  As illustrated in FIG. 5, when installing a plurality of tanks, the control unit 400 can acquire the position of the detector unit 11 (detector unit 12) and inject the substance 301 at a high pressure downward. Only the nozzle of the tank may be opened.

  In the above description, the case where the detector unit 11 is supported by one structure 100 and the structure 100 is moved by one screw 203 has been described. However, the drive mechanism of the detector units (11, 12) and the top plate 21 is not limited to this, and other drive mechanisms may be mounted. The stop system according to the present embodiment can be designed in various forms depending on the type of drive mechanism. This will be described with reference to FIGS. 6 and 7 are diagrams illustrating an example in which the stop system according to the present embodiment is applied to a drive mechanism different from the drive mechanism illustrated in FIG. 3.

  In FIG. 6, the first structure 100a and the second structure 100b that support the detector unit 11 are attached to both side surfaces of the detector unit 11, and the first structure 100a is engaged with the first screw 203a, The case where the two structural bodies 100b are engaged with the second screw 203b is illustrated. Each of the first structure 100a and the second structure 100b moves up and down at the same speed and direction as the first screw 203a and the second screw 203b rotate. As a result, the detector unit 11 Move up and down. The driving mechanism illustrated in FIG. 6 can also be applied to the bed driving mechanism 23.

  In the drive mechanism illustrated in FIG. 6, at all four locations of the upper and lower sides of the first structure 100a and the upper and lower sides of the second structure 100b, or at least one location selected from the four locations, A tank in which the above substances are enclosed is installed. By adopting such a configuration, the stop system according to the present embodiment can also be applied to the drive mechanism illustrated in FIG.

  The drive mechanism illustrated in FIG. 7 is typically a drive mechanism that is employed as the bed drive mechanism 23. In the drive mechanism illustrated in FIG. 7, two bars (bar 500 and bar 501) are connected in a state of intersecting in an X shape. One end A of the bar 500 is fixed to the rear of the top plate support 22 that supports the top plate 21, and the other end B of the bar 500 is fixed to the front floor. Also, one end C of the bar 501 is fixed in front of the top support 22 and the other end D of the bar 501 is slidably disposed along the rear floor. In the drive mechanism shown in FIG. 7, when the end D slides left and right on the floor surface, the bar 500 and the bar 501 connected at the intersection E move in the vertical direction, and as a result, the top plate 21 moves in the vertical direction. Moving.

  In the drive mechanism illustrated in FIG. 7, it is preferable to install a tank in which the above-described substance is sealed in the intersection E or the range where the end D slides. By adopting such a configuration, the stop system according to the present embodiment can also be applied to the drive mechanism illustrated in FIG. That is, the stop system according to the present embodiment can change the position at which the substance that increases the friction is ejected according to the type of the drive mechanism. In the present embodiment, the control unit 400 may change the type and amount of the substance ejected for fixation according to the weight of the heavy object, the position of the heavy object, the moving direction of the heavy object, and the like. .

  As described above, in the present embodiment, when an abnormal operation of the structure supporting the heavy object used for image capturing is detected, an instantaneous adhesive or the like is applied to a portion where the driving force of the driving mechanism is transmitted to the structure. A heavy object is instantaneously stopped by ejecting a substance that increases friction. That is, in this embodiment, even when the structure performs an unintended operation due to a factor that cannot be dealt with by the conventional stop system, the friction is increased in the portion directly responsible for the movement of the structure by the drive mechanism. The movement of the structure can be stopped by ejecting the substance. As a result, in the present embodiment, for example, a detector (detector unit 11, 12) that detects data to be used for generating a SPECT image or a subject that is a subject for capturing a SPECT image falls from the bed apparatus 20. It is possible to reliably avoid a descent to the immediate vicinity of the subject. Therefore, in the present embodiment, it is possible to ensure the safety of the subject at the time of imaging.

  In the above description, the stop system according to the present embodiment is applied to the SPECT apparatus. However, the stop system according to the present embodiment includes a “driving mechanism that drives a structure that supports a detector that detects data used for generating a medical image” and a “subject to be imaged for a medical image”. The present invention is applicable to all medical image diagnostic apparatuses having at least one of a “driving mechanism for driving a structure that supports the top plate”.

  Examples of such a medical image diagnostic apparatus include a gamma camera, a PET apparatus, an X-ray CT apparatus, an MRI apparatus, and an X-ray diagnostic apparatus in addition to the SPECT apparatus.

  Further, in the description of the above-described embodiment, each component of each illustrated device is functionally conceptual and does not necessarily need to be physically configured as illustrated. In other words, the specific form of distribution / integration of each device is not limited to the one shown in the figure, and all or a part of the distribution / integration is functionally or physically distributed in arbitrary units according to various loads or usage conditions. Can be integrated and configured. Furthermore, all or a part of each processing function performed in each device can be realized by a CPU and a program that is analyzed and executed by the CPU, or can be realized as hardware by wired logic.

  As described above, according to the present embodiment, the safety of the subject at the time of imaging can be reliably ensured.

  Although several embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. These embodiments and their modifications are included in the scope and gist of the invention, and are also included in the invention described in the claims and the equivalents thereof.

DESCRIPTION OF SYMBOLS 11, 12 Detector unit 100 Structure 200 Motor 201 1st gear 202 2nd gear 203 Screw 300 Tank 301 Material 302 Nozzle 400 Control part

Claims (5)

A structure that supports a heavy object used for taking a medical image;
A drive mechanism for moving the structure;
A tank in which a substance that is instantly cured by air is enclosed;
Is installed in the tank, a nozzle is installed to be ejecting the material toward the fitting portion between the drive mechanism and the structure,
A controller that opens the nozzle when detecting the movement of the structure that does not match the amount of drive by the drive mechanism;
A medical image diagnostic apparatus comprising: The substance, tree butter or medical image diagnostic apparatus according to claim 1, characterized in that a contact adhesive. A structure that supports a heavy object used for taking a medical image;
A drive mechanism for moving the structure;
A tank in which a substance containing resin mixed with metal powder is enclosed;
A nozzle installed in the tank so as to be able to eject the substance toward a fitting portion between the drive mechanism and the structure;
A controller that opens the nozzle when detecting the movement of the structure that does not match the amount of drive by the drive mechanism;
A medical image diagnostic apparatus comprising:   The medical image diagnostic apparatus according to claim 1, wherein the heavy object is a detector that detects data used to generate a medical image.   The medical image diagnostic apparatus according to any one of claims 1 to 3, wherein the heavy object is a top plate on which a subject that is an imaging target of a medical image is placed.

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