JP6058292B2 - X-ray computed tomography apparatus, gantry, carriage for transportation, gantry rotating part with assembly jig, gantry rotating part for x-ray computed tomography apparatus and gantry assembling method - Google Patents

Description

Embodiments described herein relate generally to an X-ray computed tomography apparatus, a gantry, a carriage for transportation, a gantry rotating part with an assembly jig, a gantry rotating part for an X-ray computed tomography apparatus, and a gantry assembling method.

  Work to install an X-ray computed tomography apparatus in a hospital is being carried out. If the hospital delivery route is narrow or if there is a weight limit on the loading elevator, the platform is disassembled into the platform rotation unit and the platform fixing unit and loaded into the installation destination. At the installation destination, the platform rotation unit and the platform assembly unit The frame is assembled from. The gantry rotating part is a heavy object exceeding 500 kg, and has a cylindrical shape. For this reason, the gantry rotating part is lifted and attached to the gantry fixing part by a tower-shaped assembly jig (yagula jig) as shown in FIG. The tower jig is a large-sized device, and assembly work using the tower jig is a large-scale one. Therefore, the work load on the operator is large, and a lot of time is required for the assembly work.

An object of the embodiment is to provide an X-ray computed tomography apparatus, a gantry, a carriage for transportation, a gantry rotating part with an assembly jig, and a gantry rotating part for an X-ray computed tomography apparatus, which can easily assemble the gantry. And providing a method for assembling the gantry.

The X-ray computed tomography apparatus according to the present embodiment is an X-ray computed tomography apparatus including a gantry equipped with an imaging mechanism and a console for controlling the gantry, and the gantry is attached with an X-ray tube. comprising the a rotation unit, and a fixing portion for rotatably supporting the rotating unit around the axis, wherein the rotating portion includes a seat surface portion for being placed on the receiving platform of the dolly on the outer peripheral surface It is characterized by that.

It is a figure which shows the structure of the X-ray computed tomography apparatus which concerns on this embodiment. FIG. 2 is a schematic perspective view of the gantry of FIG. 1. FIG. 3 is a schematic perspective view of a gantry rotating unit in FIG. 2. FIG. 3 is a schematic perspective view of a gantry fixing part in FIG. 2. The longitudinal cross-sectional view of the mount frame of FIG. The perspective view of the trolley | bogie (hand lift) which concerns on this embodiment. The side view of the hand lift of FIG. The top view of the hand lift of FIG. FIG. 4 is a front view of the gantry rotating unit of FIG. 3. The figure which looked at the seat surface part of the gantry rotation part of Drawing 9 from the lower part. The front view of the mount fixing | fixed part of FIG. The figure which shows an example of the base stand which can remove the whole connection frame of FIG. The figure which shows an example of the base stand which can remove a part (detachable part) of the connection frame of FIG. The figure which shows the typical flow of the assembly operation | work of the mount frame concerning this embodiment. The front view of the mount rotation part with an assembly jig manufactured in step S2 of FIG. The side view of the mount rotation part with an assembly jig manufactured in step S2 of FIG. The figure which shows the mount fixing | fixed part installed in step S3 of FIG. The figure which shows the base fixing | fixed part from which the connection frame or the attachment or detachment part was removed in step S4 of FIG. The front view of the base rotation part with an assembly jig with which the nail | claw part was inserted in the notch based on step S5 of FIG. The side view of the base rotation part with an assembly jig with which the nail | claw part was inserted in the notch based on FIG.14 S5. The figure which shows the external appearance of the mount frame based on FIG.14 S8. The front view of the gantry rotation part concerning the modification 1. FIG. The front view of the mount frame rotation part which concerns on the modification 2. FIG. The front view of the mount fixing part which concerns on the modification 3. FIG. The figure which shows the assembly operation of the mount using a tower jig.

  Hereinafter, an X-ray computed tomography apparatus, a gantry, a carriage for transportation, a gantry rotating unit with an assembly jig, and a gantry assembling method according to the present embodiment will be described with reference to the drawings.

  FIG. 1 is a diagram showing a configuration of an X-ray computed tomography apparatus according to the present embodiment. As shown in FIG. 1, the X-ray computed tomography apparatus according to this embodiment includes a gantry 1 and a console 100. The gantry 1 is installed in a CT imaging room such as a hospital. The console 100 is installed in a CT imaging room or a control room adjacent to the CT imaging room. The console 100 controls the gantry 1 in accordance with an instruction from the operator via the input device 200. The gantry 1 performs X-ray CT imaging in accordance with control from the console 100. The gantry 1 is equipped with an X-ray tube and an X-ray detector arranged to face each other with a subject interposed therebetween. The gantry repeats X-ray exposure and X-ray detection at high speed while rotating the X-ray tube and the X-ray detector around the rotation axis, and collects raw data indicating X-ray attenuation. The collected raw data is transmitted from the gantry 1 to the console 100. The console 100 reconstructs a CT image representing the spatial distribution of the X-ray attenuation coefficient in the subject based on the raw data. The console 100 displays the CT image on the display device 300.

  FIG. 2 is a schematic perspective view of the gantry 1. In FIG. 2, the gantry 1 with the cover removed is shown. As shown in FIG. 2, the gantry 1 includes a gantry rotating unit 10 and a gantry fixing unit 40. FIG. 3 is a schematic perspective view of the gantry rotating unit 10, and FIG. 4 is a schematic perspective view of the gantry fixing unit 40.

  As shown in FIGS. 2 and 3, the gantry rotating unit 10 includes a substantially cylindrical rotating frame (R-BASE) 11 having an opening 11 a formed in the center. Holes for attaching various devices such as an X-ray tube 12, a high voltage generator 13, an X-ray detector 14, a data acquisition circuit 15, a data transmission device 16, a cooling device 17, and a heat dissipation device 18 to the rotating frame 11 A recess is formed. The rotating frame 11 is formed of a metal such as aluminum. Various devices such as the X-ray tube 12, the high-voltage generator 13, the X-ray detector 14, the data acquisition circuit 15, the data transmission device 16, the cooling device 17, and the heat radiating device 18 supply power from the gantry fixing unit 40. Receive and operate. The X-ray tube 12 and the X-ray detector 14 are attached to the rotating frame 11 so as to face each other with the opening 11a interposed therebetween. The high voltage generator 13 applies a high voltage to the X-ray tube 12 and supplies a filament current. The X-ray tube 12 generates X-rays in response to application of a high voltage from the high-voltage generator 13 and supply of a filament current. The X-ray detector 14 detects X-rays generated from the X-ray tube 12 and generates an electric signal corresponding to the detected X-ray intensity. The data collection circuit 15 performs A / D conversion on the electrical signal generated by the X-ray detector 14 to convert the electrical signal into raw data. The raw data is transmitted to the console 100 via the data transmission device 16. The cooling device 17 cools the X-ray tube 12. The heat radiating device 18 radiates the heat in the data collection circuit 15 to the outside of the gantry 1.

  As shown in FIG. 4, the gantry fixing unit 40 includes a rotation mechanism 41, a main frame 43, and a base stand 45. The rotating mechanism 41 is fastened to the rotating frame 11. A slip ring mechanism (not shown in FIG. 4) is attached to the rotation mechanism 41. A rotation mechanism 41 is rotatably supported on the main frame 43 around the rotation axis R1. The rotation mechanism 41 rotates with the rotation frame 11 around the rotation axis R1 in response to a drive signal supplied from a drive device (not shown) in the cover. The base stand 45 is installed on the floor surface of the CT imaging room. The base stand 45 supports the main frame 43 away from the floor surface. Further, the base stand 45 supports the main frame 43 so that the rotation axis R1 and the vertical axis R3 orthogonal to the horizontal axis R2 can be inclined with respect to the horizontal axis R2 orthogonal to the rotation axis R1 and parallel to the floor surface. . The main frame 43 tilts (tilts) the vertical axis R3 with respect to the horizontal axis R2 in response to a drive signal supplied from a drive device (not shown) in the cover. The base stand 45 includes, for example, two standing frames 451 and a connection frame 453. The two standing frames 451 are attached to both side surfaces of the main frame 43, and are installed upright on the floor surface. The connection frame 453 connects the two standing frames 451 in order to strengthen the support of the main frame 43 by the two standing frames 451.

  FIG. 5 is a longitudinal sectional view of the gantry 1. For simplicity of explanation, the X-ray tube 12 and the high-voltage generator 13, the X-ray detector 14, the data collection circuit 15, the data transmission device 16, the cooling device 17, and the heat radiating attached to the rotating frame 11 of FIG. Various devices such as the device 18 are omitted. As shown in FIG. 5, the rotation mechanism 41 of the gantry fixing part 10 has a support frame 47 having an opening at the center. The support frame 47 is fastened to the rotary frame 11 with a fastener such as a screw SC so that the center axis of the opening coincides with the rotation axis R1. Typically, a plurality of insertion holes 11h through which the screws SC are inserted are formed around the opening of the rotating frame 11. A plurality of screw holes 47s respectively corresponding to the plurality of insertion holes 11h are formed in the outer wall 47w1 of the support frame 47 in contact with the rotating frame 11. The screw SC is screwed into the screw hole 47s by the operator through the insertion hole 11h. A plurality of annular electrodes (slip rings) 49 are attached to the outer peripheral surface 47 w 2 of the support frame 47. A conductive brush (slider) 51 is attached to the inner peripheral surface 43 w 1 of the main frame 43 so as to make sliding contact with the annular electrode 49. Between the main frame 43 and the support frame 47, a bearing 53 for facilitating the rotation of the support frame 47 is provided.

  As shown in FIGS. 2, 3, 4, and 5, the gantry 1 according to the present embodiment has a structure that can be easily assembled using a transportation carriage. As a structure that can be assembled, the gantry rotating part 10 has a seat surface part 20, and the gantry fixing part 40 has a guide part 50. The seat surface portion 20 and the guide portion 50 will be described later in detail.

  First, a transport cart for assembling the gantry 1 will be described. The transport cart according to the present embodiment functions as a jig for easily assembling the gantry 1. The transportation cart according to the present embodiment can be applied to any type of cart as long as it has a receiving platform on which the gantry rotating unit 10 can be placed. In the following, for the sake of specific description, it is assumed that the transport carriage is a hand lift.

  FIG. 6 is a perspective view of a transport carriage (hand lift) 80 according to the present embodiment. FIG. 7 is a side view of the hand lift 80 of FIG. FIG. 8 is a plan view of the hand lift 80 of FIG. As shown in FIGS. 6, 7, and 8, the handlift 80 is equipped with a chassis 81. A cargo receiving portion 83 is connected to the chassis 81. The load receiving unit 83 includes a load receiving table 85 and a load receiving table supporting unit 87. The gantry rotating unit 10 is placed on the load receiving table 85. The surface with which the gantry rotating part 10 of the load receiving table 85 comes into contact is referred to as a load receiving surface 85w. Typically, as the load receiving platform 85, two claw portions 85-1 and 85-2 that are provided in parallel by being separated by a predetermined distance Wa1 in the left-right direction are used. One end portions of the two claw portions 85-1 and 85-2 are connected to the load receiving table support portion 87. A chassis 81 is provided behind the load receiving support 87. The chassis 81 has a support plate 88. An elevating device 89 is mounted on the support plate 88. The lifting device 89 supports the cargo receiving portion 83 so as to be lifted and lowered. A driving device 91 is connected to the lifting device 89. The drive device 91 generates power for operating the lifting device 89. A handle bar 93 is supported on the upper part of the lifting device 89 so as to be tiltable in the vehicle front-rear direction and the vehicle left-right direction. An operation unit 95 is attached to the tip of the handle bar 93. A lever 951 for lowering the claw portions 85-1 and 85-2 is attached to the operation portion 95.

  For example, an internal combustion engine such as a hydraulic cylinder is used as the lifting device 89, and a reciprocating pump such as a plunger piston is used as the driving device 91, for example. A hydraulic circuit (not shown) communicates between the hydraulic cylinder 89 and the plunger piston 91. When the handle bar 93 is tilted rearward by the operator or the like, the plunger piston 91 is compressed by the handle bar 93, and oil flows from the plunger piston 91 into the hydraulic cylinder 89 via the hydraulic circuit. The hydraulic cylinder 89 raises the shaft 891 using oil inflow pressure. As the shaft 891 is raised, the claw portions 85-1 and 85-2 are raised. When the handle bar 93 is tilted forward by the operator and the lever 951 is operated by the operator, oil flows from the hydraulic cylinder 89 into the plunger piston 91 via the hydraulic circuit. The hydraulic cylinder 89 lowers the shaft 891 using oil outflow pressure.

  A main caster 97 is provided below the chassis 81. The main caster 97 has a right steering wheel 973 and a left steering wheel 975 that are connected to a wheel support shaft 971 so as to be rotatable about the axis. The wheel support shaft 971 is rotatably attached to the lifting / lowering device 89 via a chassis support shaft (not shown; a shaft attached perpendicularly to the wheel support shaft 971). The chassis support shaft rotates in a direction corresponding to the tilt direction of the handle bar 93. The right steering wheel 973 and the left steering wheel 975 are rotatable around the chassis support shaft by the wheel support shaft 971 and the chassis support shaft.

  Auxiliary casters 98 are attached to the lower portions of the substantially tip portions of the claw portions 85-1 and 85-2. Each auxiliary caster 98 is supported by an elevating mechanism 99 so as to be movable up and down. The elevating mechanism 99 approaches or separates each auxiliary caster 99 from the claw portions 85-1, 85-2 in order to keep the cargo receiving surface 85w horizontal in conjunction with the elevation of the claw portions 85-1, 85-2. To do.

  The hand lift 80 places the gantry rotating unit 10 so that the load receiving surfaces 85 w of the claw portions 85-1 and 85-2 are brought into contact with the seating surface 20 w of the seating surface portion 20 of the gantry fixing unit 10. The load receiving surface 85w has a shape corresponding to the seating surface 20w in order to place the gantry rotating unit 10 thereon. For example, the shape of the seating surface 20w is designed according to the shape of the cargo receiving surface 85w. Alternatively, the shape of the load receiving surface 85w is designed according to the shape of the seating surface 20w. Typically, the cargo receiving surface 85w has a flat surface. The seating surface 20w is also formed in a flat surface so as to correspond to the planar load receiving surface 85w. In order to fix the gantry rotating part 10 placed on the claw parts 85-1 and 85-2, a fixing part (hereinafter referred to as a claw part side fixing part) 851 is provided on the claw parts 85-1 and 85-2. Is provided. For example, the claw portion side fixing portion 851 is suitably an insertion hole for inserting the screw SC or a screw hole into which the screw SC is screwed. The number of claw portion fixing portions 851 may be any number as long as it is one or more. However, in order to fix the gantry rotating part 10 more firmly, it is better to be 2 or more.

  In addition, the load receiving surface 85w of each nail | claw part 85-1,85-2 does not necessarily need to be a plane, if the mount frame rotation part 10 can be mounted. For example, when the seat surface 20w is uneven, the load receiving surface 85w may be formed with an unevenness that fits into the unevenness of the seat surface 20w. Further, a slip stopper formed of resin or the like may be attached to the cargo receiving surface 85w.

  Next, the seat surface part 20 of the gantry rotating part 10, the guide part 50 of the gantry fixing part 40, and the claw parts 85-1 and 85-2 of the handlift 80 will be described in detail. FIG. 9 is a front view of the gantry rotating unit 10. FIG. 10 is a view of the seat surface portion 20 of the gantry rotating unit 10 as viewed from below. FIG. 11 is a front view of the gantry fixing part 40.

  As shown in FIGS. 9 and 10, the same number of seating surface portions 20-1 and 20-2 as claw portions 85-1 and 85-2 of the hand lift 80 are provided on the outer peripheral surface of the rotating frame 11 of the gantry rotating portion 10. It has been. The two seating surface portions 20-1 and 20-2 may be designed so that the two seating surfaces 20w are included in the same horizontal plane so that the gantry rotating unit 10 can be stably placed on the load receiving surface 85w. . As shown in FIG. 10, each seat surface portion 20-1 and 20-2 has a fixing portion (hereinafter referred to as a seat surface) at a position corresponding to the claw portion-side fixing portion 851 provided on the claw portions 85-1 and 85-2. 201 (referred to as a side fixing portion). Specifically, the center-to-center distance Pa1 between the claw part side fixing part 201 of the claw part 85-1 and the claw part side fixing part 201 of the claw part 85-2, and the seating surface side fixing part 201 of the seating surface part 20-1. The center-to-center distance Pb1 between the seat surface portion 20-2 and the seat surface side fixing portion 201 is designed to be substantially the same distance, and the centers of the claw portion side fixing portions 851 of the claw portions 85-1 and 85-2. The distance Pa2 and the center-to-center distance Pb2 of the seating surface side fixing portions 201 of the seating surface portions 20-1 and 20-2 are designed to be substantially the same distance. As the seat surface side fixing part 201 and the claw part side fixing part 851, for example, an insertion hole for inserting a screw or a screw hole into which a screw is screwed is suitable. When the claw portion side fixing portion 851 is an insertion hole so that the seat surface portion 20 and the claw portion 85 can be fastened, a screw hole is formed as the seating surface side fixing portion 201. On the contrary, when the claw portion side fixing portion 851 is a screw hole, an insertion hole is formed as the seating surface side fixing portion 201.

  The seat surface portion 20 is typically made of the same type of metal as the rotating frame 11 such as aluminum. For example, the seat surface portion 20 may be integrally formed with the rotary frame 22 or may be formed separately. When formed separately, the seat surface portion 20 may be detachably attached to the outer peripheral surface of the rotating frame 11 or may be detachably attached. Since the seat surface portion 20 is used in assembling the gantry 1, when the detachable frame 11 is removable from the rotating frame 11, it is preferable to remove the seat surface portion 20 when the assembling work of the gantry 1 is completed.

  The seating surface 20w does not necessarily have to be a flat surface as long as it can be placed on the claw portions 85-1 and 85-2. For example, when the load receiving surface 85w of each claw part 85-1, 85-2 has an unevenness, the seating surface 20w of the seat surface part 20-1, 20-2 has an unevenness that fits the unevenness of the load receiving surface 85w. Also good. Further, a slip stopper made of resin or the like may be attached to the cargo receiving surface 85w.

  As described above, the seat frame 20 is provided in the rotary frame 11 according to the present embodiment. The gantry rotating unit 10 rotates at a high speed of about 0.35 seconds per round during CT imaging. It should be avoided that the center of gravity of the gantry rotating unit 10 is deviated from the rotation axis R1 during rotation by adding the seating surface portion 20 to the rotating frame 11. For this reason, it is necessary to calculate the balance of the gantry rotating unit 10 so that the center of gravity of the gantry rotating unit 10 is stably positioned on the rotation axis R1 during rotation, and the gantry rotating unit 10 needs to be designed according to the calculation result. For example, the weight and position of a weight attached to the rotating frame 11 are calculated so that the center of gravity is located on the rotation axis R1, and the weight is attached to the rotating frame 11 according to this calculation. Therefore, also in this embodiment, the blur of the center of gravity during rotation of the gantry rotating unit 10 can be minimized.

  As shown in FIGS. 2, 4, 5, and 11, a guide portion 50 is provided at the lower portion of the main frame 43. The guide part 50 is a structure for guiding the claw parts 85-1 and 85-2 so that the gantry rotating part 10 can be easily aligned with the gantry fixing part 40. A notch 51 for guiding the claw portions 85-1 and 85-2 is formed in the lower portion of the guide portion 50. When fastening the gantry rotating part 10 and the gantry fixing part 40, the claw parts 85-1 and 85-2 are inserted into the notches 51. In order to further improve the alignment accuracy of the gantry fixing part 40 with respect to the gantry rotating part 10, the dimensions of the notch 51 may be designed according to the dimensions of the claw parts 85-1 and 85-2. Specifically, the difference height Lc1 between the upper surface 51w of the notch 51 and the rotation axis R1 is designed to be substantially the same as the difference height Lb1 between the seating surface 20w of the seat surface portion 20 and the rotation axis R1. Is done. The interval Wc1 between the inner edges of the notch 51 is designed to be substantially the same as the interval Wa1 between the inner edge of the claw portion 85-1 and the inner edge of the claw portion 85-2. The distance Wc2 is designed to be substantially the same as the distance Wa2 between the outer edge of the claw portion 85-1 and the outer edge of the claw portion 85-2, and the width Wc3 of the notch is claw portions 85-1, 85. -2 is designed to be substantially the same as the width Wa3. The position of the upper surface 51w of the notch 51 is the same height as the seat surface 20w of the seat surface portion 20 in a state where the insertion hole 11h of the gantry rotating portion 10 and the screw hole 47s of the gantry fixing portion 40 are aligned. Designed to. The thickness Tc of the notch 51 is such that the claw portions 85-1 and 85-2 are not detached from the notch 51 even when a force in the R2 direction is applied to the claw portions 85-1 and 85-2. Good to be designed. Thus, the dimension of the notch 51 is designed according to the dimensions of the claw portions 85-1, 85-2, the insertion holes 11h, and the screw holes 47s, so that the seat surface portion 20 is provided on the claw portions 85-1, 85-2. When the claw portions 85-1 and 85-2 are inserted into the notch 51 in a state in which is fixed, the insertion hole 11 h of the gantry rotating portion 10 and the screw hole 47 s of the gantry fixing portion 40 are aligned with high accuracy. Is done.

  The guide part 50 may be integrally molded using the same type of metal as the main frame 43, such as aluminum, or may be formed separately. When formed separately, the guide part 50 may be detachably attached to the main frame 43 or may be detachably attached. Since the guide unit 50 is used in assembling the gantry 1, if it can be detached from the main frame 43, it may be removed when the assembling work of the gantry 1 is completed.

  As shown in FIGS. 2, 4, and 11, the connection frame 453 of the base stand 45 lies in the lower part of the gantry fixing portion 40. When the claw portions 85-1, 85-2 of the hand lift 80 are inserted into the cutout 51, the claw portions 85-1, 85-2, the auxiliary casters 98, etc. are blocked by the connection frame 453, and the claw portion 85-1. , 85-2 may not be inserted into the notch 51. Therefore, the base stand 45 according to the present embodiment can attach and detach the entire connection frame 453 as shown in FIG. 12 or a part (hereinafter referred to as an attaching / detaching portion) 453p of the connection frame 453 as shown in FIG. It has a structure. By removing the entire connection frame 453 or the detachable portion 453p from the standing frame 451, the claw portions 85-1, 85-2, the auxiliary casters 98, etc. are inserted into the cutout 51 without being obstructed by the connection frame 453. can do. In the case of FIG. 12, in order to make the connection frame 453 detachable from the standing frame 451, the contact surface of the connection frame 453 with respect to the standing frame 451 and the contact surface of the standing frame 451 with respect to the connection frame 453 are fitted to each other. What is necessary is just to provide unevenness. In the case of FIG. 13, in order to make the detachable portion 453p detachable from the connection frame 453, unevenness fitting with each other is provided on the contact surface of the detachable portion 453p with the connection frame 453 and the contact surface of the connection frame 453 with the detachable portion 453p. It only has to be done. In addition, the structure which can be attached or detached is not limited only to the unevenness | corrugation which mutually fits, The structure using fasteners, such as a screw, may be sufficient.

  Next, assembly work of the gantry 1 according to the present embodiment will be described. FIG. 14 is a diagram illustrating a typical flow of the assembling work of the gantry according to the present embodiment.

  As shown in FIG. 14, first, the gantry rotating part 10 having the seat surface part 20 and the gantry fixing part 40 having the guide part 50 are manufactured (step S1). The gantry rotating unit 10 and the gantry fixing unit 40 are manufactured in, for example, a manufacturing factory of an X-ray computed tomography apparatus.

  When step S1 is performed, the gantry rotating part 40 with the jig is manufactured by fixing the gantry rotating part 40 to the hand lift (transport cart) 80 (step S2). The gantry rotating unit 10 is fixed to the hand lift 80, for example, at a manufacturing factory of an X-ray computed tomography apparatus. For example, the gantry rotating part 10 is suspended using a crane provided in a manufacturing factory, and the seating surface side fixing part 201 of the seating surface part 20 and the claw part side fixing part 851 of the claw parts 85-1 and 85-2 are arranged. The seating surface part 20 of the gantry rotating part 10 is placed on the claw parts 85-1 and 85-2 of the hand lift 80 so as to be aligned. And the seat surface part 20 and the nail | claw parts 85-1 and 85-2 are fastened with a fastener etc. by the operator. Thereby, the gantry rotating part with the assembly jig is completed.

  FIG. 15 is a front view of the gantry rotating unit 500 with the assembly jig. FIG. 16 is a side view of the gantry rotating unit 500 with the assembly jig. As shown in FIG.15 and FIG.16, in the assembly jig | tool mounting rotation part 500, the seating surface 20w of the seating surface parts 20-1 and 20-2 is on the load receiving surface 85w of the nail | claw parts 85-1 and 85-2 of the hand lifter 80. The gantry rotating part 10 is placed on the claw parts 85-1 and 85-2 so as to come into contact with each other. The insertion holes (claw portion side fixing portion 851) of the claw portions 85-1, 85-2 and the screw holes (seat surface side fixing portion 201) of the seat surface portions 20-1, 20-2 are aligned so as to communicate with each other. ing. The seat surface portions 20-1 and 20-2 and the claw portions 85-1 and 85-2 are fastened by a fastener such as a screw SC. For example, the operator inserts the screw SC into the insertion hole 851 from the back surface of the seat surface portions 20-1 and 20-2 and screwes it into the screw hole 201. Thereby, the hand lift 80 and the gantry rotating part 10 are fastened, and the gantry rotating part 500 with the assembly jig is completed.

  The gantry rotating unit 500 with the assembly jig and the gantry fixing unit 40 are individually packed and shipped to an installation location such as a hospital. The assembly jig-equipped gantry rotating unit 500 and the gantry fixing unit 40 are transported to a hospital or the like by a truck, for example.

  The hand lift 80 may be manufactured in the same manufacturing factory as the gantry rotating unit 10 and the gantry fixing unit 40, or may be manufactured in a different manufacturing factory. Further, the gantry rotating part 500 with the assembly jig may be assembled in the same manufacturing factory as the gantry rotating part 10 and the gantry fixing part 40, or may be assembled in the installation place. When assembling at the installation location, first, the gantry rotating unit 10 and the gantry fixing unit 40 are individually packed in a manufacturing factory and shipped to the installation site by a truck. At the installation location, the gantry rotating unit 10 is placed on the handlift 80 using a crane mounted on the truck, and the gantry rotating unit 10 and the handlift 80 are fastened by the operator. Thereby, the gantry rotating unit 500 with the assembly jig is manufactured. The hand lift 80 may be transported from the manufacturing factory to the installation location together with the gantry rotating unit 10 and the gantry fixing unit 40, or may be separately prepared in advance at the installation location.

  When the gantry rotating unit 500 with the assembly jig and the gantry fixing unit 40 are carried into the hospital, the gantry 1 is assembled at the installation location in the hospital. First, the gantry fixing unit 40 is first carried into the installation place, and the gantry fixing unit 40 is installed on the floor as shown in FIG. 17 (step S3).

  When the gantry fixing portion 40 is installed, the connection frame 453 of the base stand 43 or the connection frame 453 is provided as shown in FIG. 18 so that the claw portions 85-1 and 85-2 can be inserted into the notch 51. The detachable portion 453p is removed (step S4). The gantry fixing part 40 may be carried into the installation place with the connection frame 453 or the detachable part 453p removed. In this case, step S4 may not be performed.

  When ready to receive the gantry rotating part 500 with the assembly jig, the operator inserts the claw parts 85-1 and 85-2 into the notch 51 in order to position the gantry rotating part 10 with respect to the gantry fixing part 40. (Step S5). FIG. 19 is a front view of the assembling jig-equipped gantry rotating unit 500 in which the claw portions 85-1 and 85-2 are inserted into the notch 51. FIG. 20 is a front view of the claw portions 85-1 and 85-in the notch 51. It is a side view of the base rotation part 500 with an assembly jig in which 2 was inserted. As shown in FIGS. 19 and 20, the operator pushes the gantry rotating part 500 with the assembly jig toward the gantry fixing part 40 and inserts the claw parts 85-1 and 85-2 into the notch 51. As described above, the notch 51 is positioned so that the insertion hole 11h of the gantry rotating portion 10 and the screw hole 47s of the gantry fixing portion 40 are aligned when the claw portions 85-1 and 85-2 are inserted. Dimensions are designed. Therefore, when the claw portions 85-1 and 85-2 are inserted into the notch 51, the insertion hole 11h and the screw hole 47s are aligned. When the heights of the claw portions 85-1 and 85-2 and the notch 51 are different, the height of the claw portions 85-1 and 85-2 may be adjusted by operating the hand lift 80.

  In addition, when the positioning of the gantry rotating unit 10 with respect to the gantry fixing unit 40 can be performed without the guide unit 50, the guide unit 50 is not necessarily provided in the gantry fixing unit 40.

  When the claw portions 85-1 and 85-2 are inserted into the notches 51, the operator fastens the gantry rotating unit 10 to the gantry fixing unit 40 (step S6). Specifically, a screw is inserted from the insertion hole 11h and screwed into the screw hole 47s. Thereby, the gantry rotating part 10 and the gantry fixing part 40 are fastened.

  When the gantry rotating unit 10 and the gantry fixing unit 40 are fastened, the operator removes the hand lift 80 from the gantry rotating unit 10 (step S7). Specifically, the operator first removes fasteners such as screws from the claw portions 85-1 and 85-2 and the seat surface portions 20-1 and 20-2, and then removes the hand lift 80 from the gantry rotating unit 10. Pull out. After the hand lift 80 is pulled out, the connection frame 453 or the detachable portion 453 p that has been removed is attached to the base stand 45.

  Then, as shown in FIG. 21, the worker covers the gantry rotating unit 10 and the gantry fixing unit 40 with the cover 1c (step S8). Thereby, the assembly of the gantry 1 is completed.

  This is the end of the description of the assembly work of the gantry 1.

  As described above, the X-ray computed tomography apparatus according to the present embodiment includes the gantry 1 equipped with the imaging mechanism and the console 100 that controls the gantry 1. The gantry 1 includes an annular gantry rotating unit 10 to which an X-ray tube 12 and an X-ray detector 14 are attached, and a gantry fixing unit 40 that supports the gantry rotating unit 10 so as to be rotatable around an axis R1. Yes. The gantry rotating portion 10 has a seat surface portion 20 on the outer peripheral surface to be placed on the load receiving base 85 of the transport carriage (hand lift) 80.

  Further, according to the above description, the transport carriage 80 according to the present embodiment includes the chassis 81, the casters 97, and the cargo receiving portion 83. The caster 97 is attached to the chassis 81. The cargo receiving portion 83 is attached to the chassis 81 and has a fixing portion 851 for fixing the gantry rotating portion 10 for the X-ray computed tomography apparatus to the cargo receiving portion 83.

  With the above-described configuration, the gantry rotating unit 10 according to the present embodiment can be stably placed on the transport carriage 80, and the gantry rotating unit 10 can be easily attached to the gantry fixing unit 40 using the transport cart 80. Can do. Compared to the conventional base assembly work using the tower jig, the base assembly work using the transport carriage 80 according to the present embodiment is not large and the base 1 can be easily assembled.

  Thus, according to this embodiment, the X-ray computed tomography apparatus, the gantry 1, the carriage 80, the gantry rotating part 500 with the assembly jig, and the gantry assembling method that enable the assembling work of the gantry 1 to be easily performed. It is to provide.

  Next, various modifications according to the present embodiment will be described.

[Modification 1]
In the above embodiment, the number of the seating surface portions 20 is the same as that of the claw portions 80. However, this embodiment is not limited to this. As long as the gantry rotating unit 10 can be placed on the hand lift 80, the number of the seat surface portions 20 may not be the same as the number of the claw portions 80.

  FIG. 22 is a front view of the gantry rotating unit 10 ′ according to the first modification. As shown in FIG. 22, a single seat surface portion 21 is provided on the outer peripheral surface of the rotating frame 11 of the gantry rotating portion 10 ′ according to the first modification. The seat surface 21w of the seat surface portion 21 is formed in a flat surface so as to correspond to the shape of the load receiving surface 85w of the claw portions 85-1, 85-2. The width Wb4 of the seat surface portion 21 is substantially equal to the interval Wa2 between the outer edges of the two claw portions 85-1 and 85-2 so that the seat surface portion 21 can be easily placed on the claw portions 85-1 and 85-2. Are preferably the same or longer than Wa2. Similarly to the seat surface portion 20 of the present embodiment, the seat surface side fixing portion 201 is provided at a position corresponding to the claw portion side fixing portion 851 of the claw portions 85-1 and 85-2 on the seat surface 21 w of the seat surface portion 21. It has been. Further, the difference height Lb2 between the rotation axis R1 and the seating surface 21w is designed to coincide with the difference height Lc1 between the rotation axis R1 and the upper surface 51w of the notch 51.

  As described above, the gantry rotating unit 10 ′ according to the first modification includes the single seating surface portion 21 that can be placed on the hand lift 80. Therefore, the gantry rotating part 10 ′ can be stably placed on the transport carriage 80, and the gantry rotating part 10 ′ can be easily attached to the gantry fixing part 40 using the transport carriage 80.

[Modification 2]
In the above embodiment, the seat surface portion 20 is a metal body made of a metal such as aluminum added to the outer peripheral surface of the rotating frame 11. However, this embodiment is not limited to this. As long as the gantry rotating part 10 can be placed on the hand lift 80, the seating surface part 20 may not be added to the rotating frame 11.

  FIG. 23 is a front view of the gantry rotating unit 10 ″ according to the second modification. As shown in FIG. 23, a notch 22 having a seating surface 22 w is formed on the outer peripheral surface of the rotating frame 11 of the gantry rotating unit 10 ″ according to the second modification. This notch 22 functions as a seat surface portion. The seat surface 22w is formed in a flat surface so as to correspond to the shape of the load receiving surface 85w of the claw portions 85-1, 85-2. The two seating surfaces 22w are formed to be included in the same horizontal plane so that they can be placed on the claw portions 85-1 and 85-2. Similar to the seat surface portion 20 of the present embodiment, the seat surface side fixing portion 201 is provided at a position corresponding to the claw portion side fixing portion 851 of the claw portions 85-1 and 85-2 on the seat surface 22 w of the seat surface portion 22. It has been. Further, the differential height Lb3 between the rotation axis R1 and the seating surface 22w is designed to coincide with the differential height Lc1 between the rotation axis R1 and the upper surface 51w of the notch 51 of the gantry fixing part 40.

  As described above, the gantry rotating unit 10 ″ according to the second modification includes the single seating surface portion 21 that can be placed on the handlift 80. Accordingly, the gantry rotating part 10 ″ can be stably placed on the transporting carriage 80, and the gantry rotating part 10 ″ can be easily attached to the gantry fixing part 40 using the transporting carriage 80.

[Modification 3]
In the above embodiment, the gantry fixing part 40 is provided with the notch 51 into which the claw parts 85-1 and 85-2 can be inserted. However, this embodiment is not limited to this. If the nail | claw parts 85-1 and 85-2 can be inserted, not a notch but an opening may be provided.

  FIG. 24 is a front view of a gantry fixing unit 40 ′ according to the third modification. As shown in FIG. 24, the guide part 52 of the gantry fixing part 40 ′ according to the modification 3 has an opening 53 for guiding the claw parts 85-1 and 85-2. The opening 53 has a size that allows the claw portions 85-1 and 85-2 to be inserted. In order to improve the alignment accuracy of the gantry fixing part 40 ′ with respect to the gantry rotating part 10, the size of the opening 53 is designed according to the dimensions of the claw parts 85-1 and 85-2 as with the notch 51 of the present embodiment. It is good to be done. Specifically, the interval Wc4 between the inner edges of the opening 53 is designed to be substantially the same as the interval Wa1 between the inner edge of the claw portion 85-1 and the inner edge of the claw portion 85-2. The interval Wc5 between the outer edges of the claw portion 85-1 is designed to be substantially the same as the interval Wa2 between the outer edge of the claw portion 85-1 and the outer edge of the claw portion 85-2, and the width Wc6 of the opening is the claw portion 85-1. , 85-2 is designed to be substantially the same as the width Wa3. The position of the upper surface 53w of the opening 53 is designed to be the same height as the seating surface 20w of the seating surface portion 20 in a state where the insertion hole 11h and the screw hole 47s are aligned. The opening thickness Tc is designed to be substantially the same as the claw thickness Ta.

  As described above, the size of the opening 53 is designed in accordance with the dimensions of the claw portions 85-1, 85-2, the insertion hole 11h, and the screw hole 47s, so that the seat surface portion 20 is provided in the claw portions 85-1, 85-2. When the claw portions 85-1 and 85-2 are inserted into the opening 53 in the fixed state, the insertion hole 11h and the screw hole 47s are aligned with high accuracy.

[Modification 4]
In the above embodiment, it is assumed that the load receiving base 85 of the transport carriage (hand lift) 80 is the two claw portions 85-1 and 85-2. However, this embodiment is not limited to this. The load receiving platform 85 may have three or more claw portions 85 or a single claw portion 85 as long as the seat surface portion 20 of the gantry rotating unit 10 can be placed thereon. In this case, the arrangement of the notches 51 may be designed according to the arrangement of the claw portions 85 so that the claw portions 85 can be inserted into the notches 51. Thereby, the alignment accuracy of the gantry rotating unit 10 with respect to the gantry fixing unit 40 using the transportation carriage 80 according to the modification 4 can be maintained at the same accuracy as the alignment accuracy of the present embodiment.

[Modification 5]
In the above-described embodiment, the description has been made focusing on the assembly of the gantry 1. However, this embodiment is not limited to this. In the present embodiment, the dismantling work of the gantry 1 can be easily performed.

  The dismantling of the gantry 1 can be executed by tracing the assembly work flow of FIG. This is performed when the gantry 1 is removed or when the bearing 53 is replaced. First, the connection frame 453 or the detachable part 453p is removed from the gantry fixing part 40. Then, the hand lift 80 is pushed toward the gantry 1, the claw portions 85-1 and 85-2 are inserted into the notches 51, and the seat surface portions 20-1 and 20-2 and the claw portions 85-1 and 85-2 are inserted. Conclude. Next, in order to separate the gantry rotating part 10 and the gantry fixing part 40, a fastener such as a screw is taken out from the insertion hole 11h and the screw hole 47s. Then, by pulling out the hand lift 80 to which the gantry rotating unit 10 is fastened (that is, the gantry rotating unit 500 with the assembly jig) from the gantry fixing unit 40, the gantry rotating unit 10 is pulled away from the gantry fixing unit 40. In this state, the bearing 53 and the like are exchanged. When removing the gantry 1, the gantry rotating unit 500 with the assembly jig and the gantry fixing unit 40 are packed and carried out of the hospital.

  Thus, since the seat surface part 20 which can be mounted in the handlift 80 is provided in the stand fixing | fixed part 10, the stand 1 can be easily disassembled using the handlift 80, without using a tower jig. . Accordingly, the bearing 53 can be easily replaced.

  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 novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

  DESCRIPTION OF SYMBOLS 1 ... Mount, 10 ... Mount rotating part, 11 ... Rotating frame, 20 ... Seat surface part, 40 ... Mount fixing part, 41 ... Rotating mechanism, 43 ... Main frame, 45 ... Base stand, 47 ..., 50 ... Guide part, 80 DESCRIPTION OF REFERENCE SYMBOLS: Transportation cart (hand lift), 81 ... chassis, 83 ... cargo receiving part, 85 ... claw part, 100 ... console, 200 ... input device, 201 ... seat surface side fixing part, 300 ... display device, 851 ... claw part side Fixed part

Claims (19)

An X-ray computed tomography apparatus comprising a gantry equipped with an imaging mechanism and a console for controlling the gantry,
The mount is
A rotation unit for X-ray tube is attached,
A fixing portion that supports the rotating portion so as to be rotatable about an axis, and
The rotating part has a seat surface part on the outer peripheral surface to be placed on the load receiving table of the transportation carriage,
An X-ray computed tomography apparatus characterized by that. Surface in contact with the receiving platform of the seat surface portion has a plane, X-rays computed tomography apparatus according to claim 1.   The X-ray computed tomography apparatus according to claim 1, wherein the seating surface portion has an insertion hole or a screw hole for a fixture for fixing the rotating portion and the load receiving table. The X-ray computed tomography apparatus according to claim 1, wherein the fixing portion has an insertion portion for inserting the cargo receiving table. The rotating part has a plurality of insertion holes for inserting screws for attachment to the fixed part,
The fixing portion has a plurality of screw holes that are screwed into screws for mounting the rotating portion,
The seat surface portion is formed in the rotating portion so that the plurality of insertion holes and the plurality of screw holes are aligned with each other in a state where the load receiving table is inserted into the insertion portion, and the insertion portion is the fixing portion. Formed into,
The X-ray computed tomography apparatus according to claim 4 . The rotating part has a rotating frame to which the X-ray tube can be attached,
The seat surface portion is formed integrally with the rotating frame,
The X-ray computed tomography apparatus according to claim 1. The rotary part has a possible rotation frame mounting the X-ray tube,
The seat surface portion is a structure that is detachably attached to an outer peripheral surface of the rotating frame.
The X-ray computed tomography apparatus according to claim 1. The fixing part is
An annular rotating body attached to the rotating unit and rotating together with the rotating unit;
An annular electrode formed on the surface of the rotating body;
A conductive brush that is in sliding contact with the annular electrode;
An annular main frame to which the brush is attached and rotatably supports the rotating body;
A base stand that supports the main frame away from the floor, and
The main frame has an insertion part for inserting the consignment table,
The X-ray computed tomography apparatus according to claim 1.   The X-ray computed tomography apparatus according to claim 8, wherein the insertion portion is an opening or a notch that is formed at a lower portion of the main frame and engages with the load receiving table. The base stand is
Two standing frames attached to both sides of the main frame and installed on the floor;
A connection frame connecting the two standing frames,
The connection frame is removably attached to the two standing frames or has a removable portion so that the transport carriage can enter between the two standing frames.
The X-ray computed tomography apparatus according to claim 8. The seat surface portion has the same number of seat surface portions as the plurality of claw portions constituting the load receiving table ,
The intervals between the plurality of seating surface portions are substantially equal to the intervals between the plurality of claw portions,
The X-ray computed tomography apparatus according to claim 1. A rotation unit for X-ray tube is attached,
A fixed portion that rotatably supports the rotating portion around an axis;
A stand for an X-ray computed tomography apparatus comprising:
The rotating part has a seat surface part to be placed on the receiving platform of the transportation carriage.
A stand characterized by that. A transport cart having a receiving platform;
The outer peripheral portion has a seat surface portion to be placed on the load receiving table , and a rotating portion to which an X-ray tube is attached .
The rotating portion has the seat surface portion fixed to a loading cradle,
A gantry rotating part with an assembly jig characterized by that . A rotating part to which an X-ray tube is attached;
The rotating part has a seat surface part on the outer peripheral surface to be placed on the load receiving table of the transportation carriage,
  A gantry rotating part for an X-ray computed tomography apparatus. A receiving platform on which a gantry rotating unit for an X-ray computed tomography apparatus is mounted;
A fixing portion for fixing the gantry rotating portion provided on the load receiving table and placed on the load receiving table ;
The fixing portion is a screw hole that is screwed into a screw for fixing the seat receiving portion and the seat surface portion provided in the gantry rotating portion so that the gantry rotating portion is placed on the load receiving portion , or It is an insertion hole for inserting a screw.
Transportation cart characterized by that. A support body that holds the load receiving table horizontally and supports it so that it can be raised and lowered ;
The carriage according to claim 15, further comprising a wheel attached to the support. The load receiving platform has a plurality of claw portions equal in number to the seat surface portion,
The interval between the plurality of claw portions is substantially equal to the interval between the seat surface portions,
The transportation cart according to claim 15 . Producing a gantry rotating unit for an X-ray computed tomography apparatus having a seat surface corresponding to a load receiving table provided on a transporting carriage;
A gantry rotating part with an assembly jig is manufactured by fixing the carriage and the gantry rotating part in a state where the load receiving table and the seating surface part face each other,
A gantry fixing part having an insertion part into which the cargo receiving table can be inserted is installed at an installation place,
In order to align the gantry rotating part with respect to the gantry fixing part, the load receiving base of the gantry rotating part with the assembly jig is inserted into the insertion part,
In the state where the load receiving base of the gantry rotating part with the assembly jig is inserted into the insertion part, the gantry rotating part is attached to the gantry fixing part,
Removing the transport carriage from the gantry rotating part attached to the gantry fixing part;
A gantry assembling method comprising the above. A gantry rotating part with an assembly jig having a trolley having a cradle and a gantry rotating part for an X-ray computed tomography apparatus placed on the cradle, and a gantry having an insertion part into which the cradle can be inserted A frame assembly method using a fixed part,
Install the gantry fixing part at the installation location,
In order to align the gantry rotating part with respect to the gantry fixing part, the load receiving base of the gantry rotating part with the assembly jig is inserted into the insertion part,
In the state where the load receiving base of the gantry rotating part with the assembly jig is inserted into the insertion part, the gantry rotating part is attached to the gantry fixing part,
Removing the transport carriage from the gantry rotating part attached to the gantry fixing part;
A gantry assembling method comprising the above.

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