CN107890353B - PET (polyethylene terephthalate) rack and PET imaging equipment - Google Patents
PET (polyethylene terephthalate) rack and PET imaging equipment Download PDFInfo
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- CN107890353B CN107890353B CN201711264471.3A CN201711264471A CN107890353B CN 107890353 B CN107890353 B CN 107890353B CN 201711264471 A CN201711264471 A CN 201711264471A CN 107890353 B CN107890353 B CN 107890353B
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- 238000012879 PET imaging Methods 0.000 title claims description 17
- 229920000139 polyethylene terephthalate Polymers 0.000 title description 4
- 239000005020 polyethylene terephthalate Substances 0.000 title description 4
- -1 polyethylene terephthalate Polymers 0.000 title description 3
- 238000009434 installation Methods 0.000 claims abstract description 59
- 230000007246 mechanism Effects 0.000 claims abstract description 46
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 32
- 238000000429 assembly Methods 0.000 claims description 39
- 230000000712 assembly Effects 0.000 claims description 39
- 238000001816 cooling Methods 0.000 claims description 5
- 210000001503 joint Anatomy 0.000 claims description 3
- 238000012636 positron electron tomography Methods 0.000 claims 29
- 238000002600 positron emission tomography Methods 0.000 description 52
- 239000000306 component Substances 0.000 description 12
- 238000012423 maintenance Methods 0.000 description 5
- 238000003384 imaging method Methods 0.000 description 3
- 238000002059 diagnostic imaging Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000003351 stiffener Substances 0.000 description 2
- 239000008358 core component Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 238000009206 nuclear medicine Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000001338 self-assembly Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
- A61B6/02—Arrangements for diagnosis sequentially in different planes; Stereoscopic radiation diagnosis
- A61B6/03—Computed tomography [CT]
- A61B6/037—Emission tomography
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
- A61B6/44—Constructional features of apparatus for radiation diagnosis
- A61B6/4429—Constructional features of apparatus for radiation diagnosis related to the mounting of source units and detector units
- A61B6/4435—Constructional features of apparatus for radiation diagnosis related to the mounting of source units and detector units the source unit and the detector unit being coupled by a rigid structure
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- Radiology & Medical Imaging (AREA)
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- Biophysics (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Optics & Photonics (AREA)
- Pathology (AREA)
- Physics & Mathematics (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- High Energy & Nuclear Physics (AREA)
- Surgery (AREA)
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- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Nuclear Medicine (AREA)
- Measurement Of Radiation (AREA)
Abstract
A PET frame comprises a frame outer frame and an outer frame bracket used for being fixed on the frame outer frame; the frame outer frame comprises a detector supporting frame and an installation backboard, the detector supporting frame comprises a plurality of groups of outer frame components with plate-shaped structures and a reinforcing plate, the plurality of groups of outer frame components are sequentially and fixedly connected end to form a polygonal outer frame, and the reinforcing plate is perpendicular to the polygonal outer frame; the mounting backboard is of an annular structure and comprises a mounting end face for mounting the detector module and a connecting end face, and the connecting end face is flush with the reinforcing plate; the outer frame support comprises a bottom supporting mechanism which is horizontally arranged and two groups of positioning supporting components which are vertically arranged on the bottom supporting mechanism, the detector supporting frame is fixed on the bottom supporting mechanism, the two groups of positioning supporting components are respectively arranged close to two sides of the detector supporting frame and are fixedly connected with the detector supporting frame, and the rapid installation and fixation of the PET detector module and other components can be effectively and conveniently realized.
Description
Technical Field
The invention belongs to the field of medical appliances, and relates to a PET imaging device, in particular to a mounting rack of the PET imaging device.
Background
PET (positron emission tomography) scanning equipment is an internationally sophisticated medical imaging diagnostic equipment, which uses medical imaging technology for imaging human body functions at the molecular level. The PET scanning device is composed of a scanning frame, an inspection bed, a computer system, an operation console, and the like. The module mounting plates are arranged on the scanning frame, and the modules of the detectors are annularly and uniformly arranged and mounted on the module mounting plates to form a detector ring of the PET detector. The main technical indexes of the PET imaging equipment, such as position resolution, sensitivity and the like, depend on the adopted detector system, so the PET detector unit is a core component of the nuclear medicine equipment.
As mentioned above, since the PET apparatus is large in size, and has a width and a height often exceeding two meters, with the existing installation structure and installation method of the detector unit, an operator often needs to select different operation points according to the installation positions of the detector unit to install and route the detector unit, and especially when installing and plugging the top and bottom detector units, the operation is often very inconvenient due to the limitation of the height of the top and the space of the bottom. Because the structure of the detector is complex and the number is numerous, the detector inevitably has problems in the operation process of the PET equipment, and when confirming the specific position of the detector unit to be faulty and maintaining and repairing the faulty detector unit, the fault point is uncertain and can be too narrow although having an operation space, or the fault point can be effectively determined only by detaching the whole shell of the PET equipment, so that the fault diagnosis and the maintenance of the detector unit are inconvenient. Meanwhile, with the existing detector unit mounting structure, if the detector unit needs to be maintained, repaired or upgraded, all original detector units mounted on the module mounting plate are required to be detached entirely, or groups of connected detector units need to be detached and pasted in groups instead of one detector unit, so that great inconvenience is brought to maintenance and repair, and heavy maintenance cost is brought to a user of the equipment. In addition, the dead weight of the PET rack is heavy, and the convenience and the accuracy of the self-assembly of the PET rack also cause non-negligible influence on the imaging quality of the PET imaging equipment.
Therefore, whether the installation, maintenance, replacement and installation of the detector module and other components are convenient or not and whether the installation and the accuracy of the PET rack are convenient or not are determined to be a key point of the hardware structural design of the PET equipment or not.
Disclosure of Invention
The invention discloses a PET (polyethylene terephthalate) rack and PET imaging equipment, which are stable in structure and convenient to install, and when the PET imaging equipment is assembled or maintained, the installation surface of a PET detector module is always an open end surface, so that the rapid installation and fixation of the PET detector module and other components can be effectively and conveniently realized by one person.
To achieve the above object, the solution of the present invention is:
A PET rack, comprising a rack outer frame for fixing a detector module and an outer frame bracket for fixing to the rack outer frame;
The frame outer frame comprises a detector supporting frame and an installation backboard fixed in the detector supporting frame, the detector supporting frame is of a polygonal rigid structure and comprises a plurality of groups of outer frame components of plate-shaped structures and a reinforcing plate, the plurality of groups of outer frame components are sequentially and fixedly connected end to form a polygonal outer frame, and the reinforcing plate is perpendicular to the polygonal outer frame and fixedly connected with the polygonal outer frame; the mounting backboard is of an annular structure and comprises a mounting end face and a connecting end face which faces away from the mounting end face, wherein the mounting end face is used for fixing a plurality of groups of detector modules, and the connecting end face is flush with the reinforcing plate and fixedly connected with the reinforcing plate;
the outer frame support comprises a bottom supporting mechanism which is horizontally arranged and two groups of positioning supporting components which are vertically arranged on the bottom supporting mechanism, the detector supporting frame is fixed on the bottom supporting mechanism, the two groups of positioning supporting components are respectively arranged close to two sides of the detector supporting frame and are fixedly connected with the detector supporting frame so as to be matched with the bottom supporting mechanism to be used for fixing and limiting the frame outer frame.
Preferably, the installation end face is uniformly provided with a plurality of groups of limiting assemblies, limiting grooves formed by adjacent limiting assemblies are matched with the outline of the shell of the detector module, and the central lines of the limiting grooves radially penetrate through the circle center to be arranged for installation and tangential positioning of the detector module.
Further, the limiting component is a limiting edge, the cross section of the limiting edge is of an inverted T-shaped structure, and the width of the limiting edge is gradually limited along the radial direction to the circle center.
Preferably, the mounting backboard is further provided with a positioning point for mounting the detector module, the positioning point is arranged inside the limiting groove, and is located at one end, away from the center of the circle, of the limiting groove so as to be matched with the limiting groove to fix the detector module.
Preferably, the connecting end face is fixedly connected with the reinforcing plate through a plurality of connecting plates.
Further, the connecting plate with link to each other through multiunit adjusting screw and screw up the bolt between the backplate, the connecting plate with the one end that the backplate is connected is equipped with a U type fluting, adjusting screw passes the setting of U type fluting is in order to adjust the vertical state of backplate through adjusting the spacing of U type fluting, screw up the bolt and be used for maintaining fixedly the spacing of U type fluting after the adjustment.
Preferably, a PET cooling pipeline installation space is reserved on the installation backboard.
Preferably, the detector support frame is a regular octagon rigid frame structure.
Preferably, the outer profile of the reinforcing plate is arranged corresponding to the polygonal outer frame so as to be connected with the polygonal outer frame.
Preferably, the inner side surface of the outer frame assembly is further provided with a power module mounting plate and a clock control module mounting groove in advance, so as to provide power and a clock for the PET detector module.
Preferably, the detector support frame further comprises a plurality of frame outer frame rib plates, the frame outer frame rib plates are arranged on the outer side faces of the outer frame assemblies, a group of frame outer frame rib plates are respectively arranged at the connecting positions of the adjacent outer frame assemblies, and the group of frame outer frame rib plates are respectively and fixedly connected with the adjacent two groups of outer frame assemblies.
Preferably, the detector support frame further comprises a plurality of back plate reinforcing ribs, wherein the back plate reinforcing ribs are arranged on the reinforcing plates and located at the joints of the adjacent outer frame assemblies.
Preferably, the bottom support mechanism and the positioning support assembly are rectangular frame structures and comprise a plurality of groups of square tubes which are fixedly connected end to end.
Preferably, the bottom supporting mechanism further comprises two groups of connecting bottom plates, and the square tubes are horizontally arranged on the two groups of connecting bottom plates and fixedly connected with the connecting bottom plates.
Preferably, each group of positioning support assemblies further comprises a group of positioning clamp assemblies, the horizontal center of each positioning clamp assembly is arranged at the same height as the horizontal center of the frame outer frame, and the frame outer frame and the outer frame support are fixedly connected through two groups of positioning clamp assemblies so as to be used for mounting and positioning of the frame outer frame.
Further, the positioning fixture assembly comprises a positioning bracket and a fixture base which is connected with the positioning bracket in a clamping way, the two groups of positioning brackets are respectively positioned on two outer frame assemblies which are vertically arranged on the frame outer frame and comprise a connecting lug plate and a connecting boss, the connecting lug plate is fixedly connected with the outer frame assembly on the same side, the connecting boss is fixed on the connecting lug plate, and the horizontal center of the connecting boss is arranged at the same height as the horizontal center of the frame outer frame so as to be used for determining the installation position of the frame outer frame; the fixture base is arranged at the top of the positioning support assembly and comprises a bracket fixture and a fixture cover plate, and the bracket fixture is in butt joint with the fixture cover plate to form a containing space for connecting the boss.
Preferably, the length of the connecting boss at the accommodating space part is smaller than that of the outer part.
Preferably, the bracket clamp and the clamp cover plate are correspondingly provided with bolt mounting holes for fixing, and the bracket clamp and the clamp cover plate are connected through bolt fastening.
Preferably, the positioning fixture assembly further comprises a horizontal connection bottom plate, wherein the horizontal connection bottom plate is positioned between the fixture base and the horizontally arranged square tube of the bottom supporting mechanism and fixedly connected with the fixture base and the horizontally arranged square tube, and the horizontal positioning connection bottom plate is arranged in an absolute horizontal mode on the surface connected with the fixture base.
Preferably, the support fixture and the horizontal positioning base plate are connected through an adjustable connection to fine tune the level of the positioning fixture assembly.
The clamp base is connected with the horizontal positioning base plate through a plurality of groups of adjusting screws and tightening bolts, the adjusting screws are used for adjusting the distance between the clamp base and the horizontal positioning base plate so as to adjust and determine the absolute level of the clamp base, and the tightening bolts are used for maintaining and fixing the adjusted distance between the clamp base and the horizontal positioning base plate;
preferably, the device further comprises a base mechanism, the base mechanism comprises two groups of adjusting bases, each group of adjusting bases comprises a mounting base plate fixed on the ground and a mounting base plate initially parallel to the mounting base plate, the mounting base plates are connected with the mounting base plate through a plurality of groups of adjusting screws and tightening bolts, the adjusting screws are used for adjusting the distance between the mounting base plates and the mounting base plate so as to determine the height of the adjusting bases, and the tightening bolts are used for maintaining and fixing the distance between the adjusted mounting base plates and the mounting base plate.
Preferably, a thrust ball bearing is further arranged between the adjusting screw and the mounting base plate to assist in adjusting the adjusting screw.
Preferably, the base mechanism further comprises two groups of moving platforms, each group of moving platforms is arranged on a corresponding adjusting base and can move back and forth along the axial direction of the adjusting base, and the bottom supporting mechanism is fixedly connected with the two groups of adjusting bases through the two groups of moving platforms respectively.
Preferably, the moving platform comprises a guide rail parallel to the axial direction, a sliding block positioned on the guide rail and a sliding block adapter plate fixed on the sliding block, the guide rail is arranged on the mounting bottom plate, and the bottom of the bottom bracket is connected with the sliding block through the sliding block adapter plate, so that the PET rack can move along with the movement of the sliding block in the axial direction.
Preferably, the PET frame further comprises two sets of shielding baffles arranged in parallel, the shielding baffles are of an annular structure, one set of shielding baffles is fixedly connected with the inner ring of the mounting backboard, and the other set of shielding baffles is fixedly connected with a plurality of detector modules.
The invention also discloses a PET imaging device which comprises a shell, an examining table, a plurality of groups of detector modules and the PET rack.
The PET rack and the PET imaging equipment are simple and convenient in manufacturing process and installation and fixation, after the whole installation is finished, the installation end face of the detector is an open plane, the detector modules are inserted into the limit grooves of the installation end face along the radial direction and then fixed through bolts, the installation of the detector modules can be realized, after the installation of the detector modules is finished, the installation end face provided with the detector modules is still an open plane, and if the detector modules are required to be replaced, enough space is also available for the disassembly of the detector modules at any positions.
Drawings
FIG. 1 is a schematic view of a PET gantry and detector module mounting structure of the present invention;
FIG. 2 is a schematic view of the structure of the PET machine frame in the embodiment shown in FIG. 1;
FIG. 3 is a front view of the PET gantry of FIG. 2;
FIG. 4 is a rear view of the PET gantry of FIG. 2;
FIG. 5 is an enlarged view of the connection structure of the connection board and the mounting back board shown in FIG. 2;
FIG. 6 is a schematic view of the structure of the mounting back plate in the PET housing shown in FIG. 2;
FIG. 7 is a schematic view of the structure of the detector support frame in the PET gantry of FIG. 2;
FIG. 8 is a schematic view of the structure of the outer frame support in the PET gantry of FIG. 2;
FIG. 9 is a schematic view of the base unit of the PET machine frame of FIG. 2;
Wherein: the base mechanism 100, the adjustment base 110, the installation backing plate 112, the installation bottom plate 113, the adjustment screw 114, the tightening bolt 115, the moving platform 120, the guide rail 121, the slider 122, the slider adapter plate 123, the outer frame bracket 200, the bottom support mechanism 210, the connection bottom plate 211, the positioning support assembly 220, the positioning clamp assembly 230, the connection ear plate 231, the connection boss 232, the support clamp 233, the clamp cover plate 234, the horizontal positioning base plate 235, the square tube 240, the frame outer frame 300, the detector support frame 310, the outer frame assembly 311, the reinforcing plate 312, the outer frame rib 313, the back plate reinforcing rib 314, the installation back plate 320, the installation end face 321, the connection end face 322, the positioning point 323, the limiting assembly 324, the connection plate 325, the U-shaped slot 326, the detector module 400, and the shielding baffle 500.
Detailed Description
The axial and radial isotropic words refer to the mounting backboard, the direction perpendicular to the plane where the mounting backboard is located is axial, the direction where the diameter of the mounting backboard is radial, and the tangential direction of the mounting backboard is tangential.
As shown in fig. 1, the present invention discloses a PET frame for mounting and fixing a detector module 400 and other PET components, which comprises a base mechanism 100, an outer frame bracket 200 mounted on the base mechanism 100, and a frame outer frame 300 fixed on the outer frame bracket 200, which are sequentially arranged from bottom to top.
As shown in fig. 2 and 3, the frame housing 300 includes a detector supporting frame 310 and a mounting back plate 320 fixed inside the detector supporting frame 310, and has the main functions of: the mounting backboard is provided with an independent detector module mounting clamping position, an independent ID board mounting position, an orderly wiring hole position, a power module and a clock exchange module mounting hole position, and the mounting backboard is provided with a connecting and positioning device supporting external clamping and supports hanging of a cooling system.
As shown in fig. 7, in the illustrated embodiment, the detector supporting frame 310 is a regular octagonal rigid frame structure, and includes eight groups of outer frame assemblies 311 with plate-like structures and a reinforcing plate 312, wherein the eight groups of outer frame assemblies 311 are fixedly connected end to end in sequence to form a closed regular octagonal outer frame, two groups of outer frame assemblies 311 located at two sides are vertically arranged to provide a connecting elevation with the outer frame support 200, and one group of outer frame assemblies 311 located at the bottom is horizontally arranged to integrally erect the frame outer frame 300 on the outer frame support 200; as shown in fig. 3, the outline of the outer frame of the stiffener 312 is also regular octagon, which is perpendicular to the polygonal outer frame and fixedly connected to the polygonal outer frame to further improve the stability of the structure of the whole detector supporting frame 310, while the inside of the stiffener 312 is hollow, and the outline of the inner frame is circular to fixedly connect to the mounting backboard 320.
In order to improve the structural strength of the whole frame, the detector support frame is further provided with a plurality of frame outer frame rib plates 313, the frame outer frame rib plates 313 are arranged on the outer side faces of the outer frame assemblies and are positioned at the connecting positions of the adjacent outer frame assemblies, and the two adjacent outer frame assemblies are fixedly connected through the group of outer frame rib plates 313, so that the structural strength of the whole detector support frame 310 is further improved. Meanwhile, the detector supporting frame 310 is further provided with a plurality of back plate reinforcing ribs 314, the back plate reinforcing ribs are arranged on the reinforcing plate 312 and are positioned at the joint of the reinforcing plate and the adjacent outer frame assembly, and the back plate reinforcing ribs are also used for assisting in improving the structural strength of the detector supporting frame.
In addition, in order to facilitate the installation of other components of the PET imaging device, a preset power module installation groove 315 and a clock control module installation groove 316 are further provided on the inner side surface of each outer frame component, so as to provide power and clock for the PET detector module; in this embodiment, the plurality of detector modules are divided into a plurality of groups, and the detector modules in each group share a power module and a clock control module.
The mounting backboard 320 is mainly used for mounting and fixing the detector modules in an annular structure, and comprises a mounting end face 321 for fixing the detector modules and a connecting end face 322 arranged back to back, wherein multiple groups of detector modules are radially distributed on the mounting end face 321, as shown in fig. 4, the connecting end face 322 of the mounting backboard is flush with the reinforcing plate 312, and the mounting backboard and the reinforcing plate 312 are fixedly connected through multiple connecting plates 325 so as to fix the whole mounting backboard 320 in the detector support frame.
In this embodiment, the mounting backboard is spatially adjustable, so that the vertical state of the mounting backboard in the space can be ensured, and the axis direction of the detector ring is kept consistent with that of other imaging devices, specifically, as shown in fig. 5, the connection board 325 is connected with the mounting backboard 320 via a plurality of groups of adjusting screws and tightening bolts, one end of the connection board 325 connected with the mounting backboard 320 is provided with a U-shaped slot 326, the adjusting screws pass through the U-shaped slot 326 to adjust the vertical state of the mounting backboard by adjusting the interval of the U-shaped slot, and the tightening bolts are used for maintaining the interval of the U-shaped slot 326 after the adjustment.
As shown in fig. 6, in this embodiment, a plurality of groups of limiting assemblies 324 are uniformly disposed on the mounting end face 321 for mounting and tangential positioning of the detector module, as a preferred scheme, the limiting assemblies 324 are limiting edges, the cross section of each limiting edge is of an inverted T-shaped structure, the width of each limiting edge is gradually limited along the radial direction of the circle center, the limiting grooves formed by adjacent limiting edges are matched with the outline of the shell of the detector module, each limiting groove is rectangular, and the central lines of the rectangular limiting grooves all radially penetrate through the circle center, so that when the detector module is inserted into the limiting grooves for mounting, the center of the detector module can be ensured to penetrate through the circle center.
In addition, in order to further facilitate the installation of the detector module 400, the installation backboard 320 is further provided with an locating point 323 for installing the detector module, the locating point 323 is arranged inside the limiting groove and is positioned at one end of the limiting groove away from the circle center, and the detector module is provided with a locating installation hole corresponding to the locating point. When carrying out the installation of PET detector module, radially insert the detector module behind the spacing groove, at first with the location mounting hole and the setpoint 323 of detector module aim at and pass through the bolt fastening, carry out spacing and preliminary fixed to detector module 400 in tangential, axial and radial three direction, then carry out the connection between detector module 400 and the installation backplate 320 and fix, set up like this, not only simple to operate, the installation accuracy also can obtain effective assurance.
Meanwhile, the mounting backboard 320 is also reserved with a PET cooling pipeline mounting space.
As shown in fig. 2 and 3, the main functions of the frame support 200 are to provide positioning installation of the frame 300, PET input/output cable installation, PET transfer fixture installation, and cooling system pipeline installation, and in the illustrated embodiment, the frame support 200 includes a bottom support mechanism 210 and two sets of positioning support assemblies 220 fixedly mounted on the bottom support mechanism 210. The bottom support mechanism 210 and the positioning support assembly 220 are rectangular frame structures, which are formed by connecting a plurality of square tubes 240, and a plurality of groups of reinforcing plates are arranged on the bottom support mechanism 210 and the positioning support assembly 220 for increasing the structural strength. In addition, the bottom supporting mechanism 210 further includes two sets of connection bottom plates, the connection bottom plates are respectively disposed above the two sets of adjustment bases, and a rectangular frame structure formed by square tubes is horizontally fixed on the two sets of connection bottom plates.
As shown in fig. 8, the base plate supporting mechanism 210 is horizontally placed and fixed on two groups of sliding blocks 112, the detector supporting frame 310 is erected on the base plate supporting mechanism 210, and two groups of positioning supporting components 220 are vertically placed and respectively positioned at two sides of the detector supporting frame 310, are closely adjacent to the detector supporting frame 310 and are fixedly connected with two groups of vertical outer frame components of the detector supporting frame 310 so as to be matched with the base bracket to realize the fixation and the limit of the frame outer frame. And the outer frame members 311 are disposed perpendicular to the two sets of the detector supporting frames 310.
As shown in fig. 2 to 4, each set of positioning and supporting assemblies 220 further includes a positioning jig assembly 230 for convenience of installation while ensuring installation accuracy, and the two sets of positioning and supporting assemblies 220 are fixedly coupled to the detector supporting frame 310 via the two sets of positioning jig assemblies 230.
The two sets of positioning fixture assemblies 230 are symmetrically arranged about the vertical center line of the detector supporting frame 310, the horizontal center of the positioning fixture assemblies is equal to the horizontal center of the frame outer frame, each set of positioning fixture assemblies is arranged at the joint of the frame outer frame and the frame support, and the frame outer frame and the frame support are fixedly connected through the two sets of positioning fixture assemblies for mounting and positioning of the frame outer frame.
In this embodiment, the positioning fixture assembly 230 includes a positioning bracket and a fixture base connected to the positioning bracket in a clamping manner, where two sets of positioning brackets are respectively located on two outer frame assemblies that are vertically arranged on the frame outer frame, and include a connection lug 231 and a connection boss 232, where the connection lug 231 is fixedly connected to the same side of the vertical outer frame assembly, the connection boss 232 is fixed on the connection lug 231, and the horizontal center of the connection boss 232 is arranged at the same height as the horizontal center of the frame outer frame 300, and the fixture base is arranged on the left and right positioning support assemblies, and includes a bracket fixture 233 and a fixture cover 234, where the bracket fixture 233 is butt-jointed with the fixture cover 234 to form a containing space of the connection boss 232. In the illustrated embodiment, the bracket clamp 233 and the clamp cover 234 are provided with bolt mounting holes corresponding to each other to be fixed, and are connected via bolt fastening.
When the frame outer frame 300 and the outer frame support 200 are installed, after the two groups of connecting bosses 232 are respectively installed to corresponding support clamps, the clamp cover plates are respectively covered, the connecting bosses are fixed between the clamp cover plates and the support clamps through bolts, and the frame outer frame 300 and the outer frame support 200 can be fixed, so that the installation is convenient and quick. In addition, in order to prevent the installation process or after the installation is completed, the connection boss 232 slightly moves in the fixture base, so that the frame axis of the frame outer frame 300 is offset, in this embodiment, the length of the connection boss 232 at the accommodating space portion is smaller than that of the outer portion, so that after the connection boss 232 is installed to the fixture assembly, the outer portion of the connection boss 232 is higher than the inner portion due to the length, in the illustrated embodiment, the inner portion of the connection boss 232 at the fixture assembly is of a cuboid structure, the outer portion of the connection boss at the fixture assembly is of a trapezoid structure, and the trapezoid included angle is 45 degrees, and two 45-degree inclined planes of the trapezoid structure can limit the connection boss 232 to the left and right, so that the condition that the boss 232 slides out of the fixture base is prevented.
In addition, in order to further ensure the level of the whole frame, the positioning fixture assembly further comprises a horizontal connecting bottom plate 235, the horizontal connecting bottom plate is located between the fixture base and the positioning support assembly 220, an upper horizontal square tube of the positioning support assembly is arranged and fixedly connected with the horizontal square tube, the surface, connected with the fixture base, of the horizontal positioning bottom plate 235 is arranged in an absolute horizontal mode, the horizontal connecting bottom plate 235 is connected with the horizontal positioning bottom plate 235 in an adjustable mode to finely adjust and determine the level of the fixture assembly, the fixture base is connected with the horizontal positioning bottom plate 235 through a plurality of groups of adjusting screws and tightening bolts, the adjusting screws are used for adjusting and determining the absolute level of the fixture base, and the tightening bolts are used for maintaining the fixed and adjusted distance between the fixture base and the horizontal positioning bottom plate. Thus, when the PET imaging equipment is installed, the level of the whole PET imaging equipment can be adjusted in an auxiliary mode according to actual needs.
As shown in fig. 9, the PET base mechanism 100 mainly functions to provide positioning and mounting of the PET bottom support mechanism, PET and CT axis alignment adjustment space, PET imaging device transport movement, and adjustment base and PET bottom support mechanism alignment limit during field installation.
In the illustrated embodiment, the PET base unit 100 includes two sets of adjustment bases 110 and a mobile platform 120 disposed on each adjustment base. Each group of adjusting bases 110 comprises a mounting base plate 112 fixed on the ground and a mounting bottom plate 113 arranged initially parallel to the mounting base plate 112, the mounting base plate 112 is fixedly connected with pile foundation bottom holes arranged on the ground through a plurality of groups of expansion bolts, the mounting base plate 113 is arranged in parallel on the mounting base plate 112 after the mounting base plate 112 is fixed, the mounting base plate 112 and the mounting base plate 113 are connected through a plurality of groups of adjusting bolts 114 and tightening bolts 115, the adjustment of the distance between the mounting base plate 112 and the mounting base plate 113 can be realized through fine adjustment of the plurality of adjusting bolts 114, and then the distance between the mounting base plate 112 and the mounting base plate 113 after the adjustment can be maintained through tightening of the plurality of tightening bolts 115. In-situ installation, to ensure absolute level of the PET gantry, the spacing between the mounting plate 112 and the mounting plate 113 may be adjusted, with the adjustment objective being to the absolute level on the support surface provided by the mounting plate.
In this embodiment, the adjusting screws 114 are uniformly distributed on the mounting base plate 113, especially at two ends of the mounting base plate 113, and the plurality of adjusting screws 114 are uniformly and symmetrically distributed, so that the adjustment of the space between the mounting base plate 113 and the mounting base plate 112 is effectively realized, and enough operation space is reserved; the number of the tightening bolts 115 is set corresponding to the number of the adjusting screws 114 and is set near the adjusting screws 114, so that after the state of one adjusting screw 114 is determined, the corresponding tightening bolts 115 can effectively fix the state, and finally, the adjustment and maintenance of the distance between the mounting pad 112 and the mounting base plate 113 are realized. In addition, in the present embodiment, a thrust ball bearing is further provided between each adjusting screw 114 and the mounting pad 112 to assist in adjusting the adjusting screw.
Each group of mobile platforms 120 is arranged on the corresponding adjusting base 110, the bottom supporting mechanism 210 is respectively and fixedly connected with the two groups of adjusting bases 110 through the two groups of mobile platforms 120, each mobile platform 120 comprises a guide rail 121 which is parallel to the axial direction, a sliding block 122 which is arranged on the guide rail and a sliding block adapter plate 123 which is fixed on the sliding block, the guide rail 121 is arranged on the mounting bottom plate 112, and the bottom of the bottom supporting mechanism 210 is connected with the sliding block 122 through the sliding block adapter plate 123, so that when the adjustment space for aligning PET and CT axes and the transportation and the movement of PET imaging equipment are required, the whole PET rack can move along the movement of the sliding block in the axial direction.
The PET rack structure disclosed by the invention is also provided with two groups of shielding baffles 500, the shielding baffles 500 are of annular structures and are arranged at the inner ring of the mounting backboard to cover the crystal arrangement of the detector module, one shielding baffle is fixedly connected with the mounting backboard, the other mounting backboard is fixedly connected with the detector module, and the shielding baffles are made of lead plates, so that captured scattering and random events can be reduced to a certain extent. Because shielding baffle weight is great, for its installation of being convenient for, in this embodiment, shielding baffle comprises polylith arc structure's baffle subassembly end to end in proper order, when installing, with each baffle subassembly fixed in proper order can.
The PET rack disclosed by the invention is simple and convenient in manufacturing process and installation and fixation, the installation end surface of the detector is an open plane after the integral installation is finished, the detector modules are inserted into the limit grooves of the installation end surface along the radial direction and then fixed through bolts, the installation of the detector modules can be realized, the installation end surface provided with the detector modules is still an open plane after the installation of the detector modules is finished, and if the detector modules are required to be replaced, enough space is also available for the disassembly of the detector modules at any positions.
The invention also discloses a PET imaging device which comprises a shell, an examining table, a plurality of groups of detector modules and a PET rack as before. The PET frame is arranged inside the shell and comprises a frame outer frame, a frame outer frame bracket for fixing the frame outer frame and a PET base mechanism, wherein a plurality of groups of detector modules are fixedly arranged on the PET frame and form a scanning channel, and the detection bed can axially move along the scanning channel.
The previous description of the embodiments is provided to facilitate a person of ordinary skill in the art in order to make and use the present invention. It will be apparent to those skilled in the art that various modifications can be readily made to these embodiments and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above-described embodiments, and those skilled in the art, based on the present disclosure, should make improvements and modifications without departing from the scope of the present invention.
Claims (26)
1. A PET gantry, characterized by: comprises a frame outer frame for fixing the detector module and an outer frame bracket for fixing the frame outer frame;
The frame outer frame comprises a detector supporting frame and an installation backboard fixed in the detector supporting frame, the detector supporting frame is of a polygonal rigid structure and comprises a plurality of groups of outer frame components of plate-shaped structures and a reinforcing plate, the plurality of groups of outer frame components are sequentially and fixedly connected end to form a polygonal outer frame, and the reinforcing plate is perpendicular to the polygonal outer frame and fixedly connected with the polygonal outer frame; the mounting backboard is of an annular structure and comprises a mounting end face and a connecting end face which faces away from the mounting end face, wherein the mounting end face is used for fixing a plurality of groups of detector modules, and the connecting end face is flush with the reinforcing plate and is fixedly connected with the reinforcing plate in a spatially adjustable mode;
The outer frame support comprises a bottom supporting mechanism which is horizontally arranged and two groups of positioning supporting components which are vertically arranged on the bottom supporting mechanism, the detector supporting frame is fixed on the bottom supporting mechanism, and the two groups of positioning supporting components are respectively arranged close to two sides of the detector supporting frame and are fixedly connected with the detector supporting frame so as to be matched with the bottom supporting mechanism for fixing and limiting the frame outer frame;
A plurality of groups of limiting assemblies are uniformly arranged on the mounting end face, limiting grooves formed by adjacent limiting assemblies are matched with the outline of the shell of the detector module, and the central lines of the limiting grooves radially penetrate through the circle center to be arranged for mounting and tangential positioning of the detector module;
Each group of positioning support assemblies further comprises a group of positioning clamp assemblies, the horizontal center of each positioning clamp assembly is arranged at the same height as the horizontal center of the frame outer frame, and the frame outer frame and the outer frame support are fixedly connected through two groups of positioning clamp assemblies so as to be used for mounting and positioning of the frame outer frame.
2. The PET gantry of claim 1, wherein: the limiting component is a limiting edge, the cross section of the limiting edge is of an inverted T-shaped structure, and the width of the limiting edge is gradually limited along the radial direction to the circle center.
3. The PET gantry of claim 1, wherein: the installation backboard is further provided with an locating point for installing the detector module, the locating point is arranged inside the limiting groove and is located at one end, away from the circle center, of the limiting groove so as to be matched with the limiting groove to fix the detector module.
4. The PET gantry of claim 1, wherein: and a PET cooling pipeline installation space is reserved on the installation backboard.
5. The PET gantry of claim 1, wherein: the detector supporting frame is of a regular octagon rigid frame structure.
6. The PET gantry of claim 5, wherein: the outer side outline of the reinforcing plate is arranged corresponding to the polygonal outer frame so as to be connected with the polygonal outer frame.
7. The PET gantry of claim 5, wherein: the inner side surface of the outer frame assembly is also provided with a power module mounting plate and a clock control module mounting groove in advance so as to provide power and a clock for the detector module.
8. The PET gantry of claim 5, wherein: the detector supporting frame further comprises a plurality of frame outer frame rib plates, the frame outer frame rib plates are arranged on the outer side faces of the outer frame assemblies, a group of frame outer frame rib plates are respectively arranged at the connecting positions of the adjacent outer frame assemblies, and the frame outer frame rib plates are respectively and fixedly connected with the adjacent two groups of outer frame assemblies.
9. The PET gantry of claim 5, wherein: the detector supporting frame further comprises a plurality of backboard reinforcing ribs, wherein the backboard reinforcing ribs are arranged on the reinforcing plate and located at the connecting positions of the adjacent outer frame components.
10. The PET gantry of claim 1, wherein: the bottom support mechanism with the location supporting component is rectangular frame structure, including multiunit side pipe, side pipe end to end fixed connection.
11. The PET gantry of claim 10, wherein: the bottom supporting mechanism further comprises two groups of connecting bottom plates, and the square tubes are horizontally arranged on the two groups of connecting bottom plates and fixedly connected with the connecting bottom plates.
12. The PET gantry of claim 1, wherein: the positioning fixture assembly comprises a positioning bracket and a fixture base which is connected with the positioning bracket in a clamping way, wherein two groups of positioning brackets are respectively positioned on two outer frame assemblies which are vertically arranged on the frame outer frame and comprise a connecting lug plate and a connecting boss, the connecting lug plate is fixedly connected with the outer frame assemblies on the same side, the connecting boss is fixed on the connecting lug plate, and the horizontal center of the connecting boss is arranged at the same height as the horizontal center of the frame outer frame so as to be used for determining the installation position of the frame outer frame; the fixture base is arranged at the top of the positioning support assembly and comprises a bracket fixture and a fixture cover plate, and the bracket fixture is in butt joint with the fixture cover plate to form a containing space for connecting the boss.
13. The PET gantry of claim 12, wherein: the length of the connecting boss, which is positioned at the accommodating space part, is smaller than the length of the outer part.
14. The PET gantry of claim 13, wherein: the bracket clamp and the clamp cover plate are correspondingly provided with bolt mounting holes for fixing, and the bracket clamp and the clamp cover plate are connected through bolt fastening.
15. The PET gantry of claim 12, wherein: the positioning fixture assembly further comprises a horizontal connecting bottom plate, wherein the horizontal connecting bottom plate is positioned between the fixture base and the square tube horizontally arranged on the bottom supporting mechanism and fixedly connected with the fixture base and the square tube horizontally arranged on the bottom supporting mechanism, and the horizontal positioning connecting bottom plate is arranged on the surface, connected with the fixture base, of the horizontal positioning fixture assembly.
16. The PET gantry of claim 15, wherein: the bracket clamp is connected with the horizontal positioning base plate through an adjustable structure so as to finely adjust the level of the positioning clamp assembly;
The clamp base is connected with the horizontal positioning base plate through a plurality of groups of adjusting screws and tightening bolts, the adjusting screws are used for adjusting the distance between the clamp base and the horizontal positioning base plate so as to adjust and determine the absolute level of the clamp base, and the tightening bolts are used for maintaining and fixing the adjusted distance between the clamp base and the horizontal positioning base plate.
17. The PET gantry of claim 1, wherein: the connecting end face is fixedly connected with the reinforcing plate through a plurality of connecting plates.
18. The PET gantry of claim 17, wherein: the connecting plate with link to each other through multiunit adjusting screw and screw down the bolt between the backplate, the connecting plate with the one end that the backplate is connected is equipped with a U type fluting, adjusting screw adjusts the vertical state of backplate is installed in the adjustment of U type fluting interval, screw down the bolt and pass U type fluting sets up in order to be used for maintaining fixedly the interval of U type fluting after the adjustment.
19. The PET gantry of claim 1, wherein: the device comprises a base mechanism, and is characterized by further comprising two groups of adjusting bases, wherein each group of adjusting bases comprises a mounting base plate fixed on the ground and a mounting base plate initially parallel to the mounting base plate, the mounting base plate is connected with the mounting base plate through a plurality of groups of adjusting screws and tightening bolts, the adjusting screws are used for adjusting the distance between the mounting base plate and the mounting base plate so as to determine the height of the adjusting bases, and the tightening bolts are used for maintaining and fixing the distance between the adjusted mounting base plate and the mounting base plate.
20. The PET gantry of claim 19, wherein: and a thrust ball bearing is further arranged between the adjusting screw and the mounting base plate to assist in adjusting the adjusting screw.
21. The PET gantry of claim 19, wherein: the base mechanism further comprises two groups of moving platforms, each group of moving platforms is arranged on a corresponding adjusting base and can move back and forth along the axial direction of the adjusting base, and the bottom supporting mechanism is fixedly connected with the two groups of adjusting bases through the two groups of moving platforms respectively.
22. The PET gantry of claim 21, wherein: the movable platform comprises a guide rail, a sliding block and a sliding block adapter plate, wherein the guide rail is parallel to the axial direction, the sliding block is arranged on the guide rail, the sliding block adapter plate is fixed on the sliding block, the guide rail is arranged on the mounting bottom plate, and the bottom of the bottom supporting mechanism is connected with the sliding block through the sliding block adapter plate, so that the PET rack can move along with the movement of the sliding block in the axial direction.
23. The PET gantry of claim 20, wherein: the base mechanism further comprises two groups of moving platforms, each group of moving platforms is arranged on a corresponding adjusting base and can move back and forth along the axial direction of the adjusting base, and the bottom supporting mechanism is fixedly connected with the two groups of adjusting bases through the two groups of moving platforms respectively.
24. The PET gantry of claim 23, wherein: the movable platform comprises a guide rail, a sliding block and a sliding block adapter plate, wherein the guide rail is parallel to the axial direction, the sliding block is arranged on the guide rail, the sliding block adapter plate is fixed on the sliding block, the guide rail is arranged on the mounting bottom plate, and the bottom of the bottom supporting mechanism is connected with the sliding block through the sliding block adapter plate, so that the PET rack can move along with the movement of the sliding block in the axial direction.
25. The PET gantry of claim 1, wherein: the detector module is characterized by further comprising two groups of shielding baffles which are arranged in parallel, wherein the shielding baffles are of an annular structure, one group of shielding baffles are fixedly connected with the inner ring of the mounting backboard, and the other group of shielding baffles are fixedly connected with a plurality of detector modules.
26. A PET imaging device comprising a housing, an examination couch, a plurality of groups of detector modules, characterized in that: further comprising the PET gantry of any one of claims 1 to 25.
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| CN201711264471.3A CN107890353B (en) | 2017-12-05 | 2017-12-05 | PET (polyethylene terephthalate) rack and PET imaging equipment |
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| CN201711264471.3A CN107890353B (en) | 2017-12-05 | 2017-12-05 | PET (polyethylene terephthalate) rack and PET imaging equipment |
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| CN108917533B (en) * | 2018-04-27 | 2023-12-08 | 广东鸿图科技股份有限公司 | Three-coordinate clamp rapid positioning measurement device and method |
| CN109050509A (en) * | 2018-08-13 | 2018-12-21 | 长兴微羽智能科技有限公司 | A kind of two-way antitorque braking bracket |
| WO2020077907A1 (en) * | 2018-10-16 | 2020-04-23 | 深圳市艾克瑞电气有限公司 | Ct equipment |
| CN109820532A (en) * | 2019-02-01 | 2019-05-31 | 上海联影医疗科技有限公司 | CT equipment and its rotatable support structure |
| CN110393543B (en) * | 2019-07-19 | 2023-09-26 | 东软医疗系统股份有限公司 | CT frame and CT machine |
| CN112924479A (en) * | 2021-01-28 | 2021-06-08 | 山东科技大学 | On-site assembly type annular scanning industrial CT machine and operation method |
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