CN104825181B - The sweep mechanism and PET device of a kind of PET device - Google Patents
The sweep mechanism and PET device of a kind of PET device Download PDFInfo
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- CN104825181B CN104825181B CN201510227580.2A CN201510227580A CN104825181B CN 104825181 B CN104825181 B CN 104825181B CN 201510227580 A CN201510227580 A CN 201510227580A CN 104825181 B CN104825181 B CN 104825181B
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- 230000007246 mechanism Effects 0.000 title claims abstract description 163
- 239000013078 crystal Substances 0.000 claims description 34
- 239000000725 suspension Substances 0.000 claims description 11
- 238000001514 detection method Methods 0.000 claims description 8
- 230000004308 accommodation Effects 0.000 claims description 7
- 230000003247 decreasing effect Effects 0.000 claims description 5
- 125000004122 cyclic group Chemical group 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 238000005096 rolling process Methods 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical group [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 2
- 229910052782 aluminium Inorganic materials 0.000 claims description 2
- 230000037237 body shape Effects 0.000 claims 1
- 239000011469 building brick Substances 0.000 claims 1
- 238000009434 installation Methods 0.000 abstract description 26
- 238000012423 maintenance Methods 0.000 description 18
- 239000000306 component Substances 0.000 description 10
- 238000003745 diagnosis Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000008439 repair process Effects 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 238000002059 diagnostic imaging Methods 0.000 description 2
- 238000010030 laminating Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000002600 positron emission tomography Methods 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 238000012879 PET imaging Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
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- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
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- 230000005484 gravity Effects 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000009206 nuclear medicine Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000010408 sweeping Methods 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
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Abstract
A kind of sweep mechanism of PET device, including rotary scanning frame and multigroup detector cells, scanning gantry includes supporting mechanism, position-limit mechanism, caged framework mechanism positioned there between and an at least driving link, caged framework mechanism includes the two groups of module mounting plates and multigroup hanger that are oppositely arranged, one module mounting plate is fastenedly connected with supporting mechanism, and another module mounting plate is fastenedly connected with position-limit mechanism；Hanger is set up on two groups of outer edges of module mounting plate and respectively with two groups of module mounting plates and is fastenedly connected；Driving link is arranged between same paranotum support and module mounting plate, including connecting plate and supporting plate, supporting plate is parallel axially arranged Circular Plate, a circle ring column on module mounting plate is corresponding with supporting plate to be arranged connection, rotated so as to caged framework mechanism rubs along the anchor ring of supporting plate, detector cells are live demountable structure, by the cooperation of detector cells and scanning gantry, can conveniently realize the installation and dismounting of detector cells.
Description
Technical field
The invention belongs to medical instruments field, it is related to a kind of sweep mechanism of PET device, further relating to one kind has above-mentioned sweeping
Retouch the PET device of structure.
Background technology
PET (positron emission tomography, positron emission tomography) scanning device is in the world
The medical imaging diagnosis equipment at tip, employs the Medical Imaging Technology for carrying out bodily fuctions' imaging on a molecular scale.PET sweeps
Equipment is retouched to be made up of scanning gantry, examination couch, computer system, operating console etc..Wherein scanning gantry is provided with module peace
Dress plate, the module of detector is annular in shape evenly distributed on the module mounting plate, to form the detection of pet detector
Device ring.The key technical indexes such as position resolution, the sensitivity of PET scan equipment both depend on the detector system that it is used
System, therefore pet detector unit is the core component of nuclear medicine facility.
As previously described, because PET device volume is larger, width and height often beyond two meters, using existing detector
The mounting structure and mounting means of unit, operating personnel are generally required according to the different behaviour of the installation position selection of detector cells
Make installation and the cabling of click-through row detector unit, especially installed and cabling grafting in the detector cells for carrying out top and bottom
When, it is often very inconvenient in operation due to the limitation in the space of the height and bottom at top.Because the composition of detector is complicated,
And large number of, detector inevitably problem in PET device running, confirming specific where detector
When unit breaks down and the detector cells to breaking down carry out maintenance, repair, because trouble point is uncertain, may
It is excessively narrow although occurring that there is operating space, or need to get off the shell integral demounting of PET device, can just have
The determination for carrying out trouble point of effect, causes the fault diagnosis and inconvenient maintenance of detector cells.Meanwhile, using existing detection
Device unit installing structure, when if desired carrying out maintenance, repair or enter the upgrading of row detector to detector cells, generally
The whole former detector cells for needing whole dismounting to be arranged on module mounting plate, or need groups of dismounting to paste what is connected
Detector group, rather than a detector cells, maintenance maintenance brings very big inconvenience, to the user of equipment bring it is heavy
Maintenance cost.Additionally, with the renewal of the equipment replacement or the raising of customer demand, the demand upgraded to original PET machines is continuous
Increase, existing detector cells mounting means is also unfavorable for the upgrading of existing device.
Therefore, detector installation, maintenance change whether be conveniently PET device Design of Hardware Architecture a key point.
The content of the invention
It is an object of the invention to provide a kind of sweep mechanism of PET device, the fitting machine for installing detector cells
Frame is rotary structure, in detector cells installation, fault diagnosis, maintenance process and during upgrading, can by rotating installation frame,
Specified detector cells are rotated to the proper operation point of operating personnel's selection, whole installation, maintenance process is very convenient,
Meanwhile, detector cells are set for modularization, and every group of pet detector unit is all live dismountable structure, when detector list
When first failure occurs, it is only necessary to change the pet detector unit for breaking down.
To reach above-mentioned purpose, solution of the invention is：
A kind of sweep mechanism of PET device, including rotary scanning frame, in the rotary scanning frame
The detector cells that multigroup modularization is set；
The rotary scanning frame includes the supporting mechanism being oppositely arranged, a position-limit mechanism, is fixed on the support
It is used to install caged framework mechanism and a driving link of multigroup detector cells between mechanism and position-limit mechanism；
The caged framework mechanism includes the two groups of module mounting plates and multigroup hanger that are oppositely arranged, two groups of modules
Installing plate is cyclic structure, one group of module mounting plate is fastenedly connected with the supporting mechanism of homonymy, another group of module mounting plate with it is same
The position-limit mechanism of side is fastenedly connected to support whole caged framework mechanism and to caged framework mechanism axial limiting；It is described many
Group hanger is axially set up on the outer edge of two groups of module mounting plates, every group of two ends of hanger respectively with two groups of modules
Installing plate is fastenedly connected, and an at least detector cells are radially fastenedly connected on every group of hanger, between the detector cells mutually
Adjoin setting；
The driving link is arranged between the module mounting plate and homonymy supporting mechanism, and it includes a vertically disposed company
Fishplate bar and a supporting plate, the connecting plate radially fits the supporting mechanism and the module mounting plate is set, and connecting plate with
The supporting mechanism, the module mounting plate are fastenedly connected to realize the fixation between supporting mechanism and module mounting plate respectively,
The supporting plate be a Circular Plate, the supporting plate it is corresponding with the annulus on the module mounting plate axially be arranged connection so that
Obtain the caged framework mechanism and rubbed around the supporting plate and rotate.
The inner ring radial section of the module mounting plate is circle, the diameter correspondence module mounting plate of the supporting plate
Internal diameter set so that surface cover where face and the supporting plate outer wall where the module mounting plate inwall sets and is connected to drive cage
Formula frame mechanism rotates around the lateral surface of the supporting plate.Or, the module mounting plate is circular ring structure, the supporting plate
The external diameter of the internal diameter correspondence module mounting plate is set, so that face and the supporting plate inwall where the module mounting plate outer wall
Place surface cover sets connection to drive the caged framework mechanism to be rotated in the medial surface of the supporting plate.Or, the module is installed
The side of plate is provided with a toroidal cavity, and the size of the size correspondence toroidal cavity of the supporting plate is set, so that institute
Supporting plate is stated to be entrenched in the annular groove to drive the caged framework mechanism to rotate.
Further, the supporting plate is different from the facestock matter that the module mounting plate is in contact is set.
Further, rolling bearing or ball are provided with the face that the supporting plate is in contact with the module mounting plate.
Preferably, the spacing of two groups of module mounting plates, the length of the hanger are set not less than d*n, and wherein d is to treat
The length of detector cells is installed, n is the quantity of detector cells to be installed.
As a preferred scheme, position-limit mechanism setting identical with the supporting mechanism structure, including a backboard support,
The scanning gantry includes two groups of driving links, and one group of driving link is set between the module mounting plate and backboard support per side；Or, institute
Caged framework mechanism is stated for cylindrical shape, the position-limit mechanism is arranged on the lower section of the caged framework mechanism, position-limit mechanism with
The face that the caged framework mechanism is in contact is arcwall face to support simultaneously caged framework mechanism described in axial limiting.
Preferably, between the connecting plate and the backboard support, between the connecting plate and the module mounting plate divide
Multiple screws Dui Ying not be opened up, the connecting plate is respectively fixedly connected with via screw with the backboard support, module mounting plate.
Preferably, the scanning gantry also includes a base, the position-limit mechanism and the supporting mechanism respectively with it is described
Base is fastenedly connected.
The hanger is included for hanging the connecting rod of the detector cells and the company positioned at the connecting rod two ends
Ear connecting plate, two groups of module mounting plates correspondence connecting rod is provided with multiple draw-in grooves, and the connecting rod is via the card fluted shaft
To being set up on two groups of module mounting plates, the connection otic placode per side is fastened with the module mounting plate and connecting rod of homonymy respectively
Connection.
Preferably, the connection otic placode is fixedly connected with described module mounting plate and connecting rod via screw.
Preferably, described each draw-in groove is set relative to radial skew, and angle of inclination is 360 °/N, wherein, N is a detection
The maximum quantity of the detector cells that device ring can be accommodated.
Preferably, the quantity of the hanger is even number, and multigroup hanger is uniform on the outward flange of the module mounting plate
It is symmetrical.
Preferably, multigroup groove for housing detector ID units is additionally provided with the hanger, the groove is arranged at
The top of every group of detector cells, the quantity of quantity correspondence detector cells is set, and the ID units are fixed on described recessed
In groove, and each ID unit is communicated to connect with corresponding detector cells.
The rotary scanning frame also includes a front support plate, and the parallel hanger of front support plate is set,
The two ends of front support plate are fixed on two groups of module mounting plates, and every group fixed on the front support plate and same hanger
The bottom of detector cells is fastenedly connected and spacing with the bottom to multigroup detector cells.
The rotary scanning frame correspondence front support plate is provided with two groups of front support shelves, before described every group
Supporting shelf is parallel is radially arranged at end, is separately fixed at the inner side of homonymy module mounting plate, and front support shelf outward flange
Described each the front support plate of correspondence is provided with multiple putting slots.
Preferably, the putting slot is that the width being open radially-inwardly gradually successively decreases.
The modular detector cells include a detector module and the shell for housing the detector module
Body, the detector module is fixed in the housing, and top and the hanger of each housing are fastenedly connected.
Preferably, every group of housing includes a base plate for being used for fixed detector module and around the detector mould
Three groups of fixed plates that block is set, the base plate is fixedly connected sequentially to constitute the placement detector mould with three groups of fixed plates
The accommodation space of block, the top of the base plate is fastenedly connected with the hanger, and bottom and the front support plate of the base plate are fixed
It is connected.
Preferably, the base plate is aluminum plate.
Preferably, the accommodation space is the truncated rectangular pyramids structure that cross section area is gradually successively decreased radially inward.
Preferably, the base plate of the truncated rectangular pyramids structure is parallel is radially arranged as origin reference location face.
Preferably, the corner angle of the truncated rectangular pyramids structure is not more than 360 °/N settings.
The detector module includes front end electronics component and crystal assembly, and the front end electronics component is arranged at described
The inside of housing, the crystal assembly is arranged at the hull outside, the front end electronics component and the crystal assembly via
Flexible connection line is communicated to connect.
Preferably, the crystal assembly includes at least one set of crystal and a mounting suspension member, described mounting suspension member one end with
Multigroup crystal respectively socket connection, the other end and the corresponding housing be fastenedly connected with so that the crystal assembly be fixed on it is described
On housing.
A kind of PET device, including foregoing sweep mechanism, are easy to the installation and dismounting of pet detector unit.
Due to using such scheme, the beneficial effects of the invention are as follows：
Rotary scanning frame shown in the present invention, caged framework mechanism is self by the backboard support and limit positioned at two ends
Position mechanism fix so that vacantly set and axial limiting for installation of modular detector cells, meanwhile, in backboard support
One driving link is set and the module mounting plate of homonymy between, and driving link includes the parallel connecting plate being radially arranged and parallel to axle
To the annular supporting plate for setting, connecting plate and supporting plate be vertically arranged, wherein, connecting plate respectively with the backboard support of homonymy and
The module mounting plate of caged framework mechanism is fixedly connected, and supporting plate vertical module installing plate is set, and whole annular supporting plate
It is set on module mounting plate on a corresponding anchor ring, cooperation is arranged by the axial direction between two annulus, so that module
Installing plate can rub around supporting plate and rotate.When the installation or removal of detector cells are carried out, connecting plate and backboard are maintained
Support is fixedly connected constant, being fixedly connected between loosening connecting plate and module mounting plate, then promotes whole caged framework machine
Structure, you can to cause that caged framework mechanism rotates on the supporting plate, such operating personnel can select properly according to the need for itself
Fixed operating point operated, effectively raise installation effectiveness.
Additionally, rotary scanning frame also includes a front support plate and corresponding front support shelf, front end
Supporting plate is arranged on the housing bottom for installing detector cells, parallel to hanger-setting, its institute with suspension on a hanger
The bottom for having housing is fastenedly connected with spacing to multigroup housing bottom so that the inner of detector cells can be consolidated
It is fixed, and crystal positioning is inaccurate caused by avoiding the occurrence of situation about all around rocking, front support shelf is arranged on homonymy module
The inside of installing plate, outward flange every group of front support plate of correspondence of front support shelf is provided with draw-in groove to realize to front support plate
The fixation of port, so sets the installation connection reliability that improve each detector cells, will not cause its inner crystal
Buckling deformation.
Using the detector cells structure being engaged with above-mentioned rotary scanning frame, it is determined that some or multiple PET
When detector cells break down, it is only necessary to change the pet detector unit for breaking down.It includes a detector module
And for housing the housing of detector module, the detector module is fixed in the housing, housing is radially suspended on extension
On frame, top and the hanger of housing are fastenedly connected, and mutually adjoin setting between housing, and every group of housing is used to house one group of detection
Device module, with detector module annularly arrangement on module mounting plate, form one or more groups of detector rings.When
Judge that certain detector module breaks down, it is necessary to when changing or repairing, by the hanger where the detector module that breaks down
Disassembled on slave module installing plate, then take out hanger, the housing that is fastenedly connected with hanger and accommodating spy in the housing
Survey device module also take out therewith, then taken out from housing by the detector module for breaking down, you can repaired or
Change, or will directly send out and loosen the housing that breaks down and be directly connected with hanger, radially taking-up housing, then by failure
Detector module taken out from housing.
Meanwhile, every group of housing only installs the front end assembly of detector module, and crystal assembly is arranged on hull outside, preceding
Communicated to connect via flexible connection line between terminal circuit component and crystal, crystal assembly is fastened by mounting suspension member with lower housing portion
Connection, so when simply circuit or crystal send failure in detector module, only uses and changes the corresponding circuit of generation or crystalline substance
Body, reduces the cost and difficulty of maintenance.
PET device shown in the present invention, as a result of above-mentioned scanning gantry structure, can be more convenient carry out PET spies
Survey installation, dismounting and the maintenance of device unit.
Brief description of the drawings
Fig. 1 is to install some groups of structural representations of the sweep mechanism of the PET device of detector cells；
Fig. 2 is to install one group of front view of the sweep mechanism of the PET device of detector cells；
Fig. 3 is the side view of embodiment illustrated in fig. 2；
Fig. 4 is the structural representation of embodiment illustrated in fig. 2；
Fig. 5 is the enlarged drawing at I in sweep mechanism structural representation shown in Fig. 4；
Fig. 6 is the enlarged drawing at II in sweep mechanism structural representation shown in Fig. 4；
Fig. 7 is the structural representation of rotary scanning frame in embodiment illustrated in fig. 1；
Fig. 8 is the front view of the rotary scanning frame shown in Fig. 7；
Fig. 9 is the A-A direction views of the rotary scanning frame shown in Fig. 8；
Figure 10 is the enlarged drawing at the middle III of the rotary scanning frame shown in Fig. 9；
Figure 11 is the enlarged drawing at the middle IV of the rotary scanning frame shown in Fig. 9；
Figure 12 is the structural representation of driving link in sweep mechanism shown in Fig. 9；
Figure 13 is the front view of the attachment structure of hanger and housing in embodiment illustrated in fig. 1；
Figure 14 is the schematic perspective view of hanger shown in Figure 13 and the attachment structure of housing；
Figure 15 is the side view of hanger shown in Figure 13 and the attachment structure of housing；
Wherein：Rotary scanning frame 100, base 110, supporting mechanism 120, backboard support 121, driving link 170, connection
Plate 171, supporting plate 172, caged framework mechanism 130, module mounting plate 131, draw-in groove 131-1, hanger 132, connecting rod 132-1,
Connection otic placode 132-2, groove 132-3, front support plate 140, ID units 150, front support shelf 160, putting slot 161, detection
Device unit 200, crystal assembly 212, crystal 212-1, mounting suspension member 212-2, housing 220, base plate 221.
Specific embodiment
The present invention will be further described with reference to the accompanying drawings.
As shown in Fig. 1 to Figure 15, the invention discloses a kind of sweep mechanism of PET device, including rotary scanning frame
100, the detector cells 200 that the multigroup modularization in rotary scanning frame 100 is set, rotary scanning frame
100 caged framework mechanism can be arranged on caged framework mechanism around the axial-rotation of sweep mechanism, the annular of detector cells 200
In, every group of detector cells are live demountable structure, by both cooperations, in can easily and fast realizing PET device
The I＆M of detector.
As shown in Fig. 5 to Figure 12, rotary scanning frame 100 includes base 110, is fixed on base 110 and is oppositely arranged
A supporting mechanism 120, a position-limit mechanism, be fixed between supporting mechanism 120 and position-limit mechanism be used for multigroup detector is installed
The caged framework mechanism 130 of unit 200.
Specifically, as shown in Figure 8,9, 10, caged framework mechanism 130 includes two groups of module mounting plates being oppositely arranged
131 and multigroup hanger 132, two groups of module mounting plates 131 are cyclic structure, and the two is oppositely arranged to be formed for PET bed bodies
The passage of turnover, the installation site of correspondence detector cells 200 is provided with multiple openings to facilitate radiating with shape on ring flat-plate face, its
In one group of module mounting plate 131 be fastenedly connected with the supporting mechanism 120 of homonymy, the limit of another group of module mounting plate 131 and homonymy
Position mechanism is fixedly connected and can be effectively fixed on supporting mechanism 120 so as to caged framework mechanism 130 is overall and do not occur axially
Displacement.
As a preferred scheme, position-limit mechanism setting identical with supporting mechanism structure, including a backboard support 121, two
Individual backboard support 121 is fastenedly connected with caged framework mechanism 130 is supported and axial limiting with to caged framework mechanism 130 respectively,
If set two groups of supporting mechanisms 120, two groups of supporting mechanisms 120 are fixed on base 110 via stud respectively, caged framework
The two ends of mechanism 130 are that two pieces of module mounting plates adjoin a backboard support 121 and set and tight with the backboard support 121 of homonymy respectively
It is solidly connected.The bottom of backboard support 121 is fastenedly connected with base 110 again, it is illustrated that be fixedly connected to cause for screw in embodiment
Backboard support in order to strengthen the weight capacity of backboard support 121, therefore also increases as the basis of whole frame below backboard support
If multigroup reinforcement, multigroup reinforcement is uniformly distributed, bottom is fixed on base 110, and sidepiece is fixedly connected with backboard support.It is right
Answer, driving link 170 is also provided with two groups, respectively between backboard support 121 and module mounting plate 131.
The annexation to the backboard support 121, driving link 170 and module mounting plate of homonymy is described in detail below.
As shown in Fig. 9 to Figure 12, a driving link 170 is set between the module mounting plate and backboard support 121 of side, often
Group driving link 170 is arranged between the backboard support 121 of homonymy and module mounting plate 131, and it includes a connecting plate 171 and one
Fagging 172, the supporting plate 172 of connecting plate 171 and is vertically arranged, the backboard support 121 and mould of the radial direction laminating homonymy of connecting plate 171
Block installing plate 131 is set, and backboard support 121 is fastenedly connected to realize that homonymy is supported with module mounting plate 131 via connecting plate 171
Fixation between mechanism 120 and module mounting plate 131.Supporting plate 172 be parallel to an axially arranged Circular Plate, its be used for
Support cage frame mechanism annular is arranged connection, to cause that caged framework mechanism 130 can rotate in two groups of supporting plates 172.
Used as a preferred scheme, as shown in figure 9, the inner ring radial section of module mounting plate is round shape, driving link 170 is one
Vertically disposed L-type Circular Plate.Radially laminating backboard support 121 and module mounting plate 131 set respectively for the both sides of connecting plate 171
Put, and connecting plate 171 and backboard support 121, module mounting plate 131 be fastenedly connected respectively with realize homonymy supporting mechanism 200 with
Between module mounting plate 320 close to fixation so that caged framework mechanism integrally can effectively be fixed on two groups of groups support machines
Between structure 120.Wherein in an embodiment, as shown in Fig. 7 to Figure 11, multiple first kind screws and many are opened up on connecting plate 171
Individual Equations of The Second Kind screw, backboard support 121, module mounting plate 131 correspond to respectively first kind screw and Equations of The Second Kind screw be also provided with it is many
Individual screw, connecting plate 171 is respectively fixedly connected with via screw with backboard support 121, module mounting plate 131.In view of when detection
When device module is all installed to caged framework mechanism 130, total load is larger, in order that it is more steady to obtain scanning gantry structure
Fixed, stress distribution is uniform, therefore the first kind screw and multiple Equations of The Second Kind screw intervals on connecting plate 171 are uniformly distributed.Such as preceding institute
State, supporting plate 172 is that, parallel to an axially arranged Circular Plate, the internal diameter of the size respective modules installing plate 131 of its external diameter sets
Put, so that face where the module mounting plate inwall sets with surface cover where the supporting plate outer wall and is connected, i.e., connecting plate 171 is arranged
In module mounting plate 131, so as to caged framework mechanism can be driven to be rotated around the outer wall of the supporting plate；This outer mold piece is installed
Plate 131 is shelved in supporting plate 172 can also carry out Auxiliary support to whole caged framework mechanism 130.Because PET device makes
Need not repair during and often, in order to prevent not operating for a long time, cause under gravity module mounting plate 131 with
Supporting plate 172 sticks together the situation of fusion, while in order to reduce frictional force during rotation, therefore the contact surface or entirety of the two
Material is different to be set, while reducing the frictional force for rotating, some rollings can be also as the case may be set on the contact surface of the two
Pearl or roller bearing are reducing resistance during rotation.So set, to the profile of module mounting plate 131 without specific requirement, i.e. cage
Frame mechanism can be the annular of diagram, also can the shape such as generally square or rectangle.
Used as a preferred scheme, module mounting plate 131 is circular ring structure, and driving link 170 is a vertically disposed inverted L shape circle
Ring flat-plate, including connecting plate 171 and supporting plate 172, connecting plate 171 and backboard support 121 and the annexation of module mounting plate 131
As it was previously stated, here is omitted, the external diameter of the internal diameter correspondence module mounting plate of supporting plate 172 is set, so that the mould
Face sets with surface cover where the supporting plate inwall and is connected where block installing plate outer wall, i.e., module mounting plate is set in supporting plate 172
It is interior, so that caged framework mechanism can integrally rotate in the medial surface of supporting plate 172,
Used as a preferred scheme, the side that module mounting plate closes on backboard installing plate is provided with a toroidal cavity, actively
Part 170 be a vertically disposed T-shaped Circular Plate, connecting plate 171 be arranged between backboard support 121 and module mounting plate 131 and
Be respectively fixedly connected with the two, the size of supporting plate 172 to should the size of toroidal cavity set so that the Circular Plate is embedding
Close in the annular groove, such caged framework mechanism is overall also rotatable.
Additionally, when one group of supporting mechanism is only set, then driving link 170 is correspondingly arranged one group, positioned at the backboard branch of homonymy
Between frame 121 and module mounting plate 131, Circular Plate is set perpendicular to plane where shown module mounting plate, on module mounting plate
An anchor ring and the supporting plate where anchor ring is corresponding is arranged connection with so that the caged framework mechanism is along the supporting plate
Anchor ring friction rotation, the position-limit mechanism be used for coordinate backboard support 121 to caged framework mechanism axial limiting, to prevent cage
Formula frame mechanism 130 comes off during rotation from driving link 170.In a wherein embodiment, caged framework mechanism 130 is
Circular ring structure, position-limit mechanism is arranged on the side-lower of the caged framework mechanism 130, position-limit mechanism and the caged framework mechanism
The face being in contact be arcwall face, and arcwall face curvature it is identical with the curvature of homonymy module mounting plate 131 setting with support simultaneously axle
To the spacing caged framework mechanism, so that caged framework mechanism 130 can be supported and be rotated.
Using the PET device shown in the present invention rotary scanning frame 100 when, carrying out pet detector unit 200
During installation, maintain the stud between two groups of connecting plates 171 and two groups of backboard supports 121 to be fastenedly connected state, then loosen two groups
Stud between module mounting plate 131 and two groups of connecting plates 171, because two groups of module mounting plates 131 are respectively rested on two groups of branch
On fagging 172, the two is all the unlike material that annulus and contact surface are used, therefore when whole caged framework mechanism 130 is promoted, cage
Formula frame mechanism 130 is overall can be rotated in two groups of supporting plates 172, and so, operating personnel may be selected the most suitable position of oneself
By rotating cage type mechanism 130, it would be desirable to which the position for installing detector unit is gone to being operated in face of oneself.Similarly, exist
Carry out when making a definite diagnosis with maintenance of the failure of pet detector unit 200, it is not necessary to disassemble the single-piece frame of PET device, and only
The part for dismantling casing is needed to form a suitable action pane, then by rotating caged framework mechanism 120, to carry out PET
Detector cells 200 are made a definite diagnosis and maintenance.
Multigroup hanger 132 is respectively parallel to axially arranged, and every group of hanger 132 is axially set up in two groups of module mounting plates
On 131 outer edge, the two ends of hanger 132 are fastenedly connected with two groups of module mounting plates 131 respectively, and footpath on every group of hanger 132
To an at least detector cells 200 are fastenedly connected, setting is mutually adjoined between detector cells 200.
As shown in fig. 6, hanger 132 is included for installing the connecting rod 132-1 of detector cells 200 and positioned at connecting rod
The connection otic placode 132-2 at 132-1 two ends, correspondence connecting rod 132-1 is provided with multiple cards on two groups of outer edges of module mounting plate 131
Groove 131-1, so that connecting rod 132-1 can be axially erected on two groups of module mounting plates 131 via a pair of draw-in groove 131-1, homonymy
Module mounting plate 131 and connecting rod 132-1 between be fixedly connected via one group of connection otic placode 132-2 it is whole to realize hanger 132
Fixation of the body on module mounting plate 131.In the present embodiment, hanger 132 is split-type structural, connection otic placode 132-2, connecting rod
132-1 is fixedly connected via stud, so while effective guarantee bonding strength, is processed with respect to being reduced for integral structure
Difficulty and cost, connection otic placode 132-2 are arranged on every group of outside of module mounting plate 131, think the installation of detector cells 200
More spaces are provided.
Additionally, as shown in Fig. 2 for utilization space of trying one's best, multiple of installing as much as possible is visited in one group of detector rings
Device unit 200 is surveyed, each draw-in groove 131-1 is set relative to radial skew in the module mounting plate 131 shown in the present invention, inclination angle
It is 360 °/N to spend, and N is enclosed in detector rings for one, the maximum quantity of the detector cells that can be accommodated.
Meanwhile, as shown in figure 13, multigroup groove for housing detector ID units 150 is additionally provided with every group of hanger 132
132-3, groove 132-3 are arranged at every group of top of detector cells 200, and the quantity of quantity correspondence detector cells 200 is set.
In due to a PET device, detector cells 200 are large number of, if in the course of work, some or multiple detector cells
200 when breaking down, and it makes a definite diagnosis and exclude very difficult, the rotary scanning frame 100 shown in the present invention, on hanger 132
The fixed quantity of detector cells 200 of its suspension of correspondence is provided for the groove 132-3 of multigroup accommodating detector ID units 150,
ID units 150 are fixed in groove, and each ID unit 150 is communicated to connect by circuit with corresponding one group of detector cells 200,
When a certain group of detector cells 200 break down, the detector cells that can determine to break down in time by ID units 150
200 position.
Wherein in an embodiment, the hanger 132 for installing fixed detector unit 200 sets even number set, and multigroup
Hanger 132 is uniformly and symmetrically distributed on the outward flange of module mounting plate 131.Due at present carry out PET be imaged when, be to be based on into
To meet event realization, therefore when hanger 132 is uniformly distributed on module mounting plate 131, be radially suspended on hanger 132
Detector cells 200 also form the detector rings that a circle is uniformly and symmetrically distributed, and more can accurately carry out the reconstruction of PET image
Work.
In above-mentioned rotary scanning frame 100, two groups of spacing of module mounting plate 131, length of hanger 132 are not less than d*
N is set, and wherein d is the length of detector cells to be installed 200, and n is the quantity of detector cells to be installed 200.PET device
In, the quantity of detector cells 200 is more, and the degree of accuracy of PET imagings is also bigger, meanwhile, the quantity of detector cells 200 is got over
Many, the cost of PET device is also higher.The rotary scanning frame 100 of the PET device shown in the present invention, can be according to user
Demand, in cage mechanism set up one enclose the above pet detector ring for image reconstruction；When needs are upgraded
When, it is that the installation of new detector rings is pre- because the spacing of module mounting plate 131, the length of hanger 132 are set not less than d*n
Space is stayed, therefore has been only needed to continue in caged framework mechanism to set up new detector cells 200 and is formed new detector rings i.e.
Can, the waste of existing equipment is not resulted in, upgrade also more convenient.In embodiment shown in figure, after balance cost and efficiency,
Altogether there is provided 4 groups of housings 100, i.e., can form 4 groups of detector rings.
As shown in figure 5, the rotary scanning frame 100 shown in the present invention also includes a front support plate 140, front support
Plate 140 is arranged on the bottom of detector cells 200, its bottom with all detector cells 200 being fixed on same hanger 132
Portion is fixedly connected and parallel hanger 132 is set and carried out spacing with the bottom to the detector cells 200 on this group of hanger 132.From
And the inner of each detector cells 200 can be fixed, the connection reliability of detector cells 200 is improve, keep away as far as possible
That exempts from crystal 212-1 sticks up deformation.Due to the space very little residing for the bottom of detector cells 200, in order to realize front support plate 140
Fixation of the two ends on two groups of module mounting plates 131, therefore the corresponding front support plate 140 of rotary scanning frame 100 also sets up
Two front support shelves 160, each front support shelf 160 is arranged on the inner side of homonymy module mounting plate 131, and and mould
Block installing plate 131 is fixedly connected, and front support shelf 160 is the shelf of an annular, each front support of correspondence on annular shelf
The two ends of plate 140 set putting slot 161 so that the two ends of front support plate 140 can be connected on annular shelf, with to front support
Plate 140 is fixed, and finally realizes that the bottom of detector cells 200 is spacing, and whole detector cells 200 are in rotary scanning machine
Mounting stability on frame 100 is high, can effectively prevent crystal 212-1 from shifting the hair for causing image reconstruction accuracy reduction situation
It is raw.It is preferable to carry out as one, the A/F of putting slot 161 radially-inwardly gradually successively decreases on the outward flange of front support shelf 160, this
Sample is when the installation of detector cells 200 is carried out, although internal installing space is narrow, but is integrally fixed at detector cells 200
The front support plate 140 of bottom remains able to facilitate rapid grafting to be fixed on front support shelf 160.
Meanwhile, as shown in FIG. 13 to 15, in the sweep mechanism of the PET device shown in the present invention, detector cells 200 are
One can field stripping with install structure, it includes a detector module and the housing 220 for housing detector module,
Wherein, detector module includes front end electronics component and crystal assembly 212, and detector module is fixed in housing 220, each
The top of housing 220 is fastenedly connected with hanger 132, and the bottom of each housing 220 is fixedly connected with front support plate 140.
Using the detector cells 200 shown in invention, during installation, detector module is fixed in housing 220 first, so
It is fixed on hanger 132 in the housing 220 that will be equipped with detector module afterwards, finally by the two ends of hanger 132 and the mould of PET device
Block installing plate 131 is fixedly connected, you can realize the installation of detector cells 200；When carry out maintenance needs dismantle when, according to it is preceding
Opposite step, will disassemble, then on the slave module installing plate 131 of hanger 132 where the detector module for breaking down
Housing 220 where the detector module for breaking down is removed from the hanger 132, you can carry out the spy subsequently broken down
Survey the maintenance or replacing of device module.
It is made up of front end electronics component and crystal assembly 212 in view of detector module, in order to further carry
The convenience of height maintenance, wherein in an embodiment, as depicted in figs. 1 and 2, in every group of detector module, only by complex structure
Front end electronics component be arranged on the inside of housing 220, the crystal assembly 212 of simple structure is located at the outside of housing 220, crystal
Component 212 includes a crystal 212-1 and mounting suspension member 212-2, and crystal assembly 212 (refers specifically to housing 220 with housing 220
Bottom) between be detachably connected via a mounting suspension member 212-2, preferably bolt or Stud connection, crystal assembly 212 is (i.e.
Crystal 212-1) communicated to connect via flexible connection line and front-end circuit unit between, so, if simply crystal assembly 212 occurs
During failure, it is only necessary to mounting suspension member 212-2 is disassembled from the bottom of housing 220, front-end circuit unit and housing are kept
220 structures are constant, both cost-saved, also more repaired in convenient.
Used as a preferred embodiment, every group of housing 220 includes a base plate 221 for being used for fixed detector module and encloses
Around three groups of fixed plates that detector module is set, base plate 221 and three groups of fixed plates are fixedly connected sequentially to constitute placement detector
The accommodation space of module, top and the hanger 132 of base plate 221 are fastenedly connected；So set, carrying out the installation of detector module
When, after can front end electronics component be fixed on base plate 221 in advance, then fixed installation his three groups of fixed plates are installed, think structure
The installation of complicated front end electronics component provides enough operating spaces.
Further, the accommodation space that above-mentioned base plate 221 and three groups of fixed plates are constituted for cross section area radially inward
The truncated rectangular pyramids structure gradually successively decreased, general detector rings are loop configuration, in order to make full use of space, therefore will be used to install
The accommodation space of detector cells 200 is arranged to the truncated rectangular pyramids structure gradually successively decreased radially inward.Additionally, truncated rectangular pyramids structure
Base plate 221 is parallel to be radially arranged as origin reference location face, so enables to the crystal 212-1 centers of detector cells 200
As far as possible parallel to axial direction so that the accuracy of image reconstruction is higher.Meanwhile, in order to the most sufficiently utilize its inner space, to the greatest extent
The many more detector cells 200 of insertion of amount, the corner angle of truncated rectangular pyramids structure is not more than 360 °/N settings.
The invention also discloses a kind of PET device, including foregoing sweep mechanism, the detection of PET device is being carried out
The installation of device unit, fault diagnosis, maintenance process and during upgrading, can be revolved specified detector cells by rotating installation frame
Go at the proper operation point of operating personnel's selection, whole installation, maintenance process is very convenient, meanwhile, detector cells are mould
Blockization is set, and every group of pet detector unit is all live dismountable structure, when detector cells failure occurs, it is only necessary to
The pet detector unit that replacing is broken down.
The above-mentioned description to embodiment is understood that and uses the present invention for ease of the member of ordinary skill of the technical field.
Person skilled in the art obviously can easily make various modifications to these embodiments, and described herein general
Principle is applied in other embodiment without by performing creative labour.Therefore, the invention is not restricted to above-described embodiment, ability
Field technique personnel announcement of the invention, does not depart from improvement that scope made and modification all should be of the invention
Within protection domain.
Claims (28)
1. a kind of sweep mechanism of PET device, it is characterised in that：Including rotary scanning frame, rotatably swept installed in described
Retouch the detector cells that the multigroup modularization in frame is set；
The rotary scanning frame includes the supporting mechanism being oppositely arranged, a position-limit mechanism, is fixed on the supporting mechanism
It is used to install caged framework mechanism and a driving link of multigroup detector cells between position-limit mechanism；
The caged framework mechanism includes the two groups of module mounting plates and multigroup hanger that are oppositely arranged, and two groups of modules are installed
Plate is cyclic structure, and one group of module mounting plate is fastenedly connected with the supporting mechanism of homonymy, another group of module mounting plate and homonymy
Position-limit mechanism is fastenedly connected to support whole caged framework mechanism and to caged framework mechanism axial limiting；Multigroup extension
Frame is axially set up on the outer edge of two groups of module mounting plates, and every group of two ends of hanger are installed with two groups of modules respectively
Plate is fastenedly connected, and an at least detector cells are radially fastenedly connected on every group of hanger, is mutually adjoined between the detector cells
Set；
The driving link is arranged between the module mounting plate and homonymy supporting mechanism, and it includes a vertically disposed connecting plate
With a supporting plate, the connecting plate radially fits the supporting mechanism and the module mounting plate is set, and connecting plate with it is described
Supporting mechanism, the module mounting plate are fastenedly connected to realize the fixation between supporting mechanism and module mounting plate respectively, described
Supporting plate is a Circular Plate, and the supporting plate is corresponding with the annulus on the module mounting plate to be axially arranged connection to cause institute
State caged framework mechanism and rubbed around the supporting plate and rotate.
2. the sweep mechanism of PET device according to claim 1, it is characterised in that：The inner ring footpath of the module mounting plate
It is circle to tangent plane, the internal diameter of the diameter correspondence module mounting plate of the supporting plate is set, so that the module mounting plate
Face sets with surface cover where the supporting plate outer wall and is connected to drive the caged framework mechanism around the supporting plate where inwall
Lateral surface rotation.
3. the sweep mechanism of PET device according to claim 1, it is characterised in that：The module mounting plate is annulus knot
Structure, the external diameter of the internal diameter correspondence module mounting plate of the supporting plate is set, so that face where the module mounting plate outer wall
Set with surface cover where the supporting plate inwall and be connected to drive the caged framework mechanism to be rotated in the medial surface of the supporting plate.
4. the sweep mechanism of PET device according to claim 1, it is characterised in that：The side of the module mounting plate sets
The size for having a toroidal cavity, the size correspondence toroidal cavity of the supporting plate is set, so that the supporting plate is embedding
Close in the toroidal cavity to drive the caged framework mechanism to rotate.
5. the sweep mechanism of PET device according to claim 1, it is characterised in that：The supporting plate is pacified with the module
The face that dress plate is in contact sets unlike material.
6. the sweep mechanism of PET device according to claim 5, it is characterised in that：The supporting plate is pacified with the module
Rolling bearing or ball are provided with the face that dress plate is in contact.
7. the sweep mechanism of PET device according to claim 1, it is characterised in that：Between two groups of module mounting plates
Set not less than d*n away from the length with the hanger, wherein d is the length of detector cells to be installed, n is detector to be installed
The quantity of unit.
8. the sweep mechanism of PET device according to claim 1, it is characterised in that：The position-limit mechanism and the support
The identical setting of mechanism structure, including a backboard support, the scanning gantry include two groups of driving links, per side module mounting plate with
One group of driving link is set between backboard support.
9. the sweep mechanism of PET device according to claim 1, it is characterised in that：The caged framework mechanism is cylinder
Body shape, the position-limit mechanism is arranged on the lower section of the caged framework mechanism, and position-limit mechanism connects with the caged framework mechanism
Tactile face is arcwall face to support simultaneously caged framework mechanism described in axial limiting.
10. the sweep mechanism of PET device according to claim 8, it is characterised in that：The connecting plate and the backboard branch
Corresponding respectively between frame, between the connecting plate and the module mounting plate to open up multiple screws, the connecting plate is via screw
It is respectively fixedly connected with the backboard support, module mounting plate.
The sweep mechanism of 11. PET devices according to claim 1, it is characterised in that：The scanning gantry also includes a bottom
Seat, the position-limit mechanism is fastenedly connected with the base respectively with the supporting mechanism.
The sweep mechanism of 12. PET devices according to claim 1, it is characterised in that：The hanger is included for hanging institute
State the connecting rod and the connection otic placode positioned at the connecting rod two ends of detector cells, two groups of module mounting plates correspondence institute
State connecting rod and be provided with multiple draw-in grooves, the connecting rod is axially set up on two groups of module mounting plates via the draw-in groove, often
The connection otic placode of side is fastenedly connected with the module mounting plate and connecting rod of homonymy respectively.
The sweep mechanism of 13. PET devices according to claim 12, the connection otic placode and described module mounting plate and
Connecting rod is fixedly connected via screw.
The sweep mechanism of 14. PET devices according to claim 12, each described draw-in groove is set relative to radial skew,
Angle of inclination is 360 °/N, wherein, N is the maximum quantity of the detector cells that a detector rings can be accommodated.
The sweep mechanism of 15. PET devices according to claim 12, the quantity of the hanger is even number, multigroup hanger
It is uniformly and symmetrically distributed on the outward flange of the module mounting plate.
The sweep mechanism of 16. PET devices according to claim 1, is additionally provided with multigroup for accommodating detection on the hanger
The groove of device ID units, the groove is arranged at the top of detector cells described in every group, the number of quantity correspondence detector cells
Amount is set, and the ID units are fixed in the groove, and each ID unit is communicated to connect with corresponding detector cells.
The sweep mechanism of 17. PET devices according to claim 1, it is characterised in that：The rotary scanning frame is also wrapped
A front support plate is included, the parallel hanger of front support plate is set, and the two ends of front support plate are fixed on two groups of modules
On installing plate, and the front support plate is fastenedly connected with to institute with the bottom of every group of detector cells fixed on same hanger
The bottom for stating multigroup detector cells is spacing.
The sweep mechanism of 18. PET devices according to claim 17, it is characterised in that：The rotary scanning frame pair
The front support plate is answered there is provided two groups of front support shelves, front support shelf is parallel described in every group is radially arranged, respectively
The inner side of homonymy module mounting plate is fixed on, and outward flange each described front support plate of correspondence of front support shelf is provided with many
Individual putting slot.
The sweep mechanism of 19. PET devices according to claim 18, it is characterised in that：The width footpath of the putting slot opening
To inwardly gradually successively decreasing.
The sweep mechanism of 20. PET devices according to claim 1, it is characterised in that：The modular detector cells
Housing including a detector module and for housing the detector module, the detector module is fixed on the housing
In, top and the hanger of each housing are fastenedly connected.
The sweep mechanism of 21. PET devices according to claim 20, it is characterised in that：Housing described in every group includes that one uses
The three groups of fixed plates set in the base plate of fixed detector module and around the detector module, the base plate and described three
Group fixed plate is fixedly connected sequentially and the accommodation space of the detector module, the top of the base plate and the extension is placed to constitute
Frame is fastenedly connected, and bottom and the front support plate of the base plate are fixedly linked.
The sweep mechanism of 22. PET devices according to claim 21, it is characterised in that：The base plate is aluminum plate.
The sweep mechanism of 23. PET devices according to claim 21, it is characterised in that：The accommodation space is tangent plane face
The truncated rectangular pyramids structure that product is gradually successively decreased radially inward.
The sweep mechanism of 24. PET devices according to claim 23, it is characterised in that：The base plate of the truncated rectangular pyramids structure
It is parallel to be radially arranged as origin reference location face.
The sweep mechanism of 25. PET devices according to claim 23, it is characterised in that：The drift angle of the truncated rectangular pyramids structure
Angle is not more than 360 °/N settings, and N is enclosed in detector rings for one, the maximum quantity of the detector cells that can be accommodated.
The sweep mechanism of 26. PET devices according to claim 20, it is characterised in that：The detector module includes preceding
End electronic building brick and crystal assembly, the front end electronics component are arranged at the inside of the housing, and the crystal assembly is set
In the outside of the housing, the front end electronics component is communicated to connect with the crystal assembly via flexible connection line.
The sweep mechanism of 27. PET devices according to claim 26, it is characterised in that：The crystal assembly is included at least
One group of crystal and a mounting suspension member, described mounting suspension member one end and at least one set of crystal difference socket connection, the other end
It is fastenedly connected to cause that the crystal assembly is fixed on the housing with corresponding housing.
A kind of 28. PET devices, including one scan mechanism, it is characterised in that：The sweep mechanism is such as claim 1 to 27 times
Sweep mechanism described in one.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510227580.2A CN104825181B (en) | 2015-05-07 | 2015-05-07 | The sweep mechanism and PET device of a kind of PET device |
| PCT/CN2016/080882 WO2016177310A1 (en) | 2015-05-07 | 2016-05-03 | Scanning mechanism of pet device and pet device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510227580.2A CN104825181B (en) | 2015-05-07 | 2015-05-07 | The sweep mechanism and PET device of a kind of PET device |
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| Publication Number | Publication Date |
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| CN104825181A CN104825181A (en) | 2015-08-12 |
| CN104825181B true CN104825181B (en) | 2017-07-07 |
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| CN201510227580.2A Active CN104825181B (en) | 2015-05-07 | 2015-05-07 | The sweep mechanism and PET device of a kind of PET device |
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| WO (1) | WO2016177310A1 (en) |
Cited By (1)
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|---|---|---|---|---|
| CN106492357A (en) * | 2016-12-13 | 2017-03-15 | 合肥中科离子医学技术装备有限公司 | A kind of cellular reinforcing plate structure suitable for inside proton therapeutic appts rotary frame |
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| CN104825181B (en) * | 2015-05-07 | 2017-07-07 | 武汉数字派特科技有限公司 | The sweep mechanism and PET device of a kind of PET device |
| CN106580357A (en) * | 2016-11-15 | 2017-04-26 | 上海联影医疗科技有限公司 | Detector rack |
| US10267930B2 (en) | 2016-09-30 | 2019-04-23 | Shanghai United Imaging Healthcare Co., Ltd. | Systems for PET imaging |
| US10534097B2 (en) | 2016-10-14 | 2020-01-14 | Shanghai United Imaging Healthcare Co., Ltd. | Detector structure in a PET system |
| CN106333704B (en) * | 2016-10-14 | 2021-12-28 | 上海联影医疗科技股份有限公司 | PET rack |
| CN108186041B (en) * | 2018-01-22 | 2020-12-04 | 苏州晶特晶体科技有限公司 | Integrated DOI image-reinforced PET annular array structure and processing method |
| CN109846503B (en) * | 2018-05-07 | 2021-06-01 | 山东麦德盈华科技有限公司 | Full-angle coincidence PET detection method |
| CN112932519A (en) * | 2021-04-10 | 2021-06-11 | 上海健康医学院 | SPECT detector based on differentiation |
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| WO2016177310A1 (en) | 2016-11-10 |
| CN104825181A (en) | 2015-08-12 |
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Denomination of invention: A scanning mechanism and PET equipment for PET equipment Effective date of registration: 20230331 Granted publication date: 20170707 Pledgee: Anhui pilot Free Trade Zone Hefei area sub branch of Huishang Bank Co.,Ltd. Pledgor: Hefei Ruishi Digital Technology Co.,Ltd. Registration number: Y2023980037030 |
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